Q: What are prepared by the oxidation of secondary alcohols? Choices: - protons - more alcohol - ions - ketones A:
ketones

(Question)
Q: Developing cars that run on hydrogen gas can help solve our dependence on what? Choices: - oxygen - food - water - nonrenewable fossil fuels A:
(Answer)
nonrenewable fossil fuels

Ques: Q: What are solid lipids that animals use to store energy called? Choices: - steroids - cholesterol - hydrocortisol - fats A:
Ans: fats

(Q).
Q: Because they spread seeds, fruits are an agent of what? Choices: - propagation - disposal - predation - dispersal A:
(A).
dispersal

Ques:Q: Which system in the human body consists of the heart, a network of blood vessels, and blood? Choices: - cardiac system - nervous system - circulatory system - cardiovascular system A:

Ans:cardiovascular system

Ques: Q: Which cells change the accessibility, transcription, or translation of a gene? Choices: - endogenous - prokaryotic - ribosomes - eukaryotic A:
Ans:
eukaryotic