Continents has shifted millions and million years ago
Answer: B
Explanation: because birth and immigration is making the group bigger zero deaths and animals leaving
Answer: I believe the right answer is B) atmospheric nitrogen→bacteria→plants→animals. I'm pretty sure!
Sorry for answering a bit late, hope that helps! :-)
The answer is C. If you search it up it will show that the answer is c.
CH3- methyl group
COOH- carboxyl group
H2O- just water
NH2- amino goup
OH- hydroxyl group
the answer is H2O
