Which of the following is of particular concern for causing damage by light energy?

a. higher-energy gamma radiation
b. lower-energy gamma radiation
c. higher-energy ultraviolet radiation
d. lower-energy ultraviolet radiation


Ans: c. higher-energy ultraviolet radiation

Biology & Microbiology

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What is the principal substance that causes

phototropism in stems or leaves?

a. auxin b. gibberellin c. abscisic acid d. ethylene e. all of these

Biology & Microbiology

The following statements about endotoxin are true EXCEPT

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Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

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Biology & Microbiology