The correct answer is hypertonic
The troposphere has the highest density.
Here are the four postulates of natural selection, according to Charles Darwin:
1. variability - refers to different mutations that create different species
2. heritability - refers to the genes that are passed from one organism onto its descendants
3. overproduction of offspring - refers to the fact that more "children" is born than dies
4. natural selection - refers to those organisms that survive because they adapt to their surroundings better than those who will die
<span>Because plants and animals can't make some of the nitrogen we need in order to live.</span>
Answer:
True
Explanation:
Because they come across many challenges
