Due to biological magnification, which of the

following have the highest concentration of a
chemical herbicide?



a. grass- the dominant primary producer
b. cow- an herbivore
c. grasshoppers - an herbivore
d. mice - predators of butterflies
e. hawk - predators of mice


E

Biology & Microbiology

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All of the following are important characteristics of a nerve signal EXCEPT

a. the type of energy. b. the number of sensory cells stimulated by the same event. c. the duration of the sensory signal. d. the continuity of the sensory signal

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The tissue found in the center of a eudicot root is

a. xylem. b. endodermis. c. cortex. d. phloem. e. pericycle.

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The molecule below is a(n)



A. glycerol.
B. polypeptide.
C. saturated fatty acid.
D. unsaturated fatty acid.

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In eukaryotes, each type of RNA polymerase recognizes a different

A. start codon B. stop codon C. promoter D. transcription factor E. release factor

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