What is the most appropriate term for a mature pollen grain?
a. megaspore
b. microspore
c. male gametophyte
d. female gametophyte
e. immature sporophyte
c
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Microcystis aeruginosa is a species of cyanobacteria. What CANNOT be true of this species?
A. It synthesizes organic molecules. B. It is an obligate anaerobe. C. Its cells contain an extensive thylakoid. D. It uses ammonia to produce proteins. E. It secretes mucilage.
The term weather differs from climate because
a. climate includes the barometric pressure, whereas weather does not. b. climate includes the dew point readings, whereas weather does not. c. climate includes both the barometric pressure and dew point readings, whereas weather does not. d. climate represents weather over time.
In secondary active transport, when both the driving ion and the transport ion are in high concentration outside of the
cell, in which direction will the two ions move?
a. As the driving ion moves in, the transport ion moves inb. As the driving ion moves in, the transport ion moves out c. As the driving ion moves out, the transport ion moves in d. As the driving ion moves out, the transport ion moves out e. As long as both ions are moving together, they can go either in or out
RNA was likely replaced by DNA as the genetic molecule in most organisms because:
a. RNA is less stable than DNA. b. RNA has a higher chemical stability. c. RNA errors are more easily corrected than DNA errors. d. A and C. e. All of the above.