Whales are ________ in the group ___________ arising most recently from a semi-aquatic group called the ____________

Fill in the blank(s) with the appropriate word(s).


Answer: Mammals, artiodactyl, archaeocetes

Biology & Microbiology

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During fermentation, what type of molecule is used to regenerate NAD+ from NADH?

a. an inorganic molecule b. oxygen c. an organic molecule d. water

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Approximately what percent of the energy that

enters a trophic level becomes available to the next trophic level? a. 2 to 12 b. 3 to 13 c. 4 to 14 d. 5 to 15 e. 5 to 30

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Testosterone and estradiol are male and female sex hormones, respectively, in many vertebrates. In what way(s) do these molecules differ from each other? Testosterone and estradiol _____

A) are structural isomers but have the same molecular formula B) are cis-trans isomers but have the same molecular formula C) have different functional groups attached to the same carbon skeleton D) are enantiomers of the same organic molecule

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Which of the following statements about fungi is FALSE?

A) Fungi are eukaryotes. B) Molds are multicellular. C) Fungi have a cell wall. D) Fungi are photosynthetic. E) Yeasts are unicellular.

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