Answer: A animal cell
Explanation:
How does seed-cutting differ from shelterwood cutting? a. shelterwood cutting removes all trees within a given area. b. shelterwood cutting takes place over several years. c. seed-cutting takes place over several years. d. seed-cutting is more damaging to the natural environment. please select the best answer from the choices provided a b c d
The correct answer is (b) Shelter wood cutting takes place over several years
What is Shelter wood cutting?
Shelter wood cutting is the progressively cutting of the forest, in order to establish the growth of the new generation of the seedlings of a particular species without planting.An even-aged method of establishing and fostering desired natural regeneration is shelter wood harvesting. More sunlight reaches the forest floor to encourage seedling development by removing a mature stand in two to three cuts over five to twenty years.What is a seed tree cut?
A kind of cut when only the trees required for regeneration and reserve trees are removed. produces a new age class and prepares the seed bed for the seed-tree or shelter wood regeneration process in an even-aged or two-aged stand.What is shelter wood cutting pros and cons?
Cutting shelter wood is a more environmentally friendly method of tree harvesting. Clear cutting, however, can provide more resources and is quicker. However, during clear-cutting, the chosen forest is completely destroyed, and everything in the way is removed (including animals).Learn more about Shelter wood cutting
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In gluconeogenesis, organisms use atp to make glucose, then in cellular respiration they break down the glucose again to get energy. why not just store the atp? (select all that apply. )
In gluconeogenesis is synthesis of new glucose from noncarbohyhate precursors, provides glucose when dietary intake is sufficient.It is essential for regulation of acid base balance,amino acid metabolism and synthesis of carbohydrates.
It is the process of glucose synthesis. Glycoysis run backwards, three new reaction happen which involve new enzymes , make the standard free energy favorable. When every molecule of glucose synthesis from two molecules of pyruvate , 4ATP, 2GTP, 2NADH are used.
When the energy charge of the cell drops, the cell begins producing more ATP by glycolysis and turn off gluconeogenesis to conserve the ATP molecules.This process are stimulated and inhibited by similar allosteric effectors that bins to specific site on enzymes.
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what is enviroment and its importance?
the earth is the home of human being and other living organism this is possible due to the princess of favourable living condition which make up their environment.
the term environment refer to all external condition in which and living organism leave it come from the French word environ which mean to surround.
the significant environment charge that have occur during the earth history are surveyed in article geochronology.
environment are two types natural environment and human environment natural environment include and organism physical and biological environment also consist physical and environment and biological environment and human environment is formed by human being he is creation such as road are the social economic political other condition which he lives.
Where does cellular respiration take place?
A. Chloroplasts
B. Mitochondria
C. Cytoplasm
D. Lungs
B. Mitochondria
The process of cellular respiration is essentially when oxygen and carbon transfuse themselves together to create carb on dioxide, which in turns creates energy.
The entire process is formed in the powerhouse of the cell, or in other words, the mitochondria.
A part of this question that may have been confusing is the answer, "lungs". Since respiration is correlated to the lungs, you may have been confused. However, this is a process that occurs within your cells, so on a small scale than your entire body.
Water-storing plants and deeply rooted shrubs are plants that characterize?
Desert vegetation or xerophytes includes bushes with deep roots and plants that store water.
Another name for desert plant:
A plant species known as a xerophyte has evolved to live in environments with little fluid water, like a desert or an area surrounded by ice or frost in the Mountains or the Polar regions. Cacti, pineapples, and various Gymnosperm species are a few well-known instances of xerophytes.
Xerophytes have different adaptations to their morphological characters (morphology) and basic physiological functions (physiology) that allow them to store significant amounts of water and save it during dry seasons. During prolonged periods of severe dehydration or evaporation of their organs, some creatures can live, and at those times, their biochemical function may cease. Xeromorphic flora has such biological and morphological modifications.Learn more about xerophyte here:
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What evidence does the dische test provide that helps confirm that dna was extracted from the strawberries. Why do you think it is relatively easy to isolate dna from strawberries?.
Ripe strawberries are a perfect reference for extracting DNA because they are easy to pulverize and include enzymes called pectinases and cellulases that help to crack down cell walls. And most significant, strawberries have eight documents of each chromosome (they are octoploid), so there is a lot of DNA to separate.
What is extract DNA?Celebrate the line between the strawberry combination and the alcohol. You will witness a white thread-like cloud occurring at this line. This is strawberry DNA. The DNA will clump together and float to the lid of the alcohol layer.The capacity to extract DNA is of immediate importance to studying the hereditary causes of disease and for the development of diagnostics and drugs. It is also important for taking out forensic science, sequencing genomes, detecting bacteria and viruses in the atmosphere, and determining paternity.The purposes of this experiment are to extract DNA from a fruit selection, test the wetness of a soil sample, and complete blood typing and gel electrophoresis. The DNA will be removed using the basic biochemical techniques for separating, refining, and digesting DNA molecules.To learn more about DNA, refer to:
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Mary is campaigning for improved air quality in her city. she is very concerned about carbon and methane outputs, but not phosphorous. why is that?
In her city, Mary is advocating for better air quality. She is really worried about emissions of carbon and methane but not phosphorous. She believes that phosphorus improves the quality of the air.
Why does methane cause so much global warming harm?Methane reacts in a number of dangerous ways as it is released into the atmosphere. For starters, methane typically exits the atmosphere through oxidation, when it is converted to carbon dioxide and water vapor. Methane, therefore, not only directly but also indirectly through the emission of carbon dioxide, contributes to global warming.Why is the problem of carbon emissions?CO2 emissions trap heat in the atmosphere like a blanket, warming the planet as a result. The Earth cannot cool due to this layer, which results in an increase in global temperatures. Sea levels, weather patterns, food and water supply, and environmental conditions would all be impacted by global warming.The benefits of phosphorus on the environmentFor plants and animals to flourish and for agricultural and livestock production to remain viable, phosphorus (P) is a crucial ingredient. Eutrophication, the natural aging process that lakes or streams go through as a result of nutrient enrichment, is another way that it might boost the biological productivity of surface waters.learn more about phosphorous here
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Answer:
Phosphorous is most commonly found as phosphate rock
Explanation:
Firefighters should wear scba in hazardous atmospheres, because exposure to particulate contaminants such as _____ can cause lung cancer or cardiovascular disease.
Firefighters should wear scuba in hazardous atmospheres because exposure to particulate contaminants such as smoke can cause lung cancer or cardiovascular disease.
What are particulate contaminants?Particulate contaminants are macro or microscopic solid or liquid materials that float in the atmosphere. When these materials are present in an amount capable of causing a health hazard, they are described as pollutants.
Examples of particulate contaminants are smoke, dust, ashes, etc. They constitute health hazards when inhaled and bioaccumulated to a certain level in the body.
Some of the health hazards they constitute include cancer, cardiovascular problems, kidney problems, etc.
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When this ring is compromised, the gel-like nucleus, which is called the ________________ can ooze out and compress the spinal cord or a spinal nerve
Answer:
Nucleus Pulposus
Explanation:
The intervertebral discs are the shock-absorbing cushions between each pair of vertebrae in your spine. Each disc has a strong outer ring of fibers, called the annulus, and a soft, gelatinous center, called the nucleus pulposus.
Classify invertebrates in this table with all the correct information.
The invertebrates from the table above is correctly classified below:
Invertebrates Phylum
Anemones Cnidaria
Butterfly Arthropoda
Clam Mollusca
Coral Cnidaria
Crab Arthropoda
Earthworm Annelida
Grasshoppers Arthropoda
Hydra Cnidaria
Jellyfish Cnidaria
Lobster Arthropoda
Mussel Mollusca
Nematode Nematoda
Octopus Mollusca
Planaria Platyhelminthes
Scorpion Arthropoda
Grasshoppers are invertebrates which belong to the phylum Arthropoda
Classification of grasshopper:
Phylum: Arthropoda
Sub-phylum: Hexapoda
Class: Insecta
Body symmetry: Bilateral symmetry
Characteristics: Below are some of the characteristics of grasshopper
They have three body regionsThey posses three pairs of legsThey have one pair antennaeTracheal system is presentWhat are invertebrates?Invertebrates are animals without backbone.
Below are some invertebrate phyla:
PoriferaCnidaria or coelentrataAnnelidaNematodaEchinodermataMolluscaArthropodaLearn more about invertebrates:
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An ion that has two or more electrons outside the nucleus than there are protons in the nucleus will have a charge of:______
An ion that has two more electrons outside the nucleus than there are protons in the nucleus will have a -2 charge.
An atom or molecule with a net electrical charge is known as an ion. Conventionally, the charge of an electron is thought to be negative this charge is equal to and opposite to the charge of a proton, which is thought to be positive. These ions allow electrical messages to move freely throughout the body. Electrolytes are essential to the body because they control osmotic pressure in cells and support the health of muscle and nerve cells.
Protons dominate electrons in a positively charged ion or cation. The atomic number of the element is represented by the proton number, while the electron number is the atomic number less the charge. An anion or ion with a negative charge has more electrons than protons. The atomic number is once more equal to the number of protons.
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3. Put the steps of this co-evolution in order based on how you think the evolutionary steps would go by writing numbers 1 through 7 to the left of the explanation. Be sure to look at some examples of co-evolution before you begin! Explain your reasoning.
Coevolution is the evolutive and adaptative relationship between two species that interact. Simultaneous evolution and adaptation depend on this interaction. 1,G). 2,D). 3,C). 4,B). 5,F). 6,A). 7,E)
What is coevolution?Coevolution is the biological relationship between two or more species that interact and adapt to each other. Coevolution is the mechanism that explains the occurrence of coadaptation.
Coadaptation is the reciprocal genetic changes in species that interact due to the selective pressures that each species impose on the other.
Coadaptation is what can be seen or observed.
For coevolution to occur, there must be phenotypic variation and heritability.
Acording to this framework, the steps is order are
1-G) The anteater becomes specialized to eat only ants
2-D) Ants burrow into the ground to scape the anteater
3-C) The anteater digst to reach the ants. A longuer tongue is useful
4-B) Ants burrow deeper into the ground to scape the anteater
5-F) The anteater digst to reach the ants. A longuer tongue is useful
6-A) Ants develope complex cave systems to scape the long reach of anteaters
7-E) Selection for long tongue and nose allows anteater to still reach ants.
Anteater becomes specialized in eating only antsSince anteater becomes specialized, ants need to burrow into the ground to scape.Since ants are hiden underground, anteater digs and deveolpe a long tongue to access ants.Ants need to dig deeperAnteater still can get to the ants by using its tongue and diggingAnts create cave systems to scapeAnteater developes smell and uses its tongue to detect ants in the caves.The anteater develops structures and mechanisms to hunt ants. As a response, ants develope strategies to scape from the predator.
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How many protons are translocated across the inner mitochondrial membrane by complex iv for every pair of electrons passing through the electron transport chain?
Two protons are translocated across the inner mitochondrial membrane by complex iv for every pair of electrons passing through the electron transport chain.
What is inner mitochondrial membrane?The mitochondrial membrane that divides the intermembrane gap from the mitochondrial matrix is known as the inner mitochondrial membrane (IMM).As a result, the inner mitochondrial membrane maintains the proton gradient that powers oxidative phosphorylation and serves as a functional barrier to the passage of tiny molecules between the cytosol and the matrix.Cristae are the name for the inner membrane folding of mitochondria. They broaden the surface.The inner or cytoplasmic membrane controls the flow of nutrients, metabolites, macromolecules, and information into and out of the cytoplasm and preserves the proton motive force necessary for energy storage. It is impermeable to polar molecules. The inner membrane of E is connected to more than 100 distinct proteins.Similar to the cell membrane, the mitochondrial inner membrane is mostly composed of a phospholipid bilayer. Several proteins that function to carry out the electron transport chain are embedded in this bilayer. The membrane's surface area is increased by folds called christae.Learn more about inner mitochondrial membrane here:
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An igneous rock has large red, black, and green crystals. How else can this rock be accurately described? Fine texture cooled quickly intrusive origin created by lava
Igenous rocks are created by lava colling and cristalization. They can be either intrusive (slow cooling) or extrusive (fast cooling). The option that includes all ingeous rocks is D). created by lava.
What is an igneous rock?Igenous rocks come straight from the interior of the Earth.
A liquid mass of silicate composition coming from the Earth's core erupts out of a volcano as lava.
Since this melted mass comes from the Earth's interior, its temperature is extremely high.
Lava begins to cool and solidify during its ascent to the Earth's surface.
Igneous rocks are produced by the magma cooling and cristalizing when they get in touch with air.
Thre are two types of igneous rocks
• plutonic rocks ⇒ close to the terrestrial crust ⇒ intrusive ⇒ slow cooling
• volcanic rocks ⇒ on the surface ⇒ extrusive ⇒ quick cooling
Among the options, there are three descriptions that match the igneous rocks,
cooled quickly ⇒ this is the case of extrusive rocks, when lava gets in contact with cold air and quickly cristalizes.intrusive origin ⇒ this is the case of magma that slowly cristalizes near the crustcreated by lava ⇒ this is the case of all igneous rocks.If we need to find only one of these options, we could choose option D, created by lava, since it involves all types of ingeous rocks.
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Among ethnic groups in the united states, _____ have high death rates for stroke, heart disease, lung cancer, and female breast cancer.
Among ethnic groups in the united states, African Americans have high death rates for stroke, heart disease, lung cancer, and female breast cancer.
Reasons include:
Shortage of black male doctors having a public health impact.Heart disease develops earlier and deaths from heart disease are higher in blacks, due in part to risk factors such as high blood pressure, obesity, and diabetes.African American women being more likely to be diagnosed at a later stage of disease, when treatment is less likely to be successful, be diagnosed with triple-negative breast cancer, a biologically aggressive form of breast cancer.To learn more about Ethnic group cancers ,here
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The arrival of a nerve impulse at the synaptic knob of a motor neuron causes synaptic vesicles to release _____ into the synaptic cleft.
A Final statement or concluding statement
The arrival of a nerve impulse at the synaptic knob of a motor neuron causes synaptic vesicles to release acetylcholine into the synaptic cleft.
What is released by synaptic knob?A neurotransmitter-containing membrane-enclosed vesicle fills the synaptic knob. The synaptic knob's arrival of an action potential opens [tex]Ca^{2+}[/tex] channels in the plasma membrane. Some of the vesicles undergo exocytosis in response to the [tex]Ca^{2+}[/tex] influx. The synaptic cleft receives the discharge of their neurotransmitter. The receptors on the postsynaptic membrane are where the neurotransmitter molecules bind. These receptors are ion channels that are ligand-gated.
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Which nerve is responsible for taste as well as salivation in the anterior oral cavity?
The chorda tympani gives a taste sensation. Salivation in response to oral food is based on visceral reflex arcs within the facial or glossopharyngeal nerve.
The chorda tympani gives taste sensation whereas glossopharyngeal nerve is responsible for mouth salivation.
The submandibular and sublingual salivary glands are innervated by preganglionic parasympathetic nerve fibers that are carried via the chorda tympani, which also gives taste sensation from the front 2/3 of the tongue. There are two cranial nerves that innervate the tongue and are used for taste: the facial nerve (cranial nerve VII) and the glossopharyngeal nerve (cranial nerve IX).
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The ________ are characterized by having; average diameter of 30 µm, thin adventitia, and often an incomplete media.
Answer: venules
Explanation:
Chris and his friends go swimming in a local river. Afterward, his friends break out with a rash, but he does not. The group soon discovers the river has toxins in it from a nearby factory. Chris's doctor determines that Chris did not react to the toxin because his daily medication combined with the toxin to stop the reaction. Which statement best explains why Chris did not get a rash from the water, but his friends did?
Chris's reaction is chronic and has a synergistic relationship with the toxin.
Chris's medication has an antagonistic relationship with the toxin in the water.
His friend's reaction is acute and reveals an antagonistic relationship with the toxin.
Chris's medication has a synergistic relationship with the toxin in the water.
The statement that best explains why Chris did not get a rash from the water was that Chris's medication has an antagonistic relationship with the toxin in the water. That is option B.
What is drug-drug interaction?Drug-drug interaction is definitely as the relationship that exists between two drugs when administered together or at the same time.
This relationship that exists between the drugs could be:
Synergistic relationship orAntagonist relationship.A synergistic relationship is the type of relationship that occurs between two drugs where by the total effect of the drugs are greater than the sum of the individual effects of each drug.
An antagonistic relationship is the type of relationship that occurs between two drugs where by the both drugs has opposite effects on the body.
Therefore, Chris didn't have the rash because his medication has an antagonistic relationship with the toxin in the water.
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The reason why Chris did not get a rash from the water, but his friends did is that Chris's medication has a synergistic relationship with the toxin in the water.
What is a toxin?A toxin is any subsistence which is able to interact with the body cells in a way that could cause overall harm to the body. Toxins may be waste materials from factories or substances that are extracted from living things.
In any case, the common factor that underlies every material that is referred to as a toxin is the fact that it is able to cause harm in the body.
Thus, the reason why Chris did not get a rash from the water, but his friends did is that Chris's medication has a synergistic relationship with the toxin in the water.
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When a cold front is approaching, what happens?
Select one:
a.
Warm air is pushing under cold air causing humid weather and lower temperatures.
b.
Warm air is pushing under cold air causing humid weather and higher temperatures.
c.
Warm air rises, cools, and causes rain and thunderstorms.
d.
Cold air is pushed over warm air causing rain and thunderstorms.
Describe the structure and function of mirna, snrna, and lncrna, which represent the three major types of noncoding rnas. What are four mechanisms by which lncrna molecules are thought to regulate cellular processes?.
Structure and function of miRNA:
A microRNA (abbreviated miRNA) is a small single-stranded non-coding RNA molecule, containing about 22 nucleotides found in plants, animals and some viruses, that functions in RNA silencing and post-transcriptional regulation of gene expression. miRNAs function via base-pairing with complementary sequences within mRNA molecules. As a result, these mRNA molecules are silenced, by one or more of the following processes: cleavage of the mRNA strand into two pieces, destabilization of the mRNA through shortening of its poly(A) tail, and less efficient translation of the mRNA into proteins by ribosomes.Structure and function of snRNA:
Small nuclear RNA (snRNA) is a class of small RNA molecules that are found within the splicing speckles and Cajal bodies of the cell nucleus in eukaryotic cells. The length of an average snRNA is approximately 150 nucleotides. They are transcribed by either RNA polymerase II or RNA polymerase III.Their primary function is in the processing of pre-messenger RNA (hnRNA) in the nucleus. They have also been shown to aid in the regulation of transcription factors (7SK RNA) or RNA polymerase II (B2 RNA), and maintaining the telomeres. snRNA are always associated with a set of specific proteins, and the complexes are referred to as small nuclear ribonucleoproteins, snRNP, often pronounced "snurps". Each snRNP particle is composed of a snRNA component and several snRNP-specific proteins.Structure and function of lncRNA?
Long non-coding RNAs (long ncRNAs, lncRNA) are a type of RNA, generally defined as transcripts more than 200 nucleotides that are not translated into protein. This arbitrary limit distinguishes long ncRNAs from small non-coding RNAs, such as microRNAs (miRNAs), small interfering RNAs (siRNAs), Piwi-interacting RNAs (piRNAs), small nucleolar RNAs (snoRNAs), and other short RNAs. Long intervening/intergenic noncoding RNAs (lincRNAs) are sequences of lncRNA which do not overlap protein-coding genes.Four mechanisms by which lncRNAs molecules are thought to regulate cellular processes are:
The majority of lncRNAs are transcribed by RNA polymerase II, as evidenced by PoI-I occupancy, 5‘ caps, histone modifications associated with Pol-II transcriptional elongation, and polyadenylation.lncRNAs play a key regulatory role in the p53 transcriptional response. One of the direct p53 targets in response to DNA damage, a lncRNA called linc-p21 located upstream of CDKN1A gene, was found to act as a transcriptional repressor in the canonical p53 pathway and to play a role in triggering apoptosis. p53 regulates linc-p21 by directly inducing its expression, likely through direct binding to the linc-p21 promoter, while reduction of lincRNA-p21 increases expression of numerous p53-repressed transcripts.Pluripotency-associated lincRNAs were initially discovered in mouse embryonic stem cells. Somatic cell reprogramming to induced pluripotent stem cells (iPSCs) is accompanied by enriched expression of large intergenic non-coding RNAs (lincRNAs).The phenomenon of combinatorial transcriptional regulation by lncRNAs is also found in plants. The transition from vegetative to reproductive development is a highly regulated process that, in many plant species, is sensitive to environmental cues that provide seasonal information to initiate flowering during optimal times of the year.To learn more about lncRNA:
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Which result is consistent with the intestine actively transporting glucose from mucosal to serosal side, with a critical need for an apical sodium/potassium atpase?
The result consistent with the intestine actively transporting glucose from mucosal to serosal side, with a critical need for an apical sodium/potassium ATPase is that the glucose concentrations are higher on the serosal than mucosal at the end of the experiment unless ouabain is applied to the apical side.
The small intestine epithelium is electrogenic in its glucose absorption. The Na+/glucose cotransporter (SGLT1), although glucose transporter type 2 (GLUT2) may also be involved, is the main pathway for the transportation of dietary glucose from the intestinal lumen into enterocytes.
The steroid hormone ouabain is an alpha-L-rhamnosyl cardenoloide that has undergone multiple hydroxylation. It attaches to and prevents the sodium/potassium-ATPase in the plasma membrane. The binding reduces the enzyme's activity, which modifies the cell's transmembrane electrochemical potential.
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Paroxysmal dyspnea, accompanied by wheezing caused by a spasm of the bronchial tubes or by swelling of the mucous membrane, is known as?
Paroxysmal dyspnea and wheezing are symptoms of chronic asthma and are caused by swelling of mucous membrane or bronchial tube spasm.
Your airways may narrow, swell, and create additional mucus if you have asthma. This may make breathing challenging and cause coughing, wheezing when you exhale, and shortness of breath.
Although there is no known therapy for asthma, you can manage it with treatment and an action plan. Monitoring, avoiding triggers, and taking medications are all possible parts of the approach.
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The cornea:________
a. is highly vascular.
b. is part of the focusing system of the eye.
c. is white like the rest of the sclera.
d. maintains the shape of the eye.
e. does not contain connective tissue.
The cornea (d) is part of the focusing system of the eye.
What is cornea?
The part of the eye that is a transparent avascular tissue that acts as a structural barrier and protects the eye against infections.The cornea is horizontally oval, measuring 11–12 mm horizontally and 9–11 mm vertically. The average corneal horizontal diameter is 11.71 ± 0.42 mm. The corneal diameter ranged from 11.04–12.50mm in males and 10.7–12.58mm in females. The limbus is widest in superior and inferior cornea. Cornea is convex and aspheric. The anterior curvature is 7.8 mm and posterior curvature is about 6.5 mm.It provides proper anterior refractive surface for the eye. Cornea contributes to two-third of the refractive power of the eye. Cornea contributes to about 40–44 D of refractive power and accounts for approximately 70% of total refraction. The refractive index of cornea is 1.376.To learn more about cornea: https://brainly.com/question/6848649
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If plaque ruptures and weakens the artery walls, a(n) _______________ may form leading to ischemia
In a typical monohybrid cross, all of the offspring in which generation will exhibit a single trait without blending?
In F1 mono-hybrid cross, all of the offspring in which generation will exhibit a single trait without blending. It is one parents id homozygous for one allele, and other parents is homozygous for the allele.
Mono-hybrid cross used to identify the dominance relation between two alleles. The hybrid of two organism with homozygous genotype which result in the opposite phenotype for genetic trait.
Mendel start this with the pair of pea plant by two contrasting trait such as tall and other one is dwarf. The cross pollination with each other which resulted that all plants are tall and this is called first hybrid generation or F1 progeny.
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Ion exchange molecules in the plasma membrane of the parietal cells exchange __________ ions going out for __________ ions coming in.
Ion exchange molecules in the plasma membrane of the parietal cells exchange "bicarbonate ions" ions going out for "chloride" ions coming in.
What is plasma membrane?The semi-fluid living substance known as protoplasm, also known as plasm, is found inside each cell. This biological membrane, known as the plasma membran, houses the living material or plasma.
The plasma membrane is made up of lipids and proteins, just like every other cellular membrane. The phospholipid bilayer, which creates a permanent separation between two aqueous compartments, is the membrane's basic structural component. These divisions are the inside and exterior of the cell in the situation of the plasma membrane. The particular tasks of the plasma membrane, such as the selective transport of chemicals and cell-cell recognition, are carried out by proteins embedded inside the phospholipid bilayer.It supports the body's pH balance, blood volume, blood pressure, immunity, and blood coagulation.To know more about plasma membrane, here
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Determine if the following statement is true or false, and why. "All mutations are harmful and increase the risk of diseases
such as cancer."
A. True
B. False, it should read "Some mutations may be harmful and increase the risk of diseases such as cancer, but many are beneficial"
C. False, it should read "All mutations are beneficial"
D. False, it should read "Some mutations may be beneficial, but many are harmful and increase the risk of diseases such as cancer."
A mutation is a change in the DNA sequence that can be either beneficial or harmful. 1) B, false.
What is a mutation?A mutation is a stable and hereditably change in the genetic material that introduces new variants.
These changes are unpredictable, and occur due to the action of mutagenic agents that alter DNI sequences.
Different mutagenic agents cause changes in genetic information, increasing mutations over the normal level.
Mutagenic agents cause changes in the base sequences and pairing.
Many of these mutations are eliminated, but some might succeed and be incorporated into each individual, getting to even affect the entire species.
These mutations are the ones that have been selected by natural selection.
Mutations depend on environmental conditions and ecological pressures, and accumulate in time. Mutations can be damaging or beneficial to the organism and might be inheritable or not.
Those favored by natural selection are inherited by the following generations and get to spread.
The statement is False, Option B.
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Answer: False, it should read "Some mutations may be harmful and increase the risk of diseases such as cancer, but many are beneficial"
Explanation: Not all mutations are harmful because some are useful and help many
Dna profiling relies on an individual's ________, no two of which are the same between different people, except identical twins
DNA profiling relies on an individual's unique set of short tandem repeats within DNA. no two of which are the same between different people, except identical twins.
What is DNA?Deoxyribonucleic acid is a polymer made of two polynucleotide chains that coil around one another to form a double helix and which contains the genetic material necessary for all known creatures, including many viruses, to develop, function, grow, and reproduce. Nucleic acids include DNA and ribonucleic acid.The molecule that carries the genetic information required for an organism to grow and function is called deoxyribonucleic acid, or DNA.The structure of DNA is a double helix, which is made up of two connected strands that loop around one another to resemble a twisted ladder.The instructions required for a creature to grow, endure, and reproduce are encoded in its DNA. DNA sequences must be transformed into messages that can be utilized to create proteins, which are the complex molecules that carry out the majority of the work in our bodies, in order to perform these activities.
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What is the chief benefit of using a high and low x-ray energy source with a dxa system?
The chief benefit of using a high and low x-ray energy source with a dxa system is to demonstrate attenuation differences between bone and soft tissue.
A DXA scan typically aids a physician in determining bone density. It might also be useful for figuring out body composition, like the ratio of lean muscle to fat. Two low-energy X-ray beams are used in the dual-energy X-ray absorptiometry (DXA) scan. This enables the picture to display both bone and soft tissue.
A DXA scan is usually more accurate than a standard X-ray when doctors need to determine whether a patient has low bone density or whether the problem is worsening since it may spot even minute changes in bone loss. The amount of visceral fat that the body accumulates around particular internal organs can also be estimated using the data.
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