You find a protist that has a single flagellum surrounded by a collar of microvilli. You correctly
conclude that this organism is
a. a cellular slime mold.
b. a plasmodial slime mold.
c. a choanoflagellate.
d. not an opisthokont.
e. not motile.
C
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Which of the following statements about the mouse is FALSE?
a. Its scientific name is Mus musculus. b. Females give birth to offspring about three weeks after mating. c. It has been used to disprove the "inheritance of acquired characters" hypothesis. d. Knockout mice are those that carry a lethal allele. e. Knockout mice are those that have a gene that is completely nonfunctional.
Blue poppies native to China are grown at a plant-breeding center in California. Those with the thickest leaves survive and reproduce best in California's drier climate. This evolutionary adaptation of the poppies to their new environment is due to __________.
A. genetic drift B. stabilizing selection C. directional selection D. neutral variation
Enzymes
a. are usually carbohydrates. b. can only catalyze a reaction once. c. reduce the activation energy of chemical reactions. d. eliminate the activation energy of chemical reactions.
Which of the following is NOT a factor in determining the potential of a new antimicrobial?
A. cost of production B. duplication of existing antimicrobial mechanism of action C. spectrum of action D. route of administration E. stability