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nadya68 [22]
3 years ago
10

An enormous cloud of gas and dust that contracts due to gravity and forms stars is a

Biology
2 answers:
Free_Kalibri [48]3 years ago
8 0

the answer is A. nebula


B. makes no sense. A galaxy is a large grouping of solar systems.

C. Constellation. is wrong. a constellation is a pattern of stars that are visible from the surface of the Earth.

D. meteoroid. is also wrong. Meteoroids are large, pieces of rock that are floating in space that have no life, and contain numerous minerals.

ale4655 [162]3 years ago
5 0

An enormous cloud of gas and dust that contracts due to gravity and forms stars is called a nebula.


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A student creates a list of characteristics for a human cell and a virus. 1. smaller than an organelle 2. absence of metabolic a
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1, 2, and 5

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Based on this information, we can see that the correct statements are statements 1, 2, and 5.

4 0
3 years ago
Approximately 21% of the human genome is comprised of nucleotides containing C. Given this information, calculate the percentage
azamat

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(a) 21% of the human genome is comprised of G.

(b) 29% of the human genome is comprised of T.

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Explanation:

According to Chargaff's rule, a DNA molecule has the same amount of pyrimidines (T and C) as purines (A and G), and G pairs with C and A pairs with T.

If 21% of the genome contains C, then 21% also contains G.

Therefore 21% + 21% = 42% of the genome is comprised of G+C.

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