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MA_775_DIABLO [31]
3 years ago
14

In many hairy vertebrates, such as apes, dogs, and rats, the involuntary erection of hair acts as an efficient means of thermore

gulation. The erect hairs trap an insulating layer of air against the skin, keeping the animal warm. Humans also display hair erection when cold, though humans are not hairy enough for this reflex to have a significant effect on body temperature. Which statement is true regarding this reflex?
1) It reflects the common ancestry of humans with hairy vertebrates.
2) It suggests humans are less evolved than other hairy vertebrates, because they are not adapted to maintain body temperature.
3) The loss of hairy bodies is an evolutionary disadvantage to humans.
4) The reflex is actually a voluntary response humans manifest during infancy.
Biology
1 answer:
Liono4ka [1.6K]3 years ago
8 0

Answer:

It reflects the common ancestry of humans with hairy vertebrates.

Explanation:

Evolution is the change in the species with the passage of time. Some species might get extinct and some species might develop the advance character during the evolutionary process.

The evolutionary history of the organisms can be classified on the basis of the paleontological or molecular evidence. The two groups of the organisms can share a common ancestor if they have some similar features with each other. In the given question, it can be concluded that hairy vertebrates and human might have the common ancestor.

Thus, the correct answer is option (a).

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B. They become extinct

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2 years ago
Scientists studied reproduction in the New Zealand mud snail. They wanted to determine whether reproducing sexually or asexually
lubasha [3.4K]

A hypothesis is a claim that expresses a relationship between variables. D) Asexual reproduction is advantageous over sexual reproduction because it decreases the snails’ need for social interaction.

<h3>What is a hypothesis?</h3>

A hypothesis is a scientific conjecture, not verified, that requires corroboration. It is a possibility, but not a fact. It is a claim of how it works a relationship between two or more variables.

The researcher hypothesizes in order to predict what is going on or what is expected to occur.

A hypothesis must express what is expected to occur in a perfectly comprehensive manner. There must be a logical relationship between the involved variables. It must be objective. Usually, it is written in the present time.

There are different kinds of hypotheses: descriptive, correlative, differentiative, or causative.  

In the exposed example, researchers wanted to determine whether reproducing sexually or asexually was more beneficial for the snails.

Options,

A) <em>Sexual reproduction is advantageous over asexual reproduction because it reduces the rate of mutation accumulation. </em>

The benefit of reproducing sexually is that the risk of mutation is lower.

B) <em>Asexual reproduction is advantageous over sexual reproduction because it allows the snails to produce more offspring.</em>

<em />

The benefit of reproducing asexually is that a higher number of descendants are produced, which increases reproductive success.

C) Sexual reproduction is advantageous over asexual reproduction because it allows for snails to have increased genetic variation.

The benefit of reproducing sexually is that it increases genetic variation.

D) Asexual reproduction is advantageous over sexual reproduction because it decreases the snails’ need for social interaction.

The benefit of reproducing asexually is that there is no need for social interaction.

Social interaction does not really benefit snails as a species. This is not a variable that might influence in a significant way snails.

However, variables like the mutation rate, variability, and the number of descendants are useful to test how they benefit or not the snails.  

The hypotheses that would least likely aid the scientists to answer the question is <u>option D</u>.

You can learn more about hypothesis at

brainly.com/question/2657326

brainly.com/question/24897727

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3 0
1 year ago
Which of the following was the most likely effect of the Industrial Revolution on peppered moths in cities?
jeka57 [31]
The answer is d. The population of light-colored moths decreased and the population of dark-colored moths increased.

<span>Peppered moth color variation is a good example of natural selection. During the Industrial revolution, due to pollution, trees become darker in the urban area. Light-colored moths were, thus, easy prey. The dark-colored moths were able to camouflage on dark trees and avoid predators. The phenomenon is known as industrial melanism. So, in polluted urban areas, the number of dark-colored peppered moths increased. In the clean environment, were much effective in hiding from predators and they outnumbered the dark-colored moths.</span>

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3 years ago
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