Some prokaryotic cells possess a gel-like sheath called a
What will be an ideal response?
capsule
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The SOS regulatory system is activated by
A) the activity of DNA polymerase IV. B) DNA damage. C) transcription of LexA. D) repression of RecA.
Osmosis can be characterized as: a. associated with an organism's salinity
b. a very important and challenging part of a marine organism's survival. c. all of these choices. d. the movement of water across a membrane due to solute concentrations.
In the study of Gigord and colleagues using Elderflower orchids, the allele frequencies of yellow and purple flowers varied such that when the yellow allele started to become rare, the reproductive success of purple flowers decreased and the
reproductive success of yellow-flowered individuals increased in a process known as ________. A) overdominance B) frequency-dependent selection C) underdominance D) Hardy-Weinberg stabilization E) frequency depression
Water-storing plants and deeply rooted shrubs are plants that characterize ________
A) tropical forests B) chaparral C) deserts D) savanna