How can natural selection account for the long snout of an anteater ?

1 answer:

7 0

First of all, the purpose of natural selection is to "weed out" the organisms in a species with imperfect qualities. Basically, it's evolution's way of making the species that best it can be.

An anteater eats insects (namely, ants) by sticking its snout and tongue through anthills and the ground. Obviously, the longer the snout of the anteater, the more possible bugs it can reach and, therefore, eat. So, over millions of years, anteaters with shorter snouts were not able to reach enough bugs and ended up dying. The anteaters with longer snouts had more food available because they could reach more bugs, so they were able to live long enough to reproduce and produce offspring with the preferred trait: having a longer snout.

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Which term means a disease characterized by the simultaneous inflammation of voluntary muscles in many parts of the body?

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Answer:

polymyositis

Explanation:

Polymyositis is the disease in which inflammation of voluntary muscles and associated tissue occurs in various body parts. So it affects both sides of the body. Most of the weakness is seen in muscles of the shoulder, upper arm, thighs, neck, and hips.

This condition makes some jobs difficult for patients like difficulty in climbing stairs or lifting objects, etc. Women are at higher risk for this disease than men. Till now it's cure is not available but several therapies and physical exercise can help in gaining muscle strength.

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In interphase, the DNA is in the from of loose threads called?

Brut [27]

Answer:

Chromatin

Explanation:

In the process of cell cycle, a cell spends most of its life in a long stage known as interphase, which has three divisions: G₁, S, and G₂ phases. During interphase, the process of division begins when the DNA is replicated.

Furthermore, during this phase, the chromatin --genetic material composed of DNA and proteins-- is in a highly loose state that makes it appear like loose threads, an important factor that permits the replication and transcription of the DNA.

Therefore, in interphase, the DNA is in the from of loose threads called chromatin.

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What term is used in place of "recommended daily allowance" (RDA) when sufficient data are not available to establish RDA values

Fiesta28 [93]

Answer:

The term that is used in place of 'recommended daily allowance" when sufficient data are not available to establish RDA values for a specific nutrient is called Adequate intake (AI)

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This is used as a substitution of recommended daily allowance if sufficient evidence is not given to calculate the ERA.

Values are based on experiment where the value of mean nutrient is taken from a healthy group of people.

Foe example nutritional stages of normal growth,maintenance of normal circulating nutrient value or general health.

It is used to establish ERA when the information is inadequate.

It is an indication where more research is needed to determine the mean,distribution of requirement for a specific nutrient,degree of confidence etc.

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