The needles of pines and other conifers are adapted to:
a. conserve water.
b. defend against herbivores.
c. reduce the effects of intense sunlight.
d. reduce the effects of snow and ice.
e. reduce the effects of wind.
a
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Single cell protein
A. refers to the use of single-celled organisms as a protein source. B. refers to a single-protein produced by several different organisms. C. is an enzyme. D. causes food intoxication.
A shift from expected allele frequencies, resulting from chance, is known as
a. natural selection. b. genetic drift. c. mutation. d. gene flow.
What is the function of the protein titin?
A. It binds to myosin heads, enabling shortening of the muscle fiber. B. It attaches the myosin thick filament to the Z disk at the end of the sarcomere. C. It transports calcium into and out of the cell. D. It regulates contraction of muscle cells.
Aspergillus and Penicillium are related because
both a. produce antibiotics. b. reproduce sexually using ascospores. c. are club fungi. d. parasitize human mucous membranes. e. lack known sexual stages