____ have the most efficient respiratory system of any living vertebrate

a. Amphibians
b. Birds
c. Mammals
d. Fish
e. Nonavian reptiles


b

Biology & Microbiology

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Which of the following is NOT a steroid

hormone?

a. testosterone b. epinephrine c. cortisol d. aldosterone e. all of these are steroid hormones

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The presence of which of the following features

distinguishes prokaryotic cells from eukaryotic cells? a. cytoplasm b. nucleus c. ribosomes d. plasma membrane e. DNA

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Which of the following are not photosynthetic pigments?

A. chlorophylls B. carotenoids C. leukophylls D. phycobilins E. All of these choices are correct.

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The conversion of amino acids to carbohydrates is an example of

A. amination. B. gluconeogenesis. C. substrate-level phosphorylation. D. beta-oxidation. E. electron transport.

Biology & Microbiology