18: D, homologous
20: B, DNA
I can’t see 17 or 19!
Alpine Tundra are found at the tops of tall mountains.
And it differs because the <span>Arctic refers to Northern latitudes, alpine refers mountainous regions.</span>
1. two points
2.respiratory and organs
3.heart and heart
4.homogenous process/system
club drugs: lsd cause rapid heart rate
hallucinogens: bath salts causes hallucinations and can be dangerous to self and others