I think the answer is B. Immigration must outpace emigration. Hope this helps!
Answer:
1) NH3->Product
2) NH4->Reactant
Explanation:
Reactants are the substances in with you start the chemical reaction with (before the arrow)
Products are the result (after the arrow)
Answer:
Brain structures called the hypothalamus and pituitary gland control the menstrual cycle.
Explanation:
Answer:
1. freshwater
2. estuary
3. intertidal
4. marine
5. deep
6. true
7. false (3 percent)
8. false (larger and deeper)
9. false (surface)
10. true
Explanation:
