Some prokaryotic cells possess a gel-like sheath called a

What will be an ideal response?


capsule

Biology & Microbiology

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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.

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

Water-storing plants and deeply rooted shrubs are plants that characterize ________

A) tropical forests B) chaparral C) deserts D) savanna

Biology & Microbiology