Q: Plants reduce nitrate back to what before incorporating the nitrogen into organic compounds:? Choices: - phosphate - sulfide - phosphate - ammonium A:
ammonium

(Question)
Q: What happens to most of the energy in a trophic level as it passes to the next higher level? Choices: - it increases - it is transferred - it stays the same - it is lost A:
(Answer)
it is lost

Ques: Q: People with osteoporosis have an increase risk of what? Choices: - cancer - muscle loss - weight loss - bone fractures A:
Ans: bone fractures

(Q).
Q: Why do people build dams and levees? Choices: - to horde the water - increase flooding - store drinking water - prevent flooding A:
(A).
prevent flooding

Ques:Q: Patients with familial hypercholesterolemia have life-threatening levels of cholesterol because their cells cannot clear what particles from their blood? Choices: - iron (Fe) - oxygen (O) - high - density lipoprotein (hdl) - low-density lipoprotein (ldl) A:

Ans:low-density lipoprotein (ldl)

Q: Exemplified by a lit match bursting into flame or the process that forms fossil fuels, chemical reactions vary greatly in terms of what? Choices: - duration - density - power - speed A:
speed