Populations
a. are only limited by one factor at a time.
b. increase arithmetically.
c. may increase indefinitely.
d. are limited by the carrying capacity.
e. overcome limiting factors by increasing their
biotic potential.
Answer: d
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According to research done by Baron and Prado, how do prions move within the CNS?
a. They use receptors on the surfaces of nerve cells. b. They use vesicles found inside the nerve cells. c. They use tunneling nanotubes. d. They pinch off the nerve cell membrane. e. They stick to the outer surfaces of nerve cells.
Meselson and Stahl proved that
A. DNA contains nitrogen. B. DNA replicates in a semi-conservative manner. C. DNA is made from nucleotides. D. DNA is the genetic material.
The functional differences, as well as differences in three-dimensional structures, between two different enzymes from E. coli result directly from their different:
A) affinities for ATP. B) amino acid sequences. C) roles in DNA metabolism. D) roles in the metabolism of E. coli. E) secondary structures.
Which division of the human nervous system carries signals to skeletal muscles?
A) parasympathetic nervous system B) sympathetic nervous system C) motor system