Answer:
Tricuspid valve: Allows blood to pass from the right atrium to the right ventricle; prevents blood from flowing back into the right atrium as the heart pumps (systole).
Explanation:
I believe the answer is organic compound
Answer: a
Explanation:
Because the top predictors only eat meat, and not the plants, so if you take out the primary consumers, then the top predictors will begin to die out.
If our eyes were sensitive only to x rays the world would appear dark because X-ray light does not reach Earth's surface.
Answer:
I'm pretty sure the first one is c. The second one is b.
Explanation:
