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
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Fishes that exhibit a sedentary lifestyle have ____ bodies
a. fusiform b. laterally compressed c. globular d. flattened e. streamlined
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
The following statements about endotoxin are true EXCEPT
A) Endotoxins are known to be pyrogens. B) Endotoxin can be part of the PAMP recognized by PRR. C) Endotoxins produced by enterics such as Escherichia coli are also known as enterotoxin. D) Endotoxins are produced by gram-negative bacteria. E) Endotoxin is the toxic portion of the LPS.
Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to
A) increase. B) decrease. C) stay the same. D) The answer cannot be determined based on the information provided.