__________ always pairs with _________. a. adenine, guanine b. thymine, guanine c. guanine, cytosine d. cytosine, thymine
The correct option is (C) Guanine, Cytosine.
In DNA Adenine always pairs with thymine in base pairing, while guanine always couples with cytosine.
Base Pairing in DNA:
Two bases are referred to as a base pair when referring to a "rung of the DNA ladder." A sugar molecule, a phosphoric acid molecule, and a molecule known as a base make up a DNA nucleotide. The "letters" that make up the genetic code are the bases. Adenine, thymine, guanine, and cytosine are the compounds that are represented by the code letters A, T, G, and C in DNA, respectively.Adenine always pairs with thymine in base pairing, while guanine always couples with cytosine.Learn more about the Base Pair in DNA with the help of the given link:
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What is the relationship (embryological, functional) between your lungs and the "gas bladder" of a perch?
"Gas bladders" and lungs are similar organs, although they serve different functions.
Both of them develop from a location in the upper throat i.e. the pharynx and are used to manipulate gases. They both contain a good blood supply.
However, the lung is used for breathing and is often found in land vertebrates, while on the other hand, the gas or swim bladder is used in the regulation of buoyancy and the latter is found in all other bony fishes e.g. perch.
Perch use the swim bladder to control their buoyancy by filling it with oxygen from their gills using a gland, which is known as a gas gland. This expands the bladder, thereby pushing the fish toward the surface of the water.
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About how many infective doses would it take to establish hiv infection in the human body?
An infectious dose is capable of establishing HIV infection in the human body. HIV-positive person who has acute HIV infection could carry a transmission risk of up to 2% (the equivalent of 1 transmission per 50 exposures) for receptive 20% (equivalent to 1 transmission per 5 exposures) for receptive.
How quickly can HIV be transmitted?It takes time for the body to develop HIV antibodies after infection. Almost all persons develop antibodies within 2 to 12 weeks, but it can take up to 6 months after infection. A positive result means antibodies to HIV were found in your body. This means you have HIV infection.
With this information, we can conclude that Through saliva, tears, or sweat. By hugging, shaking hands, sharing toilets, sharing dishes, or closed-mouth or “social” kissing with someone who has HIV. Through other activities that don't involve the exchange of body fluids (for example, touching). Through the air.
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In our bodies, glucose is broken down into carbon dioxide and water, much like a combustion reaction. How many grams of o2 are needed to fully react with 150g glucose?
160g of O₂ will be required to fully react with 150g of glucose when glucose is broken down in our bodies to produce carbon dioxide and water.
The breakdown of glucose in our bodies can be represented by the following reaction:
C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(g)
As shown in the reaction, a mole of glucose reacts with 6 moles of oxygen.
To calculate the molecular mass:
1 mole of glucose (C₆H₁₂O₆) = (6x12) + (12x1) + (6x16) = 180g
6 moles of oxygen= 6x (2x16) = 192g
180g of glucose reacts with 192g of oxygen. So, to calculate the amount of oxygen required to fully react with 150g of glucose=
150 x 192/180 = 160g of oxygen.
Therefore, 160g of oxygen is required to fully react with 150g of glucose.
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When ______ reproduction occurs in a one-celled organism, the organism replicates its dna and splits into two genetically identical cells.
Answer:
Asexual
Explanation:
When asexual reproduction occurs in a one-celled organism, the organism replicates its DNA and splits into two genetically identical cells.
What is Reproduction?Reproduction may be defined as a biological process that involves the production of identical or dissimilar offspring by the successful fusion of two distinct parental gametes.
Asexual reproduction does not involve the mechanism of the successful fusion of two distinct parental gametes. Rather, it involves processes like budding, spore formation, binary fission, etc.
Binary fission is the mode of asexual reproduction that is mainly performed by single-celled organisms in order to replicate their DNA and split into two genetically identical cells.
Therefore, the type of reproduction that occurs in a one-celled organism, through which the organism replicates its DNA and splits into two genetically identical cells is known as asexual reproduction.
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Which areas of the brain undergo major growth spurts during middle childhood?
sensory and motor areas undergo major growth spurts during middle childhood.
The two types of motor (movement) skills that children acquire are called "fine motor skills" and "gross motor skills." Using hands and fingers to control smaller things is a function of fine motor abilities. coordination is a component of gross motor skills.Synaptic remodeling, or pruning, is a natural process of maturation. Additionally, because each child has a different experience, the brain grows in large part as a result. More often utilized synapses tend to be kept, whereas less frequently used synapses are lost.The brain is driven by the motor system, which also drives sensory stimulation and feedback. These abilities must advance and grow in order to support behavior and academic learning. Children that struggle academically or behaviorally frequently have underdeveloped sensory and motor systems.learn more about sensory and motor here: https://brainly.com/question/13061744
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Which substance can be found in the bloodstream of a nonsmoker five hours after exposure to environmental tobacco smoke?
Nicotine found in the bloodstream of a nonsmoker five hours after exposure to environmental tobacco smoke
Chewing tobacco and other tobacco products contain the chemical nicotine. The most accurate approach to assess nicotine exposure in smokers and non-smokers exposed to ambient tobacco smoke is to measure cotinine in people's blood.
Within seconds after inhaling nicotine, it reaches the brain. Nicotine enhances the release of neurotransmitters, brain chemicals that help control mood and behavior.
Nicotine is a toxic and very addicting substance. It may result in an increase in heart rate, blood flow to the heart, blood pressure, and artery constriction (vessels that carry blood). In addition to contributing to artery wall hardening, nicotine may also increase the risk of a heart attack.
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In which stage of mitosis does exchange of genetic material between chromosomes (crossing over) occur?
Meiosis's pachytene substage of prophase I is when crossing over occurs, but the diplotene substage of prophase I is when it becomes evident. Tetrads will be formed when the homologous chromosomes align with one another.
DNA sequences may be swapped between the homologous chromosomes during this lining up. It facilitates character mixing, resulting in the production of both parental and recombinant forms. Crossing over is the term for the form of genetic recombination that enables the meiotic daughter cells to differ genetically from one another.
Only chromosomes that are homologous can cross across. After meiosis I, cells turn haploid and are no longer capable of crossing across.
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In Biology, a binomial name is:
A. A two syllable name used to identify the species of an organism.
B. A name given to an organism that has Bilateral symmetry.
C. A first name and last name, commonly used in the United States and other westernized cultures.
D. A two part naming system that consists of the Genus name and the Species name.
Answer:
The correct answer is answer D
In Biology, a binomial name is A two part naming system that consists of the Genus name and the Species name.
In biology, a binomial name, also known as a scientific name or Latin name, is a two-part naming system used to uniquely identify and classify species of organisms. This system follows the rules of binomial nomenclature, established by Carl Linnaeus in the 18th century, and is based on Latin or Latinized names.
The binomial name consists of two parts:
Genus Name: The first part of the name represents the genus to which the species belongs. The genus is a higher taxonomic rank that includes a group of closely related species. It is always capitalized and italicized (or underlined if handwritten).Species Name: The second part of the name indicates the specific species within the genus. It is written in lowercase and also italicized (or underlined if handwritten).For example, in the binomial name "Homo sapiens," "Homo" is the genus name, and "sapiens" is the species name. Together, these two names provide a unique and standardized way to identify and refer to a particular species.
The use of binomial names is essential for accurate and clear communication in biological sciences, as common names for organisms can vary across languages and regions. Binomial nomenclature ensures that scientists around the world can refer to the same species using a standardized and universally recognized naming system. It also reflects the evolutionary relationships among organisms, as species within the same genus are more closely related than those in different genera.
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An example of sliding a joint is…
A Elbow joint
B Neck joint
C Knee Joint
D Wrist joint
An example of sliding joint is Wrist joint. Therefore, option (D) is correct.
Wrist joint is an example. The wrist joint allows sliding or gliding actions because the wrist bones move smoothly. Sliding improves hand dexterity, making it easier to do tasks like keyboard typing and managing tiny objects.
The radius, ulna, and hand carpals form the wrist joint, a complex articulation. The wrist joint's fluid gliding movement aids the hand's flexibility and nimbleness, making it important for many ordinary activities. Therefore, option (D) an example of sliding joint is Wrist joint.
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A human egg contains ________ chromosome and a human sperm contains ________ chromosome.
A human egg ---> 22 + X (23 chromosome)
A human sperm ---> 22 + X or 22 + Y (23 chromosome)
What does a vaccine contain? live active pathogens t cells against a pathogen weakened or killed pathogen or parts of a pathogen b cells against a pathogen
Vaccine contain weakened or killed pathogen or parts of a pathogen.
Blended vaccines contain whole bacteria or viruses which have been “weakened”(attenuated) so that they create a protective immune response but do not cause disease in healthy people. Vaccines, such as the measles, mumps, rubella, chickenpox, and nasal spray flu vaccines contain live, but weakened viruses. Vaccination is a simple, safe, and effective way of protecting you against life threatening diseases, before you come into contact with them. It uses your body's natural defenses to build resistance to specific infections and makes your immune system stronger. Vaccines are usually administered through needle injections, but some can be administered by mouth or sprayed into the nose.
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who is father of ecosystem?
eugene odum is the father of ecosystem
If the water potential of a cell is -800kpa and solute potential of the same cell is 600 kpa then the water potential of that cell at equilibrium is?
The water potential of that cell at equilibrium is -200kpa.
Solution:
given that
Water potential [tex]\psi = -800kpa[/tex]
solute potential [tex]\psi _s = 600kpa[/tex]
we need to find water potential at equilibrium [tex]\psi _ w = ?[/tex]
We know that water potential = [tex]\psi = -\psi_s + \psi_w[/tex]
-800 = -600 + [tex]\psi _w[/tex]
[tex]\psi _w[/tex] = -200kpa
What is Water Potential?The potential energy of water per unit volume in comparison to pure water under reference conditions is known as water potential. The tendency of water to migrate from one place to another due to osmosis, gravity, mechanical pressure, and matrix effects like capillary action is measured by water potential (which is caused by surface tension).Understanding and computing water movement inside plants, animals, and soil have proven to be made easier by the concept of water potential. Greek letter is frequently used to symbolize water potential, which is normally stated in terms of potential energy per unit volume.Water potential combines a number of various water movement-related potential forces that may work in parallel or in opposition to one another. Numerous possible elements may be active at once in complicated biological systems.To learn more about water potential with the given link
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Professor basco is lecturing about the nervous system. he tells the class that the role of the pituitary gland is to make and release _____ into ______.
Answer:
The pituitary gland makes, stores and releases
hormones. The pituitary gland is located at the base of your brain below your hypothalamus
The main function of your pituitary gland is to produce and
release several hormones that help carry out important
bodily functions, including: Growth. Metabolism (how your
body transforms and manages the energy from the food
you eat). Reproduction.
A virus life cycle that involves the incorporation of the viral dna into the host chromosome is.
A virus life cycle that involves the incorporation of the viral DNA into the host chromosome is lysogenic cycle.
What is Lysogenic cycle?For viral entry and replication within cells, the lysogenic cycle is a complement to the lytic cycle. While both bacterial phages and animal viruses share the lytic cycle, animal viruses are more likely to exhibit the lysogenic cycle.
The stages of the lysogenic cycle are as follows:
The viral genome invades the cell The viral genome merges with the host cell's genome. The host cell's DNA When a cell divides, virus chromosomes are passed on to the daughter cells by the polymerase. The viral genome separates from the host cell's DNA and enters stage 2 of the lytic cycle at any time the virus is "activated".Learn more about Lysogenic cycle here:
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If the presynaptic neuron increases the amount of neurochemical released, _____________ has occured
If the presynaptic neuron increases the amount of neurochemical released, presynaptic facilitation has occured.
Presynaptic facilitation
Changing the strength of connections between neurons is essential for the brain's capacity to store and process information. For less than a second, presynaptic facilitation, a type of short-term plasticity, improves synaptic transmission. Presynaptic facilitation is a pervasive phenomena that is regarded to be essential for the flow of information and brain processing. However, a major portion of our knowledge about facilitation's role is still theoretical. Here, we review the suggested functions of presynaptic facilitation and talk about how recent advances in understanding the underlying molecular mechanisms may make it possible to conduct experiments that clarify the roles that facilitation—and short-term plasticity in general—play in circuit function and animal behavior.
If the presynaptic neuron increases the amount of neurochemical released, _____________ has occured
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Approximately what percent of these products are recycled? aluminum: % steel: % copper: %
The percentage of these products which are recycled include the following:
50% Aluminum25 % steel60% copper.What is Recycling?This is defined as the process in which different types of waste are converted into usable materials through different processes and techniques.
Recycling is important as it helps to reduce incidences of pollution and wastage thereby improving the quality of living for humans and other organisms present on Earth. The percentage of aluminum, steel and copper products being recycled can be seen above.
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What is a gene? describe the function, structure, and location within the cell.
A gene is a relatively small piece of genetic data with the capacity to encode proteins.
Type III genes are involved in cell-to-cell signaling, whereas type II genes are a complicated mixture of all three types. Type I genes often function as immunological responses or sensory receptors, while type III genes are involved in cell-to-cell signaling.
Function: A gene is a section of DNA that describes the arrangement of amino acids in a protein's polypeptide chain. The primary purpose of genes is to create an organism that resembles its parent organism.
Structure: With the exception of certain viruses, which have genes made of a chemically related substance called ribonucleic acid, most genes are made of deoxyribonucleic acid (DNA) (RNA). Two strands of nucleotides that spiral around one another to resemble a twisted ladder make up a DNA molecule.
Location: Inside cells, there are little spaghetti-like structures called chromosomes that contain the genes. There are many billions of cells in our body. All living organisms are made up of very tiny components called cells.
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George wants to know which flower, a carnation or a rose, is more beautiful. he surveys his classmates to gather data. why is the survey considered pseudoscience? the data are objective. it involves a collection of facts. it involves a collection of opinions. the data are constantly updated.
It involves a collection of opinions is the survey considered pseudoscience.
What is pseudoscience in simple words?
A statement, discovery, or explanatory system that is presented as pseudoscience lacks the objectivity required by the scientific process. Research that is based on dubious ideas, a defective experimental design, or unreliable data can also lead to pseudoscience.What is pseudoscience in psychology?
A set of beliefs and procedures that resembles real science in some ways but cannot be regarded as such. Astrology, numerology, and arcane magic are some examples.
Who invented pseudoscience?
In two of his dialogues, Plato used it for the first time as a literary device. The late 19th century also saw the emergence of other tales about lost continents, like Mu and Lemuria.Learn more about pseudoscience
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What would you assume if you found rna transcripts of lactose-utilizing genes within e. coli?
Rna transcripts of lactose-utilizing genes within e. coli indicates the presence of lactose.
What is operon?
An operon is a collection of genes that all share a single promoter during transcription, found in bateria.There are regulatory DNA sequences in every operon, and these sequences serve as binding sites for regulatory proteins that either encourage or hinder transcription.Regulatory proteins frequently attach to tiny molecules, which can alter the protein's capacity to bind DNA and turn it on or off.Some operons are inducible, which means that a specific tiny molecule can activate them. Others can be turned off by a single molecule and are repressible, which means they are switched on by default.one example of operon is Lac operon of E. coli contains genes involved in lactose metabolism. It's expressed only when lactose is present and glucose is absent.Learn more about the Lac operon with the help of the given link:
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Why are temperatures more moderate around
the fall and spring equinoxes?
• The angle at which Earth's axis tilts changes.
• Neither end of Earth's axis is tilted toward the Sun.
© The north end of Earth's axis is tilted toward the Sun.
• The Earth briefly wobbles on its axis.
Answer:
The angle at which Earth's axis tilts changes.
Explanation:
As the axial tilt increases, the seasonal contrast increases and this subsequently results in winters getting colder and summers getting warmer in both hemispheres. The tilt is also responsible for various seasons that the Earth witnesses.
Temperatures are more moderate around the fall and spring equinoxes because neither end of Earth's axis is tilted toward the Sun during these times. Therefore, the correct option is B.
What are spring equinoxes?This occurs when the sun moves north across the celestial equator. During the fall and spring equinoxes, the Earth's axis is neither tilted away from nor toward the Sun, resulting in approximately equal amounts of daylight and darkness at all latitudes.
This means that the Sun's rays are hitting the Earth's surface more directly at the equator and at a more oblique angle at higher latitudes. This results in more moderate temperatures, as the temperature differences between the equator and higher latitudes are minimized.
The angle at which Earth's axis tilts changes over a long time period, which can lead to changes in climate patterns over thousands of years. Therefore, the correct option is B.
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In a classic experiment conducted by Cannon and Washburn (1912), they monitored stomach contractions and found them to be related to _____.
In a classic experiment conducted by Cannon and Washburn (1912), they monitored stomach contractions and found them to be related to hunger.
What is stomach contraction?Stomach, intestines, or abdominal muscles can constrict during a stomach spasm. It may feel like a tiny muscle twitch or stomach cramps, depending on which area of your body is spasming and how severely.Food is moved through the digestive tract by a sequence of wave-like muscle contractions called peristalsis. The process begins in the esophagus, where powerful waves of smooth muscle transport balls of swallowed food to the stomach.Primarily, hunger is a biologically induced urge for food, which is necessary for survival. So, it is possible to think of hunger as a biological characteristic of humans that can be measured and predicted in terms of appetite and food consumption.Nerve cells located in the hypothalamus are what cause the feeling of hunger when they are active.
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That's the essay i wrote and i need answers to the 3 questions at the end
the 3 answers should be 500 words. pls i need them fast its the last lesson
First of all this experiment was so interesting to me. It was really fun checking up every week to see what changes occurred to the flat head nail I placed in my backyard. it was even more fun because I left my home a couple of times to another state during the month so every time I left I was so excited to come back and see the changes. I placed my flat head nail in my backyard and actually I have a reason for choosing to place a flat head pin instead of anything else, and that's because I knew that the flat head pin would get rusty because of the automatic water sprayer that's placed in our backyard. And I really wanted to try to place the rusty flat head pin in the Pepsi to see if it really works to remove the rust from the flat head pin. And guess what? it worked! I was so happy when it worked.
The environment that I placed my flat head pin in was damp most of the time because of the automatic water sprayer, although it's really hot now in Cairo to a point that the temperature reaches 113 degrees or even higher sometimes, especially in the afternoon. The place where I placed my flat head pin had many types of insects and birds. I saw ants, grasshoppers, cockroaches, mosquitoes, bees, worms, geckos, and flies. In the first week, not many changes happened to the flat head pin that I placed, the only change that happened is that I saw some ants and flies standing on the flat head pin, but they were mostly ants. I also noticed that there was some soil on the tip of the flat head pin and that was all for the first week. In the second week, things started to be a bit interesting. I started seeing some rust already on the tip of the flat head pin! and the soil started to get even more moisturized because my dad increased the amount of water a little because the weather was really dry and some of the grass started to turn brown and dry. luckily after my dad did that the grass turned bright green again.
At the beginning of week 3, I left my house for 3 days. While I was out of town there was a stand storm that hit our area. After I came back I checked on the flat head pin to make sure that it was still there and thankfully it was but, it was soaked in sand from the sand storm. at the end of the week, I checked again and there were a lot amount of ants trying to pull the flat head pin to somewhere else but they failed. and after the ants got off the flat head pin I noticed that the flat head pin was covered in rust I came closer to smell it and it smelt like rusty water. I left town again the fourth and final week and when I came back the flat head pin was completely covered with rust and I noticed something weird there were no more ants at all stepping or even near the flat head pin. Finally, I tried to place the flat head pin in Pepsi and I was overjoyed that it worked.
Now that I'm done with the experiment. The kind of changes that I can see in a larger human construct, such as parking lots is that the changes I would witness would be that over time with the heat snow rain, and change of climate would make the lines on the ground of the parking lot would fade and lose its color and the insects over the time would eat the bits of rocks in the parking lots.
1. Extrapolate what you've witnessed to larger human constructs, such as parking lots or shopping centers.
2. What kinds of changes can you expect to happen based on what you've witnessed with your experiment? Be sure to mention both the outgoing and incoming organisms.
3.Explain how the water cycle would be affected by large areas of concrete. Include information about run-off and pollution along with infiltration to ground water.
From what was seen so far, it is right to extrapolate that over time across he world, that environmental and climatic factors will have a degrading impact on the aesthetics of the architecture that have been created around human constructs such as shopping centers, parking lots, and even human dwellings.
What kinds of changes can you expect to happen based on what you've witnessed with your experiment?The kind of changes to be experienced is that aesthetics such as branding signs, paintings, signs and signages and other physical amenities are subject to wear and tear.
Animals both macroscopic and and microscopic contribute to these factors. For example, just like the in the experiment, ants are seen burrowing into soil and soft rock.
Humans, on the other hands naturally, wear away physical amenities with use over time.
How will the water cycle would be affected by large areas of concrete?The simple version of the water cycle is such that:
Rain fall to the earth,The water is absorbed on the soilThe water is evaporated from the soil into the atmosphereBy convection, the water fall back again onto the earth.Because concrete cannot absorb water as much as soil, the water that falls on the concrete runs off.
Bacterial which usually reside on natural soil don't exist on concrete, hence rather than breakdown waste into biodegradable components of the ecosystem, waster are washed off into water bodies as they are.
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Which subtype of attention-deficit/hyperactivity disorder (adhd) includes six or more symptoms of inattention and six or more symptoms of hyperactivity-impulsivity?
Combination ADHD subtype of attention-deficit/hyperactivity disorder (adhd) includes six or more symptoms of inattention and six or more symptoms of hyperactivity-impulsivity.
What is combination ADHD?The neurobehavioral disorder ADHD, Combined Presentation is characterized by both hyperactivity and impulsivity (doing quick, impromptu behaviors like interrupting others).Blood relatives that have ADHD or another mental illness, like a parent or sibling. Exposure to environmental contaminants, primarily lead, which is present in older buildings' paint and pipes. Pregnancy-related drug, alcohol, or smoking usage by the mother birth before term.Although people with combined-type ADHD experience two distinct sets of symptoms, their ADHD is not necessarily worse than that of those who only experience one. People with combined-type ADHD can flourish in academic, professional, and social situations with the aid of medications and behavioral therapy.ADHD frequently manifests as mostly hyperactive-impulsive behavior or primarily inattentive behavior. Someone is diagnosed with mixed type ADHD if they exhibit six or more symptoms of each category.
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Zebrafish have been genetically engineered to glow in the dark. What can be gained from research like this? (3 points)
More knowledge of fish population dynamics
Increased understanding of how fish reproduce
Increased understanding of feeding behaviors
Knowledge about how genes work in vertebrates
The knowledge that can be gained from this is Knowledge about how genes work in vertebrates. Option D
What is genetic engineering?Genetic engineering has to do with the procedure by which the genetic composition of an organism is modified. This is often carried out in a laboratory so as to produce new species of an organism or for scientific research purpose. We know that interaction of genes is determined by Mendelian genetics and the patterns of inheritance have been the constant subject of study.
As such, if a Zebrafish have been genetically engineered to glow in the dark, the knowledge that can be gained from this is knowledge about how genes work in vertebrates. We know that fish is an aquatic vertebrate because it possesses back bone as does other vertebrates (presence of vetebral column).
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When an individual of childbearing age undergoes a diagnostic x-ray procedure, gonadal shielding should be used to protect the reproductive organs from exposure to the useful beam:__________
When an individual of childbearing age undergoes a diagnostic x-ray procedure, gonadal shielding should be used to protect the reproductive organs from exposure to the useful beam are When these organs are in or within approximately 5 cm of properly collimated x-ray beam and Unless shielding will compromise the diagnostic value of the examination.
What is x-ray beam?Electromagnetic emissions or particle emissions from the x-ray tube.The x-ray beam contains a wide variety of energies known as the x-ray emission spectrum and is polyenergetic (multiple energies). The lowest energies are consistently between 15 and 20 keV, while the greatest energies are consistently equal to the kVp set on the control panel.By speeding electrons across a potential difference and directing them toward a target material, X-rays are frequently created in X-ray tubes. As the incoming electrons slow down inside the target, they emit X-rays.A wide variety of commercial, medical, and scientific uses are made possible by the distinctive properties of X-rays, including their capacity to penetrate optically opaque materials, their atomic-scale wavelengths, and the high energy of individual X-ray photons.Learn more about X-ray here:
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Disclaimer: The given question in the portal is incomplete. Here the complete question.
Question: When an individual of childbearing age undergoes a diagnostic x-ray procedure, gonadal shielding should be used to protect the reproductive organs from exposure to the useful beam:
1. When these organs are in or within approximately 5 cm of properly collimated x-ray beam
2. Unless shielding will compromise the diagnostic value of the examination
3. When the radiographer chooses to substitute gonadal shielding for adequate collimation of the x-ray beam
Select the correct answer from each drop-down menu. gene expression in eukaryotes can be regulated at various levels. certain mutations in flies may cause them to develop an extra set of legs or wings. , which determine the formation and arrangement of body parts in multicellular organisms, control gene expression by regulation of .
This phenomenon makes reference to the control of gene expression by regulation of Hox genes.
What are Hox genes?The Hox genes are group a master regulator genes whose sequential expression determines the spatiotemporal development in many animal groups.
The Hox genes are expressed during developmental segmentation of arthropods in order to determine the formation of legs and wings.
In conclusion, this phenomenon makes reference to the control of gene expression by regulation of Hox genes.
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_______ fungi are those species that occur as either molds or yeast, depending on environmental conditions such as temperature and nutrient availability
Dimorphic fungi are those species that occur as either molds or yeast, depending on environmental conditions such as temperature and nutrient availability.
Dimorphic fungi are fungi that can exist in the form of both mold and yeast. This is usually brought about by change in temperature and the fungi are also described as thermally dimorphic fungi. An example is Talaromyces marneffei, a human pathogen that grows as a mold at room temperature, and as a yeast at human body temperature.
The term dimorphic is commonly used for fungi that can grow both as yeast and filamentous cells, however many of these dimorphic fungi actually can grow in more than these two forms. Dimorphic is thus often used as a general reference for fungi being able to switch between yeast and filamentous cells, but not necessary limiting more shapes.
Some diseases caused by this fungi are:
sporotrichosisblastomycosishistoplasmosiscoccidioidomycosisparacoccidioidomycosistalaromycosiscandidiasisSeveral species of dimorphic fungi are important pathogens of humans and other animals which includes :
Coccidioides immitisParacoccidioides brasiliensisCandida albicansBlastomyces dermatitidisHistoplasma capsulatumSporothrix schenckiiLearn more about Dimorphic fungi here : https://brainly.com/question/13051247
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In the apple maggot fly, rhagoletis pomonella, the frequency of certain alleles increases steadily as one goes from north to south. this is an example of:_______
In the apple maggot fly, the frequency of certain alleles increases steadily as one goes from North to South. This is an example of: Sympatric speciation.
Sympatric speciation is observed when there are no physical barriers which prevent any members of a species from mating with another, and all members are in close contact to one another. A new species, possibly established on a distinct food source or trait seems to develop instinctively.
The example of apple maggot fly supports a model for sympatric speciation in progress. Hawthorn is the native host for the apple maggot fly in North America. However, in the mid-1800s, a new population developed on introduced, domesticated apple.
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