Amphibians are referred to as the "planet's greatest survivors" because they have repeatedly avoided extinction over the course of 400 million years.
How did the amphibians survive?
Over the years, the amphibians have had to adapt to various surroundings. Small animals called amphibians require water or a moist environment to exist. This group of species includes newts, salamanders, toads, and frogs. All have extremely thin skin that allows them to breathe and absorb water. Additionally, amphibians have unique skin glands that create functional proteins.
According to fossil evidence, amphibians descended from lobe-finned lungfish about 365 million years ago. They were very successful since they were the first terrestrial vertebrates. Some of them were considerably bigger than modern-day amphibians. The predominant group of land vertebrates for more than 100 million years was amphibians.
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Ozone depletion can have negative
effects on both man-made and natural
systems. Which of the following is NOT
an effect of ozone depletion on natural
systems?
A. reduced photosynthesis
B. increased biodiversity
C. reduced growth
D. reduced flowering
Answer:
B. increase biodiversity
It can't increase the biodiversity it can effect the biodiversity
What layer of blood vessels is responsible for vasodilation and vasoconstriction as a result of sympathetic activation?
Tunica media is the layer of blood vessels responsible for vasodilation and vasoconstriction as a result of sympathetic activation.
What effect does tunica media have on blood pressure?
The cardiovascular system includes tubular organs called blood vessels that move blood across the body. The organ that provides the pressure required to force the blood through the vessels is the heart. In contrast to veins, which carry blood back to the heart, arteries carry blood away from the heart. The vascular wall of arteries and veins has three layers. The innermost layer of the tunic is called the tunica intima, followed by the middle layer, the tunica media, and the outer layer, the tunica adventitia.
Smooth muscle and elastic connective tissue make up the tunica media. When it comes to the upkeep of blood pressure, this layer is the most important of the three. As blood is forced out of the heart, the elastic fibers in this layer can withstand the strain applied to the blood artery. The elastic fibers apply the force back onto the blood when the heart relaxes, keeping blood pressure and flow during diastole.
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By the time the fertilized egg reaches the uterus it is a hollow ball of cells called a:________
By the time the fertilized egg reaches the uterus it is a hollow ball of cells called a: Morula
This collection of cells, known as a morula, resembles a little ball by the time it reaches the uterus. The morula develops a hollow interior and fills with fluid to produce a blastocyst. The blastocyst will cling to the endometrium, the uterus' lining, by the end of this week. The term for this is implantation.The zygote, which comes before the blastocyst, is split into the morula, a solid mass with 16–32 blastomeres. At the 8-cell stage, a process known as compaction starts, in which the spherical, loosely linked blastomeres take on a flattened polarized cell shape.learn more about morula here: https://brainly.com/question/11893522
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A pharmaceutical company went bankrupt after investing in what they thought was a highly promising leptin-like drug for obesity. Their fatal mistake was not hiring and consulting you during drug development. What could you have told them to avert their demise?
Answer choices:
Their drug wasn't strong enough because it was oral and not intravenous
Leptin can't be given as a drug because it's a hormone
Suppression of appetite is not sufficient for reversing obesity
Leptin insensitivity is commonly associated with obesity
Orexin exists to counteract any leptin you introduce
Answer:
Suppression of appetite is not sufficient for reversing obesity I believe
Explanation:
The dna double helix is made up of two strands of ______ monomers oriented in opposite directions. multiple choice question.
The DNA double helix is made up of two strands of nucleotide monomers oriented in opposite directions. multiple choice question.
DNA nucleotides link up to form units referred to as base pairs, A with T and C with G. A sugar and phosphate molecule are also joined to each base. A nucleotide is made up of a base, a sugar, and a phosphate. The double helix is a spiral formed by two long strands of nucleotides.The information molecule is DNA. It contains information needed to create proteins, which are other big molecules. These instructions are dispersed throughout 46 lengthy structures called chromosomes that are found inside each of your cells. Numerous smaller pieces of DNA, known as genes, make up these chromosomes.learn more about DNA here: https://brainly.com/question/16099437
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In what order does air inhaled through the nose travel, from superior to inferior?
nasopharynx, oropharynx, laryngopharynx in these order does air inhaled through the nose travel, from superior to inferior.
What is nasopharynx?Behind the nose, the top of the throat. The nasopharynx has a passageway leading into each ear on either side.The top section of the throat (pharynx), which is located behind the nose, is known as the nasopharynx. It is a box-shaped chamber with edges that are one and half inches wide. It is located just behind the nasal passages and above the soft palate, which is the soft portion of the roof of the mouth.A uncommon kind of cancer that affects the portion of the throat that connects the back of the nose to the back of the mouth is called nasopharyngeal carcinoma (the pharynx). Each year, 260 persons in the UK are given a nasopharyngeal cancer diagnosis.Nasopharynx's primary job is to join the remainder of your respiratory system to your nasal passageways. As a result, air can pass easily from your nose to your lungs. Nasopharynx is also beneficial: Maintain proper pressure between your middle ear and nasopharynx.
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Cytochrome c is an iron-containing enzyme found in the cells of all aerobic organisms. if cytochrome c is 0. 43e by mass, what is its minimum molecular weight?
Let the molar mass be =M.
If 0.43% Fe has molar mass=100 g.
Then, 56 g Fe has molar mass=100×56÷0.43 =13023.26=13Kg mol −1 .
Cytochromes are electron-transporting protein pigments concerned with cell respiration that contain an iron-containing molecule called heme, true to that of hemoglobin. When the iron of heme accepts an electron , it changes from the oxidized ferric (Fe III) state to the, reduced ferrous (Fe II) state. oxidation of cytochromes to molecular oxygen and their subsequent reduction by oxidizable substances in the cell is the main way in which atmospheric oxygen enters into the metabolism of the cell. About 90% of all oxygen consumed is mediated by the cytochromes.
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You see a bee pollinating a flower. This is an example of which ecosystem service?
Bee pollination is an example of regulating ecosystem services.
Ecosystem services provide beneficiaries for the living of human beings.The most significant services including providing provisionals( food), regulating the essential process for the ecological balance.Bee pollination in natural and agricultural ecosystem supports the food production and regulating the genetic flows in plant species.Learn more about ecosystem services on https://brainly.com/question/8513228
If a gene exists in 10 different alleles in a population, how many alleles can be expressed in one diploid cell?
If a gene exists in 10 different alleles in a population, two alleles can be expressed in one diploid cell.
What is a diploid cell?
The term "diploid" describes an organism's cells having two full sets of chromosomes, with one chromosome from each parent present in each pair. Since humans are diploid, the majority of their cells have 23 pairs of chromosomes. However, human germ cells (egg and sperm cells) are referred to as haploid since they only have one pair of chromosomes.
Two full sets of chromosomes are present in a diploid cell. The majority of human cells are diploid, with 23 chromosomal pairs totaling 46 chromosomes. This comprises a pair of sex chromosomes and 22 pairs of autosomes. The mother and father each contributed one replica of each pair of chromosomes to the person.
We have two copies of every gene because we have two copies of each chromosome. The majority of mammals, including humans, are diploid, however certain creatures are polyploid or have more than two sets of each chromosome. Consider the octoploid nature of your typical supermarket strawberry, which has eight complete sets of seven chromosomes apiece for a total of 56 chromosomes.
Therefore, two alleles can be expressed in one diploid cell, if a gene exists in 10 different alleles in a population.
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ASAP PLS
Whales have small, shrunken hip bones that do not connect to an actual leg or appendage sticking out of the body. What is the purpose of these hip bones?
A. They are only present in whales whose DNA mutated after encountering
an oil spill.
B. None of these.
C. They no longer have a purpose but indicate whales evolved from 4 legged animals.
D. They are used to help the whale keep its balance while diving.
Whales have pelvic (hip) bones, which are evolutionary remains from when their forefathers walked on land about 40 million years ago. Common belief has long assumed that such bones are merely vestigial, slowly withering away like human tailbones. Thus option C is correct.
What is the new research from USC and the Natural History Museum of Los Angeles County (NHM) has to say ?New research from USC and the Natural History Museum of Los Angeles County (NHM) contradicts this belief, discovering that not only do those pelvic bones have a role, but their size and perhaps shape are impacted by sexual selection processes.
Therefore, small, shrunken hip bones of whale are no longer beneficial for survival and are considered vestigial. So, the best option is C among the other options available. Thus option C is correct.
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Food processing and the absorption and distribution of nutrients within your body are mainly accomplished by which system? (choose all that apply)
Answer:
Digestive system is the main system, then lymphatic and circulatory systems.
Which of the following are outcomes of refrigeration?
I. Less food waste
II. More food variety
III. Food lasts longer
A. I, II, and III
B. I and II
C. II and III
D. III only
Answer:
I'm pretty sure it's a. With refrigeration you do have more food variety, the food lasts longer so less waste.
Harold’s wonders how much of a role genetics plays in determining his weight. He has heard about a gene, called leptin. Mice with a defective form of the leptin gene tend to?
Weight is a quantitative trait and mice with defective leptin tend to have problems controlling weight since this gene is associated with it.
What is a quantitative trait?A quantitative trait is a phenotypic feature controlled by many genes and the interaction with the environmental factors.
Weight, height, behavioral features are all examples of quantitative traits because these types of phenotypic features show continuous variation.
Quantitative traits are modulated by gene interactions and therefore exhibit both epistatic and pleiotropic effects.
The leptin gene is a gene in mammal involved in neuronal control to metabolic signals and thereby it is associated with weight.
In conclusion, weight is a quantitative trait and mice with a defective form of the leptin gene tend to have problems controlling weight because it is associated with this trait.
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Is it possible to distinguish between plants altered by classical genetics and those altered by modern techniques? if it is possible, how is it done?
Is it possible to distinguish between plants altered by classical genetics and those altered by modern techniques by looking under a microscope since DNA is microscopic.
Genetically modified organisms (GMOs):
A genetically modified organism (GMO) is an animal, plant, or microbe whose DNA has been altered using genetic engineering techniques.Using conventional breeding methods, people have been modifying the genomes of plants and animals for a long time.One of the most often used instances of genetically modified organisms is agricultural plants (GMOs). Increased crop yields, lower costs for food or drug production, less need for pesticides, improved nutrient composition and food quality, pest and disease resistance, greater food security, and medical benefits for the world's expanding population are a few advantages of genetic engineering in agriculture.More GMO research has the potential to assist numerous sectors. For instance, a number of microorganisms are being investigated as potential biodegraders and generators of clean fuel in the future.Learn more about the Genetically modified organisms (GMOs) with the help of the given link:
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A bacteriophage can be an important part of the genetic engineering process. Determine which of the following structures is not part of a bacteriophage.
A. Injection tube
B. Plasmid ring
C. Genetic material
D. Protein coat
A bacteriophage does not contain a plasmid ring.
What is a bacteriophage?A bacteriophage or phage is a virus which infects bacteria and replicates inside it.They destroy the host cell in which they infect.A bacteriophage consists of nucleic acid molecule (genetic material) surrounded by a protein coat or capsid.The genetic material in bacteriophage can be DNA or RNA which may be circular or linear, single or double stranded.Bacteriophage is formed of a head and a tail. Head consist of nucleic acid and protein coat.Tail consists of collar, base plate, sheath, tail fibers.The tail fibers attach to the host and inject tail tube to release genetic material into the host.A plasmid is an extrachromosomal genetic material of bacterial cell.Learn more about bacteriophage here:
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You are working with a research group and discover fossils of large animal. Upon close examination, it looks to be a mammal and an ancestor to the modern tiger, that you temporarily name 'Species X' until you learn more about it. Using your knowledge of the fossil record, you attempt to determine its relative age. You know that ______ evolved before species X, ______ had already evolved and gone extinct before species X evolved, and ______ did not evolve until after species X went extinct.
A. Winged insects, Dinosaurs, Humans
B. Humans, Dinosaurs, Flowering plants
C. Dinosaurs, Invertebrates, Land plants
D. Trilobites, Reptiles, Birds
When a portion of a chromosome breaks off and attaches to a different chromosome this is called a:_______
Answer:
Translocation
Explanation:
What is the major controlling factor for insulin levels?
a. availability of digestive enzymes
b. pancreatic health
c. diurnal patterns
d. blood glucose concentration
e. percentage of body fat
Blood glucose concentration is the major controlling factors for insulin levels. Glucose is the principal stimulus for insulin secretion, through other macro-nutrients, hormones, neural inputs may respond according to this insulin.
Tucked away behind the stomach is an organ called the pancreas, which produce insulin.Insulin production is regulated based on blood sugar levels and other hormones present in the human body.When food is digested, glucose is absorbed from human guts into the bloodstream,raising blood glucose levels.
In healthy human insulin production and release is fixed process, which allows human body to balance metabolic production and needs.It helps to glucose to comes out from bloodstream and into cells.
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The two waves are on two identical strings with the same tension. Identify which wave is high frequency and which wave is low frequency. What is the relationship of wavelength and frequency? Use the pictures to justify your answer.
(a) If the tension of the two waves is the same, the wave with higher frequency will be the wave with smaller mass per unit length.
(b) The frequency of a wave is inversely proportional to the wavelength of the wave.
Relationship between tension and frequencyThe frequency of a wave in string is given as;
f ∝√T/μ
where;
f is frequency of the waveT is tension in the stringμ is mass per unit length of the stringThus, if the tension of the two waves is the same, the wave with higher frequency will be the wave with smaller mass per unit length.
Relationship between wavelength and frequencyThe relationship of wavelength and frequency is given by the following formula;
f = v/λ
where;
f is frequency of sound wavev is speed of the sound waveλ is wavelength of the sound waveThus, the frequency of a wave is inversely proportional to the wavelength of the wave.
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Rachel carson’s warning in silent spring was focused on _______. a. overgrazing by livestock b. global warming c. the misuse of pesticides d. fish stock declines please select the best answer from the choices provided a b c d
Correct option is C. Rachel carson’s warning in silent spring was focused on the misuse of pesticides.
Rachel was concerned because pesticide misuse can cause significant and serious harm to humans, animals, and crops in general.
What can misuse of pesticide lead to?Pesticide poisoning can result from pesticide misuse, with symptoms ranging from mild skin irritation to seizures and death. Poisoning has a wide range of effects depending on the dosage and level of exposure. Secondary pest outbreaks occur when the use of a pesticide to reduce densities of an unwanted target pest species triggers subsequent outbreaks of other pest species, potentially fueling the dramatic increase in insecticide resistance.To learn more about misuse of chemicals from the given link
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Answer: Edge 2022, C. Global Warming.
Scalcet8 3. 8. 505. xp. a bacteria culture grows with a constant relative growth rate. after 2 hours there are 400 bacteria and after 8 hours the count is 50,000.
Find the initial population?
The initial population was 80
Solution ;The bacteria culture has a constant growth rate.
So, N(t) = No*(1 + r)^t
Solution :
400 = No*(1 + r)^2
50000 = No*(1 + r)^8
(1 + r)^6 = 125
=> 1 + r = 2.2360
No = 400÷(1 + r)^2 = 80
Hence, now we can conclude that the initial number of the bacterial culture was 80.
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Would hypothermia cause vasoconstriction or vasodilation of a vessel feeding a tissue?
Hypothermia would vasoconstriction of a vessel feeding a tissue.
What is hypothermia?In hypothermia the body temperature drops very low such that even necessary body functions cannot be maintained resulting in the vasoconstriction of blood vessels.Vasoconstriction (shrinking) of blood vessels helps by decreasing the exchange of heat of the organism’s body with the environment as the blood flow is decreased.Hypothermia is a medical emergency mainly caused due to exposure to cold for long time resulting is loss of heat faster than the body is able to generate it.It affects the brain resulting in confusion, memory loss, slurred speech.The initial symptom is uncontrolled shivering.Try to keep a hypothermic patient warm and provide medical care as soon as possible.Learn more about hypothermia here:
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The wings of a bat and an insect are __________ structures, meaning that they evolved from very different original structures-they are not descended from a common ancestor with wings.
The wings of bats and insects are analogous structures.
what is the analogous structure
analogous structure indicates structurally they are different but functionally they are the same.
In the case of bats and insects, the wing's structure originated from different structural origins, but they perform common functions like flying. means they are structurally different but functionally the same. that is called an analogous organ.
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Clinicians treating paraphilic disorders based on the biological perspective may:_____.
Clinicians treating paraphilic disorders based on the biological perspective may utilize psychotherapy drugs designed to change the person's neurotransmitter levels.
What is psychotherapy drugs?A psychoactive medicine used to alter the chemical composition of the brain and nervous system is known as a psychiatric or psychotropic drug. As a result, these drugs are employed to treat mental diseases.The term "psychosis" refers to a set of mental disorders, such as depression, schizophrenia, manic-depressive disorders, and so forth. Psychotherapeutic medicines are used to treat these disorders.They impact behavior and mood.The term "psychotropic medication" refers broadly to drugs that modify thought, behavior, and experience. Older persons are frequently given psychotropic drugs to treat their symptoms of anxiety, sadness, psychological distress, and/or insomnia.Psychotherapeutics is the area of psychiatry that focuses on psychological interventions. Physiotherapeutic employed in physical treatment or having some connection to it. Gasteropoda include relatives of snails and slugs. Psychoactive drugs that impact the mind, emotions, and other mental functions.
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The part of the eye that prevent light from reflecting internally and is heavily vascularized to deliver blood to the retina:_______
The part of the eye that prevent light from reflecting internally and is heavily vascularized to deliver blood to the retina: choroid.
What is choroid?The choroid is highly vascularized to provide blood to the retina and contains dark pigmentation to stop light from reflecting inside. Anteriorly, the choroid, ciliary body, and iris are all joined.. The ciliary body muscles regulate the lens's thickness. The iris acts as a diaphragm, changing the pupil's aperture at its center. This regulates how much light is allowed to enter the retina. In strong light, the iris' muscle fibers constrict the pupil to accommodate close vision; in low light, they enlarge it to accommodate far vision. Each individual's iris is a different color.
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The ability to work with the sick and the infirm depends on one's ability and willingness to show ________. select one: a. empathy b. integrity c. emotion d. discretion
The ability to work with the sick and the infirm depends on one's ability and willingness to show Empathy.
Option A is correct .
What is empathy ?
Empathy, the ability to understand and share the feelings of another, is an important asset to improve health outcomes for patients with LHL. Empathy is much more than just knowing a patient’s medical history, symptoms, or signs of disease and goes far beyond clinical diagnosis and treatment. It is the ability to truly understand the patients’ emotions, fears, pain and worry and the ability to respond to these.
The term “empathy” is used to describe a wide range of experiences. Emotion researchers generally define empathy as the ability to sense other people's emotions, coupled with the ability to imagine what someone else might be thinking or feeling.
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Ciliates, such as paramecium, are likely to be found in ____ or in the gut of mammalian grazers where they aid in the digestion of _____
Ciliates, such as paramecium, are likely to be found in freshwater and marine water or in the gut of mammals where they aid in the digestion of plant material.
Small, unicellular Paramecium organisms are common in freshwater ponds and marine habitats. It moves slowly while swimming, frequently shifting its course. It can multiply by dividing two or three times each day under the right circumstances, which can lead to huge populations. It is a member of the Protozoa class of organisms. Because the bacteria that paramecia consume are frequently found on decomposing plants, they play a part in the carbon cycle. In addition to eating the bacteria, Paramecium will also consume decaying plant debris, speeding up the process of decomposition.learn more about paramecium here: https://brainly.com/question/17546239
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What primarily differentiates the three types of cone photoreceptors in the retina?
The wavelength of light that the three types of cone photoreceptors in the retina are sensitive to primarily differentiates them.
The retina of vertebrate eyes, including the human eye, contains cone cells, or cones, which are photoreceptor cells.
They react differently to light of various wavelengths, and the interaction between these reactions is what gives people their ability to see color.
Contrary to rod cells, which perform better in low light, or the scotopic zone, cones work best in relatively high light, or the photopic region.
S-cones, M-cones, and L-cones are the three main varieties of cones, each with a unique pigment.
These cones are sensitive to the visible light spectrum, which includes short, medium, and long rays of light, respectively.
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When testing a four-wheel drive electronic component, the technician will use a scan tool to pull codes, and then a ________ to diagnose any codes found.
Answer: Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Explanation:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Explain the difference between weather and climate. Create a statement that describes weather and one that describes climate. Describe the weather factors that are important in determining where plant and animals can exist in an area. Describe at least three types of weather data that is collected, the instruments used to collect the data, and in what units they are measured. Differentiate between the three major climate zones.
Answer:
Weather refers to short term atmospheric conditions while climate is the weather of a specific region averaged over a long period of time. Climate change refers to long-term changes.
Explanation:
What is a difference between climate and weather?
Image result for explain the difference between weather and climate.
Weather can change from minute-to-minute, hour-to-hour, day-to-day, and season-to-season. Climate, is the average of weather over time and space. We hear about weather and climate all of the time. Most of us check the local weather forecast to plan our days.
What are the 3 differences between weather and climate in points?
Weather is the combination of temperature, humidity, precipitation, cloudiness, visibility, and wind. In popular usage, climate represents the synthesis of weather; more formally, it is the weather of a locality averaged over some period (usually 30 years), plus statistics of weather extremes
Explanation:
Weather is rain, snow, thunderstorms, hail, etc. Climate is a desert, island, rain forest, etc. Animals and plant's all need different weather and climate. For example a cactus's needs a hot climate and doesn't need a lot of wet weather (rain, snow, hail, thunderstorm, etc)