Which of these pairings is not correct?
a. diapsids?lizards
b. diapsids?turtles
c. synapsids?dinosaurs
d. synapsids?mammals
e. synapsid-birds
E
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Optical density and viable cell concentration are LEAST proportional to each other during
A) lag phase. B) exponential growth phase. C) stationary phase. D) death phase.
The primary function of the loop of Henle is:
A. to generate a concentration gradient between the inner medulla and outer cortex. B. to dilute the filtrate passing through the loop. C. to concentrate the filtrate passing through the loop. D. selective reabsorption of glucose and other solutes into the bloodstream. E. active secretion of other wastes from the bloodstream.
The donor cell makes ___________ whose function is to bring F- cells close enough to transfer a ___________ to the recipient.
A. a sex pilus, single strand of DNA B. a sex pilus, double strand of DNA C. an F factor, fertility plasmid D. an F factor, replicated F factor E. a sex pilus, bacterial chromosome
The type of floral attraction that would work on the pollinator in Figure 37-2 is:
a. white flowers. b. purple or blue flowers. c. a strong sweet scent. d. a strong carrion-like scent. e. sweet nectar.