Bacteria are most essential in the cycling of:
a. carbon.
b. water.
c. phosphorus.
d. nitrogen.
e. energy.
D
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As shown in Figure 25.1 (and reproduced here), atmospheric CO2 levels oscillate over the course of the year. What season would you expect oxygen levels to be highest?
A. summer B. fall C. winter D. spring
The Nernst Equation is: __ = 60 mV log10 ([Xextracellular/Xintracellular]). What should fill in the blank here to complete this equation?
A. the equilibrium potential B. the membrane potential C. the action potential D. resting potential E. refractory potential
In the figure above, the viral DNA in the
lysogenic pathway
a. has been destroyed by host bacterial enzymes. b. is integrated into the bacterial chromosome. c. has been copied and changed into bacterial DNA. d. is no longer present. e. has been transcribed into RNA
Alterations to the positioning of the testes in males serve the purpose of ________
A) allowing more room for the urethra B) adjusting the temperature needed for production of healthy sperm C) allowing glands to release their contents D) allowing for an erection to occur