In _____ gas exchange occurs at the body surface and gas is distributed by diffusion alone

a. earthworms c. frogs
b. flatworms d. insects


B

Biology & Microbiology

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With capture-recapture, the recaptured animals might not represent the population correctly because ________

a. they might return to traps preferentially b. they might avoid traps having been caught once c. all of the choices d. some animals may have lost their tags

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Which of the following is NOT a function of proteins?

A. Energy carrier B. Structure of bones C. Enzymes D. Hormones E. All of these are functions of proteins

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In electron transport, which respiratory complex is not involved in the flow of electrons from NADH?

A) complex I B) complex II C) complex III D) complex IV E) all of the above

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_____ different codons constitute the genetic code

a. 3 b. 20 c. 64 d. 120

Biology & Microbiology