Of all organisms, prokaryotes are the ____
a. smallest
b. least abundant
c. least metabolically diverse
d. least widespread
e. least evolved
ANSWER: a
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The proplastids associated with giving flowers and fruits their distinctive colors are the
A) chloroplasts. B) elaioplasts. C) amyloplasts. D) chromoplasts. E) plastids.
Assume you have isolated an unknown virus. This virus has a single, positive sense strand of RNA, and possesses an envelope. To which group does it most likely belong?
A) herpesvirus B) picornavirus C) retrovirus D) togavirus E) papovavirus
The correct sequence of reagents in the Gram stain technique is
a. iodine, alcohol, safranin, crystal violet. b. safranin, crystal violet, alcohol, iodine. c. crystal violet, iodine, alcohol, safranin. d. crystal violet, alcohol, iodine, safranin. e. alcohol, iodine, crystal violet, safranin.
Competitive release is most likely to occur when a
A) species colonizes an island that already has potential competitors. B) species moves into new habitats that it never occupied on a mainland. C) species decreases in abundance. D) competing species is added to a community.