Ques and Ans: What does the fishhook cactus release during the day but not during the night.
Options:
- (A) heat
- (B) Air
- (C) water
- (D) carbon monoxide
- (E) carbon dioxide
- (F) oxygen
- (G) Energy.
- (H) Energy
(F)
Logic for the answer: Plants release oxygen during the day but not during the night. Another kind of plant is the fishhook cactus. The fishhook cactus releases oxygen during the day but not during the night.


Ques and Ans: Electron transport requires which of the following?
Options:
- (A) electron microscope
- (B) sodium
- (C) Energy.
- (D) Oxygen
- (E) fission
- (F) warmth
- (G) flagellum
- (H) Energy
(D)
Logic for the answer: Electron transport is the final stage of aerobic respiration. Aerobic respiration occurs only in the presence of oxygen. Electron transport occurs only in the presence of oxygen.


Ques and Ans: Active immunity is when an immune response occurs after a germ produces what?
Options:
- (A) harmful substances
- (B) bioaerosols
- (C) rapid expansion
- (D) Allergies
- (E) anemia
- (F) it needs them
- (G) Chemical energy
- (H) memory cells
(H)
Logic for the answer: Active immunity results when an immune response to a pathogen produces memory cells. Pathogens are germs that cause disease. Active immunity results when an immune response to a germ produces memory cells.


Ques and Ans: What do cells secrete to maintain the proper ph for enzymes to work?
Options:
- (A) Energy
- (B) Chemical energy
- (C) water conservation
- (D) sweating
- (E) heat energy
- (F) aqueous solution
- (G) Organic compounds
- (H) electrolytes
(H)
Logic for the answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Cells secrete acids and bases to maintain the proper pH for enzymes to work. Acids and bases are electrolytes. Cells secrete electrolytes to maintain the proper pH for enzymes to work.