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tatuchka [14]
2 years ago
9

Which invention allowed scientists to discover cells?

Biology
1 answer:
miskamm [114]2 years ago
6 0

Answer:

microscope

Explanation:

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The DNA of a certain organism has adenine as 40% of its bases. What percentage of its bases would be guanine?
Mandarinka [93]

Answer:

The correct answer is B)10%. See the explanation below, please.

Explanation:

We use the following equivalence, remembering that Adenina pairs with Timina and Guanina with Cytosine:

A=T   ; C=G   A+G=T+C

If A= 40% ----> T=40%

A+G=T+C

40%+G= 40% +C   ---->  40+10=50

G=C=10%

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The rock will be 28 after two half lives
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