The problem of not being able to cultivate most microorganisms has led to the use of
A. FISH.
B. microscopy with fluorescent dyes.
C. 16s rRNA analysis.
D. DGGE.
E. All of these methods help identify microorganisms in the environment.
E. All of these methods help identify microorganisms in the environment.
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Which of the following mechanisms can drive evolution?
A) Mutations B) Genetic drift C) Natural selection D) All of the above
The movement of chemicals through ecosystems is known as
A. community ecology. B. biogeochemical cycling. C. biomagnification. D. global warming E. pollution
One of the components of a cell’s cytoskeleton is composed of
a. plastids. b. cytoplasm. c. microtubules. d. chromosomes.
Suppose an animal cell was placed in a beaker of solution. The cell immediately began to swell and ultimately burst. Why did this happen?
a. because the cell's cytoplasm was hypotonic to the solution, which was isotonic b. because the cell's cytoplasm was hypertonic to the solution, which was hypotonic c. because the cell's cytoplasm was hypertonic to the solution, which was isotonic d. because the cell's cytoplasm was hypotonic to the solution, which was hypertonic