Which of the following is the best definition of generation time in a bacterium?
A. the length of time it takes to reach the log phase
B. the length of time it takes for a population of cells to double
C. the time it takes to reach stationary phase
D. the length of time of the exponential phase
Ans: B. the length of time it takes for a population of cells to double
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An animal that can fertilize its own eggs is
A. a synchronous hermaphrodite. B. a sequential hermaphrodite. C. producing asexually. D. a protrandous hermaphrodite. E. a protogynous hermaphrodite.
There are how many different kinds of amino
acids in proteins? a. 3 b. 6 c. 12 d. 20 e. 28
Which of these is mismatched?
a. oligodendrocytes; make myelin for brain axons b. Schwann cells; make myelin for peripheral axons c. astrocytes; most abundant cells in the brain d. microglia; engulf dead or dying brain tissue e. none of these are mismatched
Some very showy desert flowers avoid desiccation of delicate floral tissues by blooming at night. They are pollinated by
A) bees. B) hummingbirds. C) wind. D) bats.