Q: What do ocean mollusks use to absorb oxygen from the water? Choices: - shells - scales - pores - gills A:
gills

(Question)
Q: What are composed of an oxygen atom that forms single bonds with two carbon atoms? Choices: - sugars - solvents - acids - ethers A:
(Answer)
ethers

Ques: Q: What process within cells makes sure that every gamete receives a copy of every chromosome? Choices: - genomes - fission - mutations - meiosis A:
Ans: meiosis

(Q).
Q: What do you call an abnormal mass of cells that is dividing improperly? Choices: - bumps - appendages - molars - tumor A:
(A).
tumor

Ques:Q: By allowing blood levels of a hormone to be regulated within a narrow range, feedback loops contribute to maintaining what state? Choices: - hypothesis - hibernation - consciousness - homeostasis A:

Ans:homeostasis

Q: The direct conversion of a solid to a gas, without an intervening liquid phase, is called what? Choices: - amplification - isolation - insertion - sublimation A:
sublimation