Which of the following account for 20% of the greenhouse gases recorded annually?
a. deforestation of dry tropical forests
b. deforestation of moist tropical forests
c. burning of fossil fuels
d. burning of coal
e. urbanization
B
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To see the structure of DNA, what type of
microscope would you use?
a. fluorescence microscope b. phase contrast microscope c. compound microscope d. dissecting microscope e. electron microscope
Which of the kingdoms in the six kingdom system of classification was once grouped with plants?
a. Animalia b. Carnivores c. Fungi d. Protista
A channel that opens in response to the binding of a specific molecule, which is usually NOT the solute that passes through the channel is called a(n)_____.
a) positive-gated channel b) ligand-gate channel c) voltage-gated channel d) electric-gated channel e) charge-gated channel
A sac fungus is exposed to a mutagen, and it mutates so that it cannot produce a functional ascocarp. The most likely consequence is
A. this is a vestigial structure, so there is no consequence. B. fruiting bodies would not occur. C. asexual spores would not be produced. D. lichens could not form. E. cellular metabolism could not occur.