Water is the most abundant molecule in the Earth’s atmosphere is false.
Answer:
1. Purines
2. States that DNA composition varies among species
3. Hydrogen Bond
4. Purines
<em>Answer to #2 is a little iffy </em>-- sorry
Explanation:
Pyrmidines have two rings
Purines have one ring
Complementary bases are connected by hydrogen bonds.
Answer:
D. Permian. This is when 96% of all species on the planet became extinct.
Exploring new sources of coal depositsAnswer:
Explanation:
sry if im wrong
A.vibrates with the frequency of the received sound
