write a sba on human and social biology​

The following best describes how the use of hydrogen fuel negatively impacts the environment: The energy needed to produce the hydrogen fuel may come from fossil fuels, whose use contributes to ocean acidification and global climate change.

• The energy needed to produce the hydrogen fuel may come from fossil fuels, whose use contributes to ocean acidification and global climate change.

• The transport of hydrogen fuel requires pipelines that can negatively impact terrestrial habitats, especially when these pipelines leak.

• The harvesting of hydrogen fuel from ocean sediments can result in damage to marine ecosystems and fisheries.

• The combustion of hydrogen fuel releases carbon dioxide, which contributes to ocean acidification and global climate change.

Hydrogen fuel, like any other type of fuel, has its own set of benefits and drawbacks. While it is a clean fuel source, it has a few drawbacks that have negative environmental impacts. Therefore, the energy required to generate hydrogen fuel can come from fossil fuels, which, when used, release carbon dioxide into the atmosphere, contributing to global climate change and ocean acidification.

The transport of hydrogen fuel necessitates pipelines, which can be detrimental to terrestrial habitats, particularly when they leak. Hydrogen fuel can be derived from ocean sediments, but its harvesting can damage marine ecosystems and fisheries. Finally, when hydrogen fuel is burned, it releases carbon dioxide into the atmosphere, which contributes to ocean acidification and global climate change.

Learn more about Hydrogen fuel here: https://brainly.com/question/30589283

#SPJ11

Glycogen phosphorylase is regulated by phosphorylation and dephosphorylation, which are mediated by the action of protein kinase A (PKA) and protein phosphatase 1 (PP1), respectively. When the body requires glucose, glycogen is broken down by glycogen phosphorylase in the liver and muscle tissues.

Glycogen phosphorylase is a dimeric enzyme that is found in the liver and muscle tissues. In response to the breakdown of glycogen, it is activated by covalent modification.

The regulation of glycogen phosphorylase by covalent modification is as follows:

Glycogen phosphorylase is regulated by the hormones epinephrine and glucagon, which are secreted by the adrenal gland and pancreas, respectively. When the body is low on glucose, these hormones are released to stimulate glycogen breakdown in the liver and muscle tissues.

The phosphorylation of glycogen phosphorylase by protein kinase A (PKA) is triggered by cAMP, which is generated in response to hormone stimulation. The enzyme's activity is increased as a result of this post-translational modification.

The enzyme is also activated by dephosphorylation by protein phosphatase 1 (PP1).

The enzyme's activity is decreased as a result of this covalent modification. The dephosphorylation of glycogen phosphorylase is regulated by glycogen-associated regulatory subunits (R subunits) of PP1, which are activated by the binding of glycogen.

Learn more about glycogen phosphorylase at

https://brainly.com/question/28214761

#SPJ11

The food products to be avoided when the levels of alkaline phosphatase are high in the body are beef, poultry, seafood and oils like coconut or corn oil. These food are rich in zinc, phosphorus and vitamin B₁₂, and such foods need to be avoided.

Alkaline phosphatase is an enzyme which performs the role of dephosphorylating various compounds inside the body. These enzymes are generally located on the outer layer of cell membrane. The high levels of this enzyme can damage the liver or cause bone disorders.

Vitamin B₁₂ is also known as cobalamin. It is a waters-soluble vitamin which keeps the blood and nerve cells healthy. The enzyme is known to rise the activity of alkaline phosphatase and hence its intake should be avoided if the enzyme is in high concentrations.

To know more about Vitamin B₁₂, here

brainly.com/question/14596030

#SPJ4

Answer: Used the compound light microscope

Explanation:

All the scientists that contributed to the cell theory used the compound light microscope to make their discoveries.

These scientists include Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. Schleiden and Schwann formulated the first two tenets of the cell theory, stating that all living organisms are composed of one or more cells and that the cell is the basic unit of life.

Virchow later added the concept of cell division, proposing that all cells arise from preexisting cells. Although these scientists did not all know each other personally, they communicated and exchanged ideas through scientific publications and correspondence.

Their contributions laid the foundation for modern biology and our understanding of the fundamental properties of living organisms.

To know more about preexisting cells, visit:

https://brainly.com/question/24199709

#SPJ1

During a race such as a marathon, the skeletal muscle cells in your legs use a lot of energy to continually contract and power your muscles. The organelle that is most likely abundant in skeletal muscle cells is the mitochondria.

Mitochondria are organelles that are responsible for producing energy for the cell. These organelles are found in large quantities in cells that require a lot of energy to function, such as muscle cells. The energy that is produced by the mitochondria is in the form of adenosine triphosphate (ATP).

Skeletal muscles are the muscles that are attached to the bones of the body. These muscles are responsible for providing the body with movement and also for maintaining posture. They are also involved in other processes such as thermoregulation and protection of internal organs.

During a race such as a marathon, the skeletal muscle cells in your legs use a lot of energy to continually contract and power your muscles. This means that the mitochondria in these cells are working overtime to produce enough ATP to meet the demands of the muscles. This is why skeletal muscle cells have a high concentration of mitochondria in order to be able to keep up with the energy demands of the muscle.

Here you can learn more about skeletal muscle

https://brainly.com/question/31182318#

#SPJ11  

True. Duplications and deletions can be detected during meiosis by the presence of extrachromosomal loops that do not pair properly with their homolog.

Meiosis is a special type of cell division that reduces the chromosome number in half, producing haploid gametes (sperm and eggs) for sexual reproduction in animals, fungi, and some plants.

Duplications and deletions can be identified during meiosis, and the presence of extrachromosomal loops that do not pair correctly with their homolog is one way to do this. This is because homologous chromosomes, or pairs of chromosomes, must align during meiosis.

In prophase I of meiosis, homologous chromosomes, or pairs of chromosomes, come together to form a tetrad, which is a group of four chromatids. A crossover event may occur at this point, resulting in a recombination of genetic material between the two homologous chromosomes.

When a duplication or deletion occurs, it alters the genetic sequence of one of the homologous chromosomes, resulting in a failure to pair properly. This causes an extrachromosomal loop to appear, which can be seen as an abnormality during the process of meiosis.

Learn more about meiosis: https://brainly.com/question/25995456

#SPJ11

In a bacterial transcription unit, the role of the promoter is to form a recognition and binding site for the RNA polymerase. So the suitable term to fill in the blank is "promoter".

Transcription is the process of converting DNA into RNA. During transcription, the enzyme RNA polymerase reads the DNA sequence and transcribes it into a complementary RNA sequence. The transcription unit is the portion of DNA that is transcribed into RNA during transcription. It includes the promoter region, the RNA-coding region, and the terminator region. The promoter region is the site where RNA polymerase binds and initiates transcription, the RNA-coding region is the site where the RNA sequence is synthesized, and the terminator region is the site where transcription terminates.

Learn more about transcription: https://brainly.com/question/1048150

#SPJ11

When the curve is increasing between 0-2. As voltage-gated sodium channels open, positively charged sodium ions flood into a neuron, causing depolarization.

Na+ sodium channels activate during the start of the action potential, increasing Na+ conductance by up to 5000-fold. The Na+ channels are then shut off by the inactivation mechanism. The K+ channels are voltage gated at the beginning of the action potential, which causes them to open at the same time that the Na+ channels close.

Each voltage-gated sodium channel's inactivation gate closes at the maximum between the depolarization and repolarization phases, blocking additional sodium ion inputs.

Target cells depolarize in the direction of the threshold potential in response to stimulation from sensory or other neurons. The membrane depolarizes and all Na+ channels open when the excitation threshold is met. K+ channels open and K+ starts to leave the cell at the height of the action potential.

To know more about the activation gate visit:

https://brainly.com/question/28025514

#SPJ1

Viruses are thought to live somewhere in the middle since they cannot evolve or proliferate on their own. The effect is that they vanish.

Most biologists reply "no." Viruses cannot maintain a constant condition, evolve, or produce their own energy since they are not made of cells. Viruses do reproduce and adapt to their environment, but they are more like robots than true living organisms.

Originally believed regarded as biological substances, viruses were then viewed as life forms, life-forms, and finally as poisons. Today, they are viewed as being in a transitional state between life and non-life.

To know more about reproduce visit:-

https://brainly.com/question/30408307

#SPJ1

The given statement "Predator/prey relationships are always linear, with one species affecting only one other in the community" is false because Predator/prey relationships are not always linear and can be more complex. For example, a predator may feed on multiple prey species, and a prey species may have multiple predators.

Predator/prey relationships are not always linear and can be more complex. For example, a predator may feed on multiple prey species, and a prey species may have multiple predators. Additionally, there may be indirect effects in which the presence or absence of one species can affect the interactions between other species in the community.

Overall, the relationships between species in a community are often interconnected and can be represented by a food web rather than a simple linear chain.

To learn more about Predator/prey relationships

https://brainly.com/question/1778577

#SPJ4

The structure in which fetal development usually occurs is uterus, however fertilization usually takes place in a fallopian tube that links an ovary to the uterus.

The blastocyst grows into an embryo linked to a placenta and surrounded by fluid-filled membranes inside the uterus, where it implants in the uterine wall.

Usually, the fallopian tube that connects an ovary to the uterus is where fertilization occurs. An embryo begins to develop if the fertilized egg successfully passes through the fallopian tube and implants in the uterus.

Learn more about uterus at:

https://brainly.com/question/1228092

#SPJ1

The main function of the hypothalamus is to direct the activity of the Pituitary gland.

The pituitary gland is a small, pea-sized gland located at the base of the brain, in the center of the head. It is often referred to as the "master gland" of the body because it secretes hormones that control various functions of other endocrine glands in the body. Overall, the pituitary gland plays a crucial role in maintaining the proper functioning of the body by regulating the production and release of hormones that control various physiological processes.

The pituitary gland is divided into two parts, the anterior pituitary and the posterior pituitary. The anterior pituitary gland secretes several hormones including growth hormone, thyroid-stimulating hormone, adrenocorticotropic hormone, follicle-stimulating hormone, luteinizing hormone, and prolactin. These hormones regulate growth, metabolism, stress response, reproductive function, and milk production in mammals.

To learn more about Pituitary gland visit here:

brainly.com/question/30289440

#SPJ4

However, depending on the sort of data being analysed and the research topic being addressed, there are numerous approaches to graph protein expression levels in general.

G1-phase cyclins, G1/S-phase cyclins, S-phase cyclins, and M-phase cyclins are examples of common cyclin classes. M-phase cyclins assemble into M-CDK complexes, which initiate mitosis in the cell.

Cyclins collaborate with an enzyme family known as the cyclin-dependent kinases to control the cell cycle's activities (Cdks). A Cdk that is not bound to a cyclin is inactive, but when it is, it becomes a functioning enzyme that can alter target proteins.

To know more about protein visit:-

https://brainly.com/question/30728989

#SPJ1

Corn and legumes are two frequently changed foods. GMOs can be processed into cornstarch, maize syrup, soybean oil, canola oil, corn oil, and powdered sugar. Cotton that has been genetically changed can be used in textiles, and scientists can alter organisms to be used in medicines such as human insulin.

Some argue that consumers should have the right to know everything about what's in their food in the continuing argument over whether or not genetically modified foods should be labeled. Others argue that there is no proof that such goods are harmful to health and that labeling is unnecessary.Scientists have long been modifying the genes of food crops in order to increase agricultural yield and make cereals more pest-, drought-, and cold-resistant. GMO advocates claim that producers who cultivate these crops can use fewer ecologically harmful pesticides.

GMOs can be processed into cornstarch, maize syrup, soybean oil, canola oil, corn oil, and powdered sugar. Cotton that has been genetically changed can be used in textiles, and scientists can alter organisms to be used in medicines such as human insulin. Genetically modified (GM) meals are also known as bioengineered (BE) commodities.

Some argue that consumers should have the right to know everything about what's in their food in the continuing argument over whether or not genetically modified foods should be labeled. Others argue that there is no proof that such goods are harmful to health and that labeling is unnecessary.

GMOs, or genetically modified organisms (GMOs), are a source of contention.—crops engineered with spliced genes to make them more resilient or larger—was addressed in a five-part WGBH radio series called "Food Fights," which aired the week of October 5, 2016, and featured Harvard T.H. Chan School of Public Health's Walter Willett, Fredrick John Stare Professor of Epidemiology and Nutrition and chair of the Department of Nutrition. Willett told WGBH that there is no conclusive proof that GMOs harm human health. "I believe we'll almost never be able to make a broad statement about whether GMOs are good or bad for us," he said. "This is a technology, and like most technologies, it can be used for good or for evil."

Federal money for projects that will bring down the price of solar technology has poured into the solar sector in significant amounts. By 2030, solar energy costs should be decreased in half if the funding has the desired impact.

Photovoltaic (PV) panels or solar radiation-concentrating mirrors are two ways that solar technologies turn sunlight into electrical energy. Electricity can be produced from this energy, which can also be used to store energy thermally or in batteries.

Sunlight energy that has been transformed into either electrical or thermal energy is known as solar power. The U.S. boasts some of the wealthiest solar resource bases in the world. Solar power is the least polluting and most plentiful renewable energy source currently available.

To know more about Solar visit:

https://brainly.com/question/28510762

#SPJ1

In some trees and shrubs, competition among seedlings causes individuals to be spaced relatively evenly throughout the habitat. These plants exhibit a uniform type of dispersion pattern.

Uniform dispersion is a distribution of a population of organisms in which the distance between individuals is roughly the same. Uniform dispersion is frequently observed in populations of plants and animals, and it is commonly caused by competition for limited resources in the habitat. Plant roots, for example, may actively produce exudates that inhibit other plants' growth or development, reducing the overall population density of the plant in question.

Learn morea about Uniform dispersion: https://brainly.com/question/19595569

#SPJ11

In positive selection of T-lymphocytes, those cells that can bind MHC survive

T-lymphocytes are a subset of white blood cells that are involved in the immune response. They are responsible for attacking foreign pathogens and infected cells in the body. There are several different types of T-lymphocytes, each with its own specific function.Positive selection of T-lymphocytes refers to a process in which only those cells that can recognize and bind to the major histocompatibility complex (MHC) are allowed to survive. MHC molecules are proteins found on the surface of cells that present antigenic peptides to T-lymphocytes.

In the thymus, developing T-lymphocytes are tested to see if they can recognize self-antigens presented by MHC molecules. This is important because it helps prevent autoimmunity, or the attack of healthy cells by the immune system. Only T-lymphocytes that are capable of recognizing self-antigens presented by MHC molecules are allowed to survive and mature. The others are eliminated by apoptosis. So, in positive selection of T-lymphocytes, those cells that can bind MHC survive.

Learn more about MHC at:

https://brainly.com/question/30640144

#SPJ11

Natural selection is a process by which organisms with greater environmental adaptations have a higher chance of surviving and procreating.

Natural selection is what we call this. It causes some features to dominate in a population while suppressing others. in synthetic selection. This can eventually result in modifications to the frequency of particular features within a population.

Advantageous characteristics help certain people survive and reproduce in successive generations. And a growing number of offspring exhibit these traits. Depending on the situation, it could take just a few generations or thousands.

To know more about Natural selection visit:-

https://brainly.com/question/9830102

#SPJ1

The bacteria that does not belong to the group of the other bacteria in the following list is escherichia.

A bacterium, commonly known as bacteria, is a microscopic, single-celled organism that lacks a nucleus and other membrane-bound organelles. They are classified into the Monera kingdom's prokaryotes. The bacterial genome is housed in the nucleoid (a central location containing the chromosome), and they have a well-organized cell structure with a cell wall, ribosomes, and other cellular machinery.

Bacteria are an essential component of life on earth. They are involved in a variety of processes, including the decomposition of organic matter, nitrogen fixation, and the production of antibiotics and other bioactive compounds, among others. Certain bacteria can cause disease, while others are beneficial, making them an important part of human health and medicine.

There are several species of bacteria, such as streptococcus, staphylococcus, lactobacillus, bacillus, and escherichia coli. Of the five species listed, only escherichia does not belong because it is a genus of bacteria, whereas the others are individual species. Streptococcus, Staphylococcus, Lactobacillus, and Bacillus are all separate species. As a result, the correct response is escherichia.

Learn more about bacteria here: https://brainly.com/question/16479483

#SPJ11

Answer: Your will be An invasive species is any species that has a negative impact on community diversity.

The three situations where very small DNA samples may be available for sampling and PCR could be used : Forensic investigations, Prenatal testing and Archaeological research

PCR (Polymerase Chain Reaction) is a technique that can amplify small amount of DNA into large amount, making it a powerful tool in many situations where only small DNA samples are available. Three situations where only very small DNA samples may be available for sampling and PCR could be used are as follows:

Forensic investigations: In forensic investigations, DNA evidence is often collected from crime scenes or other sources where only small amount of DNA is present, such as from skin cells, bloodstains or hair follicles. PCR can be used to amplify small amount of DNA obtained from these sources, enabling further analysis and identification of suspects.

Prenatal testing: During prenatal testing, samples of amniotic fluid or chorionic villus tissue are collected from developing fetus. These samples contain small amount of fetal DNA mixed with maternal DNA. PCR can be used to amplify small amount of fetal DNA in these samples, allowing for genetic testing to identify genetic disorders or other abnormalities.

Archaeological research: In archaeological research, DNA may be extracted from ancient bones or other remains. These samples often contain only small amount of DNA, which may be degraded or contaminated. PCR can be used to amplify small amount of DNA in these samples, allowing for further analysis of ancient DNA.

To know more about DNA, refer

https://brainly.com/question/16099437

#SPJ1

Enzyme activity can be altered by a variety of factors, including changes in temperature, pH, and substrate concentration. Here are three specific conditions that could alter enzyme activity:

Temperature: There is a certain temperature where enzymes work at their best. Changes in temperature can alter enzyme activity by denaturing the protein structure of the enzyme or changing the rate of the chemical reaction. For example, at high temperatures, the increased kinetic energy can cause the enzyme to denature, which reduces its activity. Conversely, at low temperatures, the chemical reactions may proceed too slowly, also reducing enzyme activity.

pH: Enzymes have an optimal pH range at which they function most efficiently. Changes in pH can alter enzyme activity by altering the charge of the enzyme or its substrate. For example, an enzyme that functions in acidic conditions may lose activity in basic conditions. This can occur because the change in pH alters the ionization of amino acid residues on the enzyme's active site, reducing its ability to interact with the substrate.

Substrate concentration: Enzyme activity can also be affected by the concentration of substrate molecules available. At low substrate concentrations, the enzyme may not be fully saturated with substrate, which can limit the rate of the chemical reaction. However, at high substrate concentrations, the enzyme may become saturated, and the rate of the reaction may reach a plateau, as the enzyme becomes unable to bind additional substrate molecules. This is known as substrate inhibition, and can occur due to the presence of a regulatory molecule or due to changes in the enzyme's conformation that occur as it binds substrate.

To know more about Enzyme click here:

brainly.com/question/14953274

#SPJ4

The evidence that the first forms of life were prokaryotes.

Several scientific fields have provided evidence that the initial living forms were prokaryotes, which are single-celled organisms without nuclei and other membrane-bound organelles.

Several lines of evidence, when considered collectively, provide significant support for the idea that prokaryotes were the first life forms, and that they eventually gave rise to the wide variety of living things found on Earth today.

To know more about bacteria,

https://brainly.com/question/15490180

#SPJ4

The diploid zygote forms at fertilization (d) in seed plant reproduction.

The megagametophyte, which creates the egg cell, is a component of the female reproductive structure known as the ovule in seed plant reproduction. The male gametophyte, which generates the sperm cell, is found in the pollen grain, which is the male reproductive structure. When a pollen grain touches the stigma of a female reproductive structure, it starts to build a pollen tube down the style, enabling the sperm cell to contact the egg cell inside the ovule. This process is known as pollination.

A diploid zygote is created during fertilisation as a result of the union of the sperm and egg cells. This zygote then proceeds through mitotic division to create an embryo, which later matures into a seed.

TO know more about fertilisation click here

brainly.com/question/1294562

#SPJ4

Phage typing is based on the fact that bacterial viruses attack only members of a specific species, Bacteria, and phages are related.

Phage typing is a method for determining the type of bacterial infection a person has. Phages are viruses that are bacterial-specific. They infect and kill specific bacteria species only. This is the main idea behind the Phage Typing method.

It is dependent on the characteristic of bacteriophages to specifically kill or infect bacteria. A bacteriophage is a type of virus that can only infect and kill specific types of bacteria.

As a result, each phage is only effective against a certain species of bacteria. In this way, Phage typing is based on the fact that bacterial viruses attack only members of a specific species. Therefore, option (a) is the correct answer.

Learn more about bacteriophages here:

https://brainly.com/question/29308011

#SPJ11

The two monosyllables describing the heart sounds are lub and dub. The first heart sound is a result of closure of the mitral and tricuspid valves, whereas the second is a result of closure of the pulmonary and aortic valves. The heart chambers that have just been filled when you hear the first heart sound are the left atrium and right ventricle, and the chambers that have just emptied are the left ventricle and right atrium. Immediately after the second heart sound, both the left atrium and right atrium are filling with blood.

Heart sounds are noises that arise when the heart beats. The two primary sounds produced by the heart's two primary valves are commonly called "lub" and "dub." When blood is pumped into the lungs, the first heart sound (lub) is generated. The second heart sound (dub) happens when blood is pumped out of the heart and into the body via the aorta.

Heart sounds originate from the closing of the heart's valves. When the heart's four valves shut, they generate vibrations that can be heard using a stethoscope or other listening device. These sounds, called S1 and S2, correspond to the opening and closing of the heart's atrioventricular and semilunar valves, respectively.

Learn more about Heart sounds here: https://brainly.com/question/2515627

#SPJ11

Hurricane is a natural disaster that affects the population and their carrying capacity. Natural disaster decreases the carrying capacity of the insects as they were dependent on the sawgrass.

What is carrying capacity?

Carrying capacity has been defined as the quantity or the number of the biotic factor or the living being that is supported by the ecosystem without any negative repercussions. It can be said to be the maximum population that a habitat or ecosystem can hold.

The size of the population is maximum only if resources like food, shelter, habitat, reproduction, etc., are available to the organism so that there is no hindrance to their growth and development.

Hurricanes and other natural disasters have been affecting the carrying capacity negatively and have been known to have a detrimental effect on the environment. The destruction in the bayou wipes the sawgrass that was food for the insects. This decreases the population of the insects that were dependent on the sawgrass.

Therefore, a hurricane negatively affects the carrying capacity.

Learn more about carrying capacity, here:

brainly.com/question/14194197

#SPJ2

Bacterial adherence uses microbial adhesins to bind to host cell surface glycoproteins, glycosphingolipids, or glycosaminoglycans to establish a unique niche within the host.

Microbial adhesions, also known as bacterial adhesins or bacterial ligands, are proteins or glycoproteins found on the surface of bacteria that are responsible for attachment to host cells.

These adhesins recognize specific receptors on the surface of the host cell, including glycoproteins, glycosphingolipids, or glycosaminoglycans, which are essential for establishing a unique niche within the host.

By binding to these receptors, bacteria can adhere to the host cell surface and avoid being cleared by the immune system, ultimately leading to colonization and infection.

For more such questions on glycoproteins, click on:

https://brainly.com/question/29524967

#SPJ11

The light-producing genes are under transcriptional control hence the correct choice is A.

This is because the regulator, which controls the production of mRNA that the light-producing genes need, is an essential part of the transcriptional control.

In genetics, transcriptional regulation refers to the process by which a gene is regulated by the control of the initiation or inhibition of gene transcription. The regulator, which is usually a DNA-binding protein, performs this function.In response to signals from the environment or to physiological changes, the regulator binds to DNA and assists RNA polymerase in recognizing the gene's start site, allowing mRNA to be made.

As a result, the light-producing genes are under transcriptional control, which means that the regulator controls the production of the genes' mRNA. This helps to clarify why transcriptional regulation is so critical to genetic regulation. It is the method of regulating gene expression, which includes the control of mRNA synthesis.Therefore, the correct answer is a. transcriptional control.

More on genetics: https://brainly.com/question/14227926

#SPJ11

Mammals and birds get the energy for their own heat from the food they consume. The heat produced by mammals and birds as a result of their own energy production is known as endothermy.

Here, correct option is B. From food the animals eat

When there is insufficient environmental heat, mammals and birds regulate their internal temperature via metabolic rate, which is known as endothermy. Endothermy is a metabolic activity in which heat is produced internally. It is found in a variety of mammalian and avian species.

Endothermic animals have the ability to sustain a constant internal body temperature, which aids in the maintenance of their metabolism at all times. Mammals and birds are known for their endothermic abilities. A snake, on the other hand, is an example of a cold-blooded animal. This is also known as an ectothermic animal. Ectothermic animals rely on external heat sources to regulate their body temperature.

They do not possess the ability to regulate their body temperature internally. They don't have the capability to create their own heat. Therefore, correct option is B. From food the animals eat.

know more about Mammals here

https://brainly.com/question/15326492#

#SPJ11