The answer is number two I believe
The main purpose is communication. like when you stub your toe , your nervous system communicates to your brain to react and have pain
D is the answer....tornado damage can not be used to determine both the weather and climate of a region
1.a
2.c
3.a
4.a
have a good day!!
<span>A terminal node is the hypothetical last common ancestral interbreeding population of the taxon labeled at a tip of the cladogram. An internal node is the hypothetical last common ancestral population that speciated (i.e., split) to give rise to two or more daughter taxa, which are thus sister taxon to each other</span>
