A wildfire comes into an area of 300 trees and destroys all but 10 of them. Eventually, the 10 trees will reproduce and create more trees. What is this
situation an example of?
A genetic drift
B gene flow
C bottleneck

C, Bottleneck

Explanation:

A bottleneck effect is defined as when "A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events."

The forest fire is the enviornmental event in this situation, and the population was greatly reduced.

format change of dna.  

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.