Methylene blue
a. is used to kill cells that are moving too quickly to observe.
b. detoxifies cells so they are safe to handle.
c. is used as food for Physarum cells.
d. is a biological stain used to increase contrast of transparent cells.
b
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A mutation in the DNA of C. elegans will automatically lead to the production of a
nonfunctioning protein.
a. True b. False
Which of the following are symbiotic fungi for 80–90 percent of vascular plant species?
a. Mycoses b. Lichens c. Yeasts d. Mycorrhiza
If a small population of mice colonizes a new area away from the range of the original species, the colony that is
geographically isolated may eventually evolve into a new species. These events can be used to describe:a. hybridization. b. allopolyploidy. c. adaptive radiation. d. allopatric speciation. e. sympatric speciation
The hormone FSH stimulates the development of a follicle in the human female. As the follicle develops, it secretes estrogen. A high level of estrogen decreases the secretion of FSH. This mechanism is an example of
A. cell differentiation B. in vitro fertilization C. positive tropism D. negative feedback