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Posted in Biology

Explain why a population of Mouflon in the Indian Ocean descended from only two individual that had not experienced a loss of genetic diversity was so surprising to scientists.


When populations are dramatically reduced in size, the theory of genetic drift suggests that a loss of genetic diversity should be expected. In the case of the Mouflon, however, no such loss in diversity was observed. This result was extremely surprising to scientists because it meant that the theory of genetic drift does not always hold true.

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Posted in Biology

The large size of the musk ox _______. a. helps minimize heat loss b. is offset by its long legs c. helps the animal graze less often d. helps maximize heat loss

Answer:

A.  Helps minimize heat loss

Explanation:

The musk ox is found in cold climatic regions. Its larger body size imparts it a smaller surface area relative to its volume. The lesser surface area, relative to its large volume, exposed to the surroundings helps the organism to lose less heat. Hence, a smaller surface area to volume ratio of musk ox, as contributed by its larger body size, help it to stay warm in cold climates.

Posted in Biology

Which of the following represents a weakness of the biopsychosocial model? A. Treatment often requires collaboration with medical doctors. B. Individuals’ emotions can affect their physical illnesses. C. Patients can be active participants in their treatment. D. The model is effective in all counseling professions.

The biopsychosocial model is a broad view that attributes disease outcome to the intricate, variable interaction of biological factors, psychological factors, and social factors. I think the correct answer from the choices listed above B. It would that individuals’ emotions can affect their physical illnesses represents a weakness of the biopsychosocial model. Hope this answers the question.

Posted in Biology

A biologist is writing a report about a group of rattlesnakes that all live in the state of Florida. All rattlesnakes in this group can breed with one another and produce offspring that can reproduce together. The report includes statistics about the number of these rattlesnakes, their breeding rate, and the ranges of their sizes and other traits. In this report, the biologist is describing? A.a community in Florida. B.a biome in Florida. C.a population in Florida. D.an organism in Florida.

Answer:

The correct answer is option C, a population in Florida

Explanation:

The population description is an efficient language is termed as demographics. The descriptive components of the demographics are –  

a) Population Size – It gives the number of individuals within a population

b) Population Density – It defines the size of a population with respect to the space occupied by it

c) Age Structure of the Population – It categorizes different individuals in a population group to different age sections

d) Fecundity – It describes about an individual that is able to produce during a given period of time  

e) Morality – It gives the death and birth rate of a population

f) Sex ratio

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Which best describes reproduction? Asexual reproduction may lead to an accumulation of mutations in the DNA. Sexual reproduction allows for diploid gametes to combine to increase genetic variation. Asexual reproduction leads to the formation of haploid gametes. Sexual reproduction allows for more gametes to be formed than asexual reproduction does.

The best and most correct answer among the choices provided by the question is the second choice. The statement "Sexual reproduction allows for diploid gametes to combine to increase genetic variation." best describes reproduction. I hope my answers has come to your help. God bless and have a nice day ahead!

Posted in Biology

Why do you think plasmids and bacterial cells are such important tools in genetic engineering?

Plasmids contain extra nucleoid genitic material. By virtue of plasmids bacteria have won their battle againt the miracle drugs like penicillin, streptromycin, asprin etc. Well genitic engineering retrieves their adapted and evolved tendencies to be applied for a long lasting cure.


I hope my answers has come to your help. God bless and have a nice day ahead!

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Which is a potential negative consequence of using genetically engineered medicine? A.Gene markers that are resistant to antibiotics are used, providing the possibility for humans to have increased antibiotic resistance. B.Products that are used to genetically engineer medicine are poisonous. C.Restriction enzymes are used to create the medicine and have been known to cause cancer. D.Medicine that is created this way is less effective than medicine that is created the traditional way.

I think the correct answer from the choices listed above is option A. A potential negative  consequence of using genetically engineered medicine would be that gene markers that are resistant to antibiotics are used, providing the possibility for humans to have increased antibiotic resistance. Hope this answers the question. Have a nice day.

Posted in Biology

Which evidence did Carl Linnaeus use to classify organisms? A.physical characteristics B.evolutionary history C.physical characteristics and evolutionary history D.physical characteristics, genetics, and evolutionary history

I think the correct answer from the choices listed above is option C. The evidence that Carl Linnaeus used to classify organisms are physical characteristics and evolutionary history. Carolus Linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. Hope this answers the question.

Posted in Biology

Scientists use critical thinking skills throughout the process of research and experimentation. Why is it important for scientists to remain open-minded about the information they come across in their experiments? a. It prevents them from injecting bias into their experiments. b. It allows them to inject bias into their experiments. c. It improves the accuracy of the information. d. It lowers the accuracy of the information.

I think the correct answer from the choices listed above is option A. It is important for scientists to remain open-minded about the information they come across in their experiments in order to prevent them from injecting bias into their experiments. Experiments ans researches should be done in an unbiased way. Hope this answers the question. Have a nice day.

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Deep-ocean lantern fish have special organs that use chemical energy to produce light. However, the light can only travel a certain distance through the water before it is no longer visible. How does this phenomenon validate the Law of Conservation of Energy? The fish is a closed system, so energy is allowed to exit the system. The Law of Conservation of Energy applies to biological, not physical, systems. The light energy travels through the water until it is reflected or absorbed. The light is not carried by matter and contains no energy.

Answer:

The correct answer is that the light energy travels through the water until it is reflected or absorbed.

Explanation:

The law of conservation of energy is illustrated as the form of energy that cannot be destroyed or produced, however, it gets transformed from one form to another. In case of Deep Ocean lantern fish that generates light in water, which travels along certain distance and then moves back, that is, in the reverse direction. This happens as the light travels in waves and when it comes in contact with the waves, it either gets absorbed or is reflected back.

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Posted in Biology

Does mitosis more closely resemble meiosis 1 or meiosis 11? Explain your answer.

The answer would be meiosis 2 because in this separation of sister chromatids occur which is similar if not identical to mitosis.

Posted in Biology

Explain what has to happen to join 2 monosaccharide units into a disaccharide.

A disaccharide is produced by joining 2 monosaccharide (single sugar) units.  For example 2 glucose molecules are combined using a condensation reaction with the removal of water.

Posted in Biology

HELP!! Bernoulli's principle is a theory given the name "principle" because A. it is actually more like a hypothesis B. nearly all scientists agree that it is correct C. it is one of the first things you would learn about in college D. you can't provide evidence for it, but scientists know that it is correct

Answer:

The correct answer will be option- B.

Explanation:

A scientific theory is a well-substantiated idea which explains any natural phenomenon in depth. The theory is a rational abstract which is based on the generalized thinking.

A principle is a rule or concept that explains the way a system is constructed. A principle can be always proved by the scientist due to which it is followed by the people or has to followed.

Since the Bernoulli's principle can be proved at any point of time with experiment giving the same results and consequences which has been performed by many scientists.

Thus, Option-B is the correct answer.

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Posted in Biology

How do scientists think the earliest cells formed?

The earliest cells were formed by cells that don't need oxygen to survive but they did produce oxygen to the water. The oxygen got sucked up by iron deposits in the waters at first. Then the oxygen started to oxygenate the water and air where as evolution interfered eucryotic cells formed and evolved creating life with a Biosphere.

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Posted in Biology

Based on figure 9-4, which pathway is most efficient at producing energy for a cell? Explain your answer.

Answer:

The correct answer would be pathway C.

Pathway C represents aerobic respiration whereas pathways A and B represent fermentation.

Under aerobic respiration, the cell or organism is able to completely oxidize the glucose.

It produces a large amount of energy (approximately 36-38 ATP) as compared to the fermentation which only produces two molecules of ATP.

Most of the reactions of aerobic respiration take place in the mitochondria.  

It includes glycolysis, pyruvate decarboxylation, Krebs cycle, electron transport chain, oxidative phosphorylation.

Posted in Biology

Why is it necessary to eliminate absolutely all invasive fire ant colonies to eradicate the invasive population?

Because if fire ant colonies were left alone, they would reproduce more colonies, and the new colonies would do the same.

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The endosymbiotic theory helps to explain the origin of which structures?

The origin of Chloroplast, because they have their own RNA.

Posted in Biology

Briefly describe the DNA transcription process, which involves the transfer of the DNA genetic code onto an mRNA molecule. Include in this answer the role of enzymes.

In the simplest sense, expressing a gene means manufacturing its corresponding protein, and this multilayered process has two major steps. In the first step, the information in DNA is transferred to a messenger RNA molecule by way of a process called transcription. During transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase 2 catalyzes the formation of a pre-RNA molecule, which is then processed to form a mature RNA. The resulting RNA is a single-stranded copy of the gene, which next must be translated into a protein molecule.

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Biology is an interdisciplinary study. Explain what that means in your own words. Give a detailed example or story—from the news, from your life, or from the lives of people you know—that clearly illustrates the interdisciplinary nature of biology and the importance of biology in the world around you.

Biology is an interdisciplinary study, which means that it relies on and depends on many other studies. You cannot always study biology without paying attention to other sciences as well, because they are so interconnected. For example, history and biology are connected - in biology, you study evolution, which is how beings evolved through history. Also, physics is important to biology - various chemical process that take place in both humans and other living beings is what both chemistry and biology study. Geography and biology are also closely-knit, given that geography has to do with the Earth and its ground on which plants and other living beings exist. 
Hope this helps! :)

Posted in Biology

Angelina observes that her gardener cuts the tips of her ornamental plants at regular intervals of about 10–15 days. When she asks him why he does this, he tells her that this allows the tree to grow faster and bushier. How would you explain this scientifically?


Cutting the tips of the plant stops the secretion of Auxins, which are present in the apical meristems. This stimulates the growth of the axillary and lateral buds, causing the plant to branch out.

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Posted in Biology

In 1939, the use of DDT (a powerful synthetic chemical) as an insecticide was discovered. The United States adopted its widespread use, producing up to 100 million kilograms per year (200 million pounds per year). Twenty years later, severe side effects started to be reported as a result of DDT use. Which was an advantage of using DDT? insect and pest populations decreased birth defect rates increased cancer rates increased fertility rates decreased

The answer is insect and pest populations decreased.


DDT (dichlorodiphenyltrichloroethane) was used as an insecticide which is a substance used to kill insects. That resulted in decrease in insect and pest populations. It is a persistent and non-degradable insecticide, but as well organic pollutant readily accumulated to soils and consequently affects organisms.

Posted in Biology

The one-toed horse of today steadily evolved from its five-toed ancestor. Which theory of evolution can explain this example? A: adaptive radiation B: punctuated equilibruim C: gradulism

The answer is C: gradulism.

Gradualism describes the rates of speciation. It means that evolutionary changes in species are slow, gradual and continuous process. In our example, The one-toed horse of today steadily evolved from its five-toed ancestor. Steadily is the key word. So, the change was slow and continuous process.

If the change were rapid, this would be an example of punctuated equilibrium.

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