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Fed [463]
3 years ago
9

The _______ system helps guard against infection, protect from UV radiation, and regulate body temperature? A. integumentary B.

immune C. circulatory D. endocrine
Biology
2 answers:
KiRa [710]3 years ago
6 0

Correct answer: A). Integumentary

The integumentary system composed of the hair, nails, skin, glands, and nerves. Its main function is to provide protection to the body against disease-causing infections such as bacteria and viruses and act as a barrier to harmful ultraviolet radiations, which are coming from the Sun.

It works in coordination with all the other system of the body in order to maintain internal body temperature which is essential for normal body functions. It also helps the body to eliminate waste products.

Hence the correct answer would be option A.


Molodets [167]3 years ago
5 0

The immune system helps guard against infection, protect from UV radiation, and regulate body temperature.

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3 years ago
Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). Only homozygous individu
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<span><u>The answer is A. 72.25 percent.</u>

The Hardy-Weinberg principle can be used:</span>

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where <em>p</em> and <em>q</em> are the frequencies of the alleles, and <em>p²</em>, <em>q²</em> and <em>2pq </em>are the frequencies of the genotypes.

<span>The <em>r</em> allele (<em>q</em>) is found in 15% of the population:
q = 15% = 15/100
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To calculate the <em>R</em> allele frequency (<em>p</em>), the formula p + q = 1 is used:
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Knowing the frequency of the <em>R</em> allele (<em>p</em>), it is easy to determine the frequency of the RR genotype (p²):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.</span>

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