a biology student is reading research articles about the effects of various feedback mechanisms on the human body. based on commonly accepted scientific theories and models, which of the following is an example of a correct prediction of a positive regulatory feedback mechanism? (1 point)

Altering all primary, secondary, tertiary and quaternary levels of structural organization could change the function of an enzymatic protein

What are enzymatic proteins?

Enzymes are proteins that interact with substrate molecules to reduce the activation energy required for a chemical reaction to occur by stabilizing the transition state. This stabilization accelerates response rates and allows them to occur at physiologically meaningful rates.

Different levels of enzymatic proteins:

Hence alteration of all levels can change the function.

To learn more on proteins click,

https://brainly.com/question/884935

#SPJ4

The answer is option d. the web domain is a .com .

What is an evaluation of a source of information?

Evaluating sources means recognizing whether the information you read and incorporate into your research is reliable. There is a vast amount of information available both in print and online, but not all of it is valid, useful or accurate. Evaluating the sources of information to include in your text is an important step in the research process.

Here, in option d. the web domain is a .com, Domain names provide information about the types of websites you are visiting and help determine if the information you are viewing is legitimate.

This is used to create the website but is it not an informative website.

Hence, except option d. the web domain is a .com all the options are correct.

To learn more about evaluation of a source of information, click on the given link: https://brainly.com/question/27131572

#SPJ4

Ketone bodies is the potential major source of energy for the brain during prolonged starvation.

The ketone groups created by the liver from fatty acids are contained in ketone bodies, which are water-soluble molecules (ketogenesis). The conversion of ketone bodies into acetyl-CoA (acetyl-Coenzyme A), which enters the citric acid cycle (Krebs cycle) and is eventually oxidized for energy, occurs in organs beyond the liver. Acetoacetic acid (acetoacetate), beta-hydroxybutyrate, and acetone, an acetoacetate spontaneous breakdown product, are among the ketone groups generated from the liver. The liver produces ketone bodies in a variety of caloric-restrictive conditions, including starvation, carbohydrate-restrictive diets, extended strenuous exercise,alcoholism, and type 1 diabetic mellitus that is untreated (or poorly managed). By breaking down fatty acids, liver cells make ketone bodies.

learn more about ketone bodies Refer:brainly.com/question/16169202

#SPJ4

Disseminated intravascular coagulation (DIC) is a serious medical condition characterized by abnormal clotting and bleeding. It is a complex disorder that can affect different body systems and organs.

DIC is often a complication of other underlying conditions such as cancer, sepsis, and pregnancy complications. One of the hallmarks of DIC is the simultaneous presence of clotting and bleeding. The formation of clots in small blood vessels leads to organ damage and tissue death, while bleeding can occur due to the consumption of clotting factors.The test results that would be inconsistent with DIC would be a low level of clotting factors such as fibrinogen and platelets, and a high level of fibrinolytic activity which is the activity of enzymes that break down clots. This would indicate that the person's blood is not clotting properly, and would not be consistent with the simultaneous presence of clotting and bleeding seen in DIC.So, a test result showing a high level of fibrinogen and platelets, and a low level of fibrinolytic activity would be consistent with disseminated intravascular coagulation (DIC) and the other results would be inconsistent with DIC.

To learn more about Disseminated intravascular coagulation (DIC) here:

https://brainly.com/question/13086489

#SPJ4

The Slash and burn clearing method of harvesting trees will lead to a fragmented landscape with serious impacts on biodiversity. The correct option is D ;

Tree harvesting is the process whereby trees in a forest are cut down for various uses such as building construction and for use as fuel. The methods employed for harvesting trees will affect the environment either negatively or positively. The best harvesting methods include: Selective cutting gleaning

However, other methods such as Slash and burn clearing will lead to a fragmented landscape with serious impacts on biodiversity.

Learn more about harvesting trees at:

brainly.com/question/3988204

#SPJ4

If bears find insects after they move decaying logs, they more frequently move decaying logs. This most clearly indicates that finding insects is a: Reinforcement.

Natural selection may improve the reproductive isolation (also known as pre-zygotic isolation and post-zygotic isolation) between two populations of a species through the process of reinforcement. This happens as a result of selection working to prevent the development of hybrid people who aren't very fit. It is frequently referred to as the Wallace effect and was first proposed by Alfred Russel Wallace. Theodosius Dobzhansky is responsible for developing the contemporary notion of reinforcement. He imagined a species that is allopatrically isolated, in which the two groups mate during secondary contact and give rise to hybrids that are less fit. Due to the hybrid's incapacity to give birth to live offspring, natural selection favors individuals of one species over those of the other in terms of reproductive success.

learn more about reinforcement Refer:brainly.com/question/5162646

#SPJ4

Whether an organism survives and reproduces is almost entirely a matter of random chance.

Darwinism or other academics of his time argued that nature operated naturally, with no help from humans, through a process resembling artificial selection.He made the case that the evolution of numerous different living forms through time from a common ancestor could be explained by natural selection.

Evolution is governed by four principles: variation, inheritance, selection, and time.These are regarded as the elements of natural selection's evolutionary mechanism.

To know more about organism survives visit:

https://brainly.com/question/9161886

#SPJ4

Option B, Recombinant DNA plasmids have an advantage over PCR because they are able to create large amounts of copies more quickly than PCR.

PCR, or Polymerase Chain Reaction, is a technique that allows for the amplification of specific DNA sequences, but it requires multiple cycles of heating and cooling to copy the DNA, which can take a relatively long time. PCR the other hand, recombinant DNA plasmids can be used to create many copies of a specific DNA sequence in a single step, using bacteria as a host. The bacteria will naturally replicate the plasmid along with its own DNA, thus producing many copies of PCR the plasmid containing the desired DNA sequence. This is a faster and more efficient method for creating multiple copies of a specific DNA sequence.

Learn more about PCR here:

https://brainly.com/question/7177771

#SPJ4

The correct option is B ; demyelinating disease is any ailment that damages the protective covering (myelin sheath) that protects nerve fibers in your brain, optic nerves, and spinal cord.

Nerve impulses slow or even cease when the myelin sheath is destroyed, producing neurological disorders.

The transmission of nerve impulses is hampered when the sheath is damaged. Messages are not transmitted swiftly and clearly from the brain to the appropriate bodily area.

If a person's nervous system's myelin was damaged, they would most likely work more slowly since myelin helps to speed up the rate at which impulses are transferred through the nervous system.

Learn more about to myelin

https://brainly.com/question/28044185

#SPJ4

Full Question ;

the myelin sheath plays an important role in neuron structure and function. however, when the myelin sheath is missing or not fully intact, there are consequences. there are many conditions that cause demyelination of neurons, some are autoimmune disorders, such as multiple schlerosis, and others are hereditary. the symptoms of these conditions vary, but often include speech impairment and difficulty coordinating movement. which of the following correctly connects the symptoms of demyelination with the process of nerve impulse transmission?

Relapsing-remitting MS

Demyelinating Diseases

Clinical Assessment

Cell Bodies

D) the complete set of an organism's genes and other DNA sequences.

Pay attention to how it sounds.(jeh-NOH-mix)the study of a person's or another organism's entire DNA (containing all of its genes).A person's genome is present in almost each cell in their body.

The totality of an organism's genetic data is included in its genome.It offers all the data needed for the organism to function.The genome is kept in living creatures in the form of chromosomes, which are large DNA molecules.

To know more about DNA sequences visit:

https://brainly.com/question/29925842

#SPJ4

Each parent's meiosis produces haploid gametes, which have only one set of chromosomes.

Many gametes with unique allele combinations are produced during this process as a result of chromosome crossing over and independent chromosome distribution. During fertilisation, any pair of gametes (such as an egg and sperm) that each contain chromosomes from one parent can combine to form a diploid cell. The variety of various features that can be combined increases as a result of this random fertilisation. The offspring displays features in novel combinations after inheriting genes from both parents. Crossing over results in recombination, which combines maternal and paternal traits in the child.

Learn more about Chromosome here:

https://brainly.com/question/1596925

# SPJ4

Spatial Summation occurs when postsynaptic neuron receives signals from different synapses at the same time.

Postsynaptic potentials are summed when a presynaptic neuron fires rapidly and repeatedly ("temporal summation"), when numerous presynaptic terminals fire simultaneously ("spatial summation"), or when both types of summing occur simultaneously. At the hillock, an action potential happens when the voltage-gated sodium channel activation threshold is met. Like flushing a toilet, this operation is all-or-nothing: it either happens or it doesn't. Finally, we contrast a neuron with a nervous system circuit. The axon is the efferent limb in this analogy, whereas the dendrites and soma are the afferent limbs.

To know more about postsynaptic neuron, visit: https://brainly.com/question/29993548

#SPJ4

When recording the present history of a patient, 'timing' can refer to whether a symptom has been consistent or sporadic is True.

Instead of an obvious epidemic or endemic pattern, the term "sporadic" in epidemiology refers to a disease that only rarely, randomly, irregularly, or sometimes from time to time in a few isolated regions. a distinct disease process with a recognizable set of symptoms. The genesis, pathophysiology, and prognosis of this condition might be known or unknowable, and it can affect the entire body or any one of its sections. See the exact term, such as addison's disease, for information on specific disorders. See also syndrome, mal, disease, and ailment.a condition that only occasionally affects one person at a time.

learn more about sporadic Refer:brainly.com/question/9240558

#SPJ4

The four potential nitrogenous bases found in DNA are adenine (A), guanine (G), nucleotides (C), and thymine (T). The purines guanine and adenine are

Mitochondrial dna (DNA) and ribosomal rna (RNA), two types of nucleic acids that carry genetic information and are read by cells to create the RNA and proteins that allow living organisms to function. This knowledge may be replicated and passed onto the next generation thanks to the DNA double helix's well-known structure.

the picture

A polynucleotide is the fundamental component of nucleotides (RNA and DNA). A nucleotide is made up of an attached sugar molecule, either ribose in Mrna or deoxyribose in DNA.

to know more about organisms visite:

https://brainly.in/question/31910079

#SPJ4

The four potential nitrogenous bases found in DNA are adenine (A), guanine (G), nucleotides (C), and thymine (T). The purines guanine and adenine are

Mitochondrial dna (DNA) and ribosomal rna (RNA), two types of nucleic acids that carry genetic information and are read by cells to create the RNA and proteins that allow living organisms to function. This knowledge may be replicated and passed onto the next generation thanks to the DNA double helix's well-known structure.

A polynucleotide is the fundamental component of nucleotides (RNA and DNA). A nucleotide is made up of an attached sugar molecule, either ribose in Mrna or deoxyribose in DNA.

To know more about organisms visit:

https://brainly.com/question/24376211

#SPJ1

The increase in concentration of CO₂ will leads to form low pH of water because CO₂ is a acidic oxide.

Any material with a pH value between 0 and 7 is known to be acidic while a pH value between 7 and 14 is a base. whereas, bases are ionic compounds that produce hydroxide ions when dissolved in water.

 Normally, the pH value of rice is within the range of 6 to 7 pH, though it can vary with different types. For instance, white rice has a pH of 6 to 6.7, brown rice has a pH of 6.2 to 6.7 and wild rice has a pH of 6 to 6.4.

To know more about acidic visit

https://brainly.com/question/11543614

#SPJ4

Answer: AIDS

Explanation: AIDS can be passed from generations to generations. She can pass it to her children.

The diffusion rate increases as a substance gets smaller, when equal-size samples of two colored substances were placed on an agar plate and allowed to diffuse for an hour. You may understand why larger cells would require extra assistance to transfer materials by studying cubes of various sizes.

Materials must be transported into and out of all biological cells across the plasma membrane. You may simulate how diffusion works in cells by soaking treated agar cubes in vinegar after infusing them with a pH indicator. When molecules travel from a region of higher concentration to a region of lower concentration, this process is known as diffusion. You can see how far the hydrogen ions have diffused by observing how the color of the agar cube changes as the hydrogen ions from the vinegar move into the cube. Although random molecular motion will continue to cause specific molecules and ions to alternately move between the agar cube and the vinegar solution, the overall concentrations will stay in equilibrium, with equal concentrations both within and outside the agar cube.

To learn more about diffusion from the link: https://brainly.com/question/20843145

#SPJ4

Incomplete question given. The complete question is:

Equal-size samples of two colored substances where placed on an agar plate and allowed to diffuse for an hour. After studying the picture above, what conclusion can you draw regarding the effect of size (molecular weight) on the rate of
i)  Molecular size does not affect the rate of diffusion.

 ii) The larger the substance, the faster the diffusion rate.

 iii) The smaller the substance, the faster the diffusion rate.

iv) Actually, conclusions cannot be drawn because no diffusion was observed.

Based on the picture it can be concluded that:

i) A small cell is better able to maintain homeostasis because it has a larger volume to surface area and, therefore, can have a more efficient exchange rate at its surface and less volume for diffusion to occur.

 ii) A large cell is better able to maintain homeostasis because it has a smaller surface area to volume rate and, therefore, can have a more efficient exchange rate at its surface and less volume for diffusion to occur.

 iii) A small cell is better able to maintain homeostasis because it has a larger surface area to volume ratio and, therefore, can have a more efficient exchange rate at its surface and less volume for diffusion to occur.

iv) A large cell is better able to maintain homeostasis because it has a larger volume to surface area and, therefore, can have a more efficient exchange rate at its surface and less volume for diffusion to occur.

The beaker to the right shows the bag after one hour immersed in NaOH. Noticing the change in color, what can you conclude?

i) Phenolphthalein diffused out of the bag, and that made the solution inside the bag turn pink.

ii) Both NaOH and phenolphthalein diffused across the membrane. The membrane pores are large enough for both substances to move across

iii) Water reacted with the phenolphthalein and changed its color to dark pink.

iv) NaOH diffused into the bag, raising the pH inside the bag and changing the color of the phenolphthalein. The pores on the membrane are not large enough for phenolphtalein to exit

In which test tube did the cells become crenate?

i) In the test tube containing water.

ii) In the test tube containing 1.8% NaCl.

iii) In none of them.

iv) In the test tube containing 0.9% NaCl.

The beaker to the right shows the bag after one hour immersed in the iodine solution. Noticing the change in colour, what can you conclude?

i) iodine diffused into the bag, changing the colour of the solution to blue-black. The pores on the membrane are not large enough for starch to exit.

ii) Both iodine and starch diffused across the membrane. The membrane pores are large enough for both substances to move across.

iii)  Starch diffused out of the bag, and that made the solution outside change in colour.

iv)  Water reacted with the iodine and changed its colour to dark blue.

The steps of the scientific method in order:

1)observe and ask questions about something in the natural world

2)create a hypothesis to explain your observations and make predictions

3)carry out the experiment(s) to test the hypothesis and collect data

4)analyze your data and draw conclusions

No, in some areas of science it can have more easily experimented than others. For instance, scientists who study how stars change as they age cannot fast-forward a star's life by a million years to test their hypotheses. When direct experimentation is not possible to do, scientists alter the scientific method.

The final step of the scientific method is to display the results. After you collected and examined your data, you draw a final conclusion about your hypothesis. A conclusion is a summary of what you have understood from an experiment.

To know more about data, visit here:

https://brainly.com/question/10980404

#SPJ4

(c)Abu Hureyra.

It is important because it demonstrates the transition from foraging to farming in one of the world's prior centres of agricultural expansion.

Evidence found at Abu Hureyra signifies that rye was the first cereal crop to be cultivated in a systematic way. In contrast of this, it is now acknowledged that the systematic cultivation of cereal crops was around first time about 13,000 years ago.

Lentils have helped to shape the path of human history for over 13000 years. Today, we add lentils to tasty dishes, soups and salads. In ancient times, however, lentils were an essential part of setting modern societies.

To know more about cultivation, visit here:

https://brainly.com/question/17158503

#SPJ4

High Volume Sampler method can be used for sampling of particulate matter.

A realistic alternate sampling method to collect particulate matter from vehicles would be using a high-volume sampler. A high-volume sampler is a device that uses a pump to draw in a large volume of air and filter it through a pre-weighed filter. To ensure that the results are reliable, the student could modify the experimental design by use multiple passive samplers, the student can increase the sample size and reduce the impact of any individual outliers. Use a control group: By using a control group of vehicles that are known to have low emissions .Use an independent laboratory for analysis, the student can ensure that the results are not biased and increase the reliability of the data. Use proper data analysis and statistical methods: the student can ensure that the results are statistically significant and increase the reliability of the data. Use a Blinded study:  the student can ensure that the results are not biased by the experimenter's expectations and increase the reliability of the data.

Learn more about data analysis here:

https://brainly.com/question/13103333

#SPJ4

There in fat cells of seventeen patients with adult-onset diabetes, enzyme activities involved in glucose breakdown and the creatine cleavage pathway were examined.

Hexokinase, aldose reductase, and glucose dehydrogenase activities were assessed in extracts of cow, calf, rabbit, rat, and guinea pig eye lenses as well as in people cataractous lenses.

Based on in vitro tests employing pancreatic tissue segments, it has been claimed that aerobic system in the stomach supplies only about 10% to oxidative phosphorylation. Its role in glycogenolysis in vivo is still unknown, though.

To know more about enzyme  Visit:

https://brainly.com/question/14953274

#SPJ1

Although Freud conceptualized the libido as the life energy within the id, many people think of it as the sex drive

Sigmund Freud was the one who first used the term "libido" to refer to the general need for pleasure, which is one of the main driving forces behind human behavior. The need for the species to survive itself, according to Freud, is what underlies this drive.

According to Freud, libido is the energy that stems from our instincts or urges, which govern how we behave. The life drive and the death drive are the two different categories of urges that he described. When we talk of the urge for life, we mean affectionate or emotional impulses.

For more information on libido kindly visit to

https://brainly.com/question/7986180

#SPJ4

Answer:

lions

Explanation:

I would prefer lions because of their size and looks.

a) When the concentration of ATP is low, phosphofructokinase becomes more active.

b) AMP performs opposite to the performance of ATP (adenosine triphosphate).

a) From the given graph, we notice that when the concentration of ATP is low, phosphofructokinase becomes more active. When there is a greater amount of ATP (adenosine triphosphate), the enzyme is inhibited and the bonding with fructose 6-phosphate is reduced. Low adenosine triphosphate concentrations cause the production of a hyperbolic curve, which is later converted to a sigmoidal curve by high ATP concentration. Fructose 6-phosphate can stimulate or activate phosphofructokinase.

b) Glycolysis is a biological process that splits sugars into three-carbon compounds, pyruvate, while simultaneously releasing two molecules of ATP and two molecules of NADH (nicotinamide adenine dinucleotide). Because this enzyme is controlled by glycolysis, glycolysis plays a key role in the phosphofructokinase process and activation. A high concentration of ATP inhibits enzymes and reduces the bonding with fructose 6-phosphate, whereas AMP reduces the effect of ATP on phosphofructokinase. AMP works in the opposite direction of ATP.

Learn more about the Phosphofructokinase here:

https://brainly.com/question/14331342

#SPJ4

The complete question is: The enzyme phosphofructokinase acts on fructose 6-phosphate at an early step in glucose breakdown. Regulation of this enzyme controls whether the sugar will continue on in the glycolytic pathway.

a) Using the graph, Identify the condition under which phosphofructokinase is more active.

b) Given what you know about glycolysis and regulation of metabolism by this enzyme, explain the mechanism by which phosphofructokinase activity differs depending on ATP concentration.

Answer:

1. Flat, faulty or dead battery

The battery’s usually the main culprit behind issues with starting your car. In fact, battery problems were the cause in over half of the cases (55%) where our Patrols were called out to a car that wouldn’t start.

2. Starter motor problems

Almost 7% of the cars we see that won’t start have a problem with the starter motor. The starter motor is connected to the car’s battery and sets the engine in motion when you start the ignition. A symptom of a faulty starter motor might be a loud click when you try to turn the key in the ignition. If there’s a problem with the starter motor, a mechanic will need to check it along with the car’s electrical system.

3. Fuel problems

Fuel problems are responsible for around 1 in 20 (5%) of the cases where we’re called out to a car that won’t start. That includes issues with the fuel pump and electrical or mechanical issues with the fuel system.

Through cell communication and signalling, the cell accepts, processes, and sends signals to link the external and internal environments. It is a quality that all living things require.

In a cell signalling process, clusters of molecules work together to trigger a chemical reaction that regulates the activity of the cell.The signalling molecules that cause the signal and generate biological reactions can bind to receptors on the surface of cells.In most types of eukaryotes, cell signalling is crucial for cell communication.For instance, the yeast uses an endocrine system for cell signalling that is comparable to the human insulin signalling mechanism.These unicellular prokaryotic life forms gave rise to multicellular eukaryotic organisms like plants and animals. Therefore, the discovery that prokaryotic and eukaryotic organisms (such as bacteria) have similar cell-signaling processes raises the possibility that this cellular characteristic descended from a shared ancestor.

Learn more about  cell communication here:

https://brainly.com/question/18223077

#SPJ4

Thus, we might draw the conclusion that the Theory of Evolution by Natural Selection does not include the Inheritance of Acquired Characteristics.

Teosinte was domesticated to become modern corn. Despite having contributed to the genetic diversity of current corns, Teosinte was purposefully introduced by humans and is not an example of selection.

The five ideas were as follows: (1) evolution as a whole, (2) common descent, (3) gradualism, (4) species diversification, and (5) natural selection.

To know more about Evolution visit:-

https://brainly.com/question/14935630

#SPJ1

name the general location along the villus are Cell Division is Crypt, Cell Differentiation is Ascending the villus, and Apoptosis is Apex of the villus.

In anatomy, villus, plural villi, refers to any of the teeny, thin vascular extensions that increase the surface area of a membrane. Important villous membranes include the placenta and the lining of the small intestine.

The lining of the small intestine is coated with minute protrusions that resemble hairs. They include blood vessels, which help with nutrition absorption.

The structure of the small intestine is ideal for nutrition absorption. The chyme, a liquid mixture created in the stomach from the food we eat, is absorbed by the villi that line the interior of the small intestine and contains nutrients.

Learn more about placenta from:

https://brainly.com/question/10437076

#SPJ4

Plasma membranes must permit some compounds to enter and exit a cell while blocking the entry of hazardous molecules and the exit of necessary ones.

In other words, plasma membranes selectively permit some compounds to pass through while blocking others. The cell would be destroyed if it were to lose its selectivity, which would prevent it from continuing to function.

Certain compounds are needed by some cells in greater concentrations than by other cells; these cells must have a method of acquiring these substances from the extracellular fluids.

The movement of specific materials back and forth may cause this to occur passively, or the cell may have unique processes to assure transit. Adenosine triphosphate (ATP) is the primary kind of energy.

Therefore, Plasma membranes must permit some compounds to enter and exit a cell while blocking the entry of hazardous molecules and the exit of necessary ones.

To learn more about plasma membrane, refer to the link:

https://brainly.com/question/14727404

#SPJ1