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prohojiy [21]
3 years ago
6

What is the approximate percent of oxygen by volume present in Earth's lower atmosphere?

Biology
1 answer:
Svetlanka [38]3 years ago
4 0

Answer:  21 percent

Explanation:

According to NASA, the gases in Earth's atmosphere include: Nitrogen — 78 percent. Oxygen — 21 percent. Argon — 0.93 percent.

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kogti [31]

Answer: C

Explanation:

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In chickens the dominant allele Cr produces the creeper phenotype (having short legs). However, the creeper allele is lethal in
Svetllana [295]

Answer:

66.6% of the living progeny would be creepers

Explanation:

The creeper allele is Cr for both parents this means that there is a 50% chance that they will pass the C or r trait to their progeny. In this scenario the deleterious inheritance of rr will be 25% so this will not be factored in this answer. The other progeny is CC 25% and Cr 50% for genotype only

The new calculation for living progeny is this: Of the chances of three living progeny there could be one normal CC and two creepers Cr. This means that 33.3% of the living progeny is normal CC and 66.6% of the living progeny are creepers Cr.

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3 years ago
Human growth hormone is genetically engineered and inserted into human tissue to help simulate growth in people with dwarfism. W
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Answer: Scientists must be concerned about the impacts it causes on normal people due to aging.

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The Human growth Hormone can also cause tumors in brain and also indulge in growth  and development of Cancer Cells in people who has cancer or had been diagnosed before.So these are the main side effects that scientists should rectify in Human Growth Hormone.

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3 years ago
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Answer= A is the correct answer :)
Hope that helped
7 0
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The tightly controlled process by which immunoglobulin genes rearrange such that only a single heavy chain and light chain are e
melamori03 [73]

The mechanism of somatic recombination known as V(D)J recombination only takes place in developing lymphocytes at the beginning of T and B cell maturation. As a result, B cells and T cells, respectively, have a very varied repertoire of antibodies/immunoglobulins and T cell receptors (TCRs).

<h3>What are immunoglobulin genes ?</h3>

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Learn more about Immunoglobulin genes here:

brainly.com/question/7263907

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8 0
2 years ago
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