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Klio2033 [76]
3 years ago
7

Why do A and T (and G and C) pair in a DNA double helix?

Chemistry
1 answer:
Usimov [2.4K]3 years ago
3 0
I just took a quiz on this! It's D!
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This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number of protons from the mass number. Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.

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Aneli [31]

Answer:

I think it's the last one.

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Because gravity is what makes our planets stay still and stops our planets from dropping and as they orbit around the sun that's what keeps the moon from bumping into earth. I hope this helps and makes sense.

<h3>p.s. can I pls be ur brainliest answer, I'd appreciate it </h3>
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