In prokaryotes, the concentration of cAMP
a. increases with increased glucose concentration.
b. decreases with increased glucose concentration.
c. negatively regulates operons such as the lac operon.
d. makes CAP.
e. degrades CAP.
B
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The green sulfur bacteria are ________.
A. facultative anaerobes B. microaerophilic C. obligate anaerobes D. either obligate anaerobes or facultative anaerobes
Which of the following encases a nematode body and provides it with support?
a. cuticle b. hemocoel c. spiracle d. chitin
Scientists have found that bluegill sunfish receive the highest energy return from large Daphnia, an intermediate return from medium Daphnia and the smallest return from small Daphnia. If you were to stock aquaria with equal proportions of small, medium, and large Daphnia, but vary the density of Daphnia from very low to very high, how do you think bluegills would react?
A. Bluegills would consume a larger proportion of small Daphnia in the very low density aquaria compared with the medium or high density aquaria. B. Bluegills would consume equal proportions of large Daphnia in all aquaria. C. The tendency to select large Daphnia over small or medium Daphnia will increase as the density of Daphnia in the aquaria increases. D. In medium density aquaria, bluegills would select medium sized Daphnia over small or large Daphnia.
Black eyes are dominant to orange eyes, and green skin is dominant to white skin. Sam, a MendAlien with black eyes and green skin, has a parent with orange eyes and white skin. Carole is a MendAlien with orange eyes and white skin. If Sam and Carole wereto mate, the predicted phenotypic ratio of their offspring would be _____.