What did R. H. Whittaker base his five kingdom classification upon?

a. DNA sequencing analysis
b. The size and color of cells
c. The biochemical make-up of an organism
d. Cell structure and how an organism derived its nutrition
e. The ability to for an organism to reproduce and develop


d

Biology & Microbiology

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Tetanus prevents the release of neurotransmitters from

A. muscle cells. B. excitatory neurons. C. inhibitory neurons. D. tetano cells.

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__________ is the evaporation of water from plant parts, mainly at stomata, into air. Fill in the blank(s) with the appropriate word(s)

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There are how many different kinds of amino acids

in proteins? a. 3 b. 6 c. 12 d. 20 e. 28

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