The spermatogonium is cell number
a. 2.
b. 3.
c. 4.
d. 5.
e. 6.
E
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Most of the water taken up by a plant is _____
A) used as a solvent B) used as a hydrogen source in photosynthesis C) lost during transpiration D) converted to carbon dioxide E) used to keep cells turgid
The fungal-plant root combination is referred to as
a. mycorrhizae. b. symbiosis. c. hyphae. d. mycelia. e. lichen.
Amino acid breakdown by the liver produces _____ , which is very toxic to cells
Fill in the blank(s) with the appropriate word(s).
What type of procedure is appropriate to isolate revertants from a population of threonine auxotrophic cells?
A. Threonine auxotrophic revertants could not be isolated on any type of media. B. Grow the auxotrophic cells on an agar plate without threonine; any colonies that form are presumed revertant. C. Grow the auxotrophic cells on and agar plate with threonine; any colonies that form are presumed revertant. D. Grow the auxotrophic cells in broth with threonine; if the broth becomes cloudy, revertants are presumed present.