The process by which plants produce seeds begins with fertilization
a. True
b. False
ANSWER: False
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The classification of a surgical wound as dirty refers to a:
a. lack of cleanliness of the surgical instru-ments. b. surgical wound in an emergency setting in which the cleansing protocol was not fol-lowed. c. surgical wound that has become grossly infected. d. large number of contaminating organisms at the wound site.
The movement of materials already in the phloem can be described using the term(s):
a. source-to-sink only b. pressure flow only c. cohesion only d. both active transport and cohesion e. both source-to-sink and pressure flow
Does altering the permeability characteristics of the membrane change the direction of solute movement?
a. Yes b. No
In the laboratory, fruit flies (Drosophila) were artificially selected for the number of bristles on their bodies. One population (R) was selected for low numbers of bristles, a second population (S) for high numbers of bristles.
After 35 generations (about 1 year's time), the two populations R and S were studied. Researchers found
A. a huge increase in S, a huge decrease in R, with no overlap whatsoever. B. no change was seen; it's much too soon. C. a vast, overlapping range of bristle numbers was seen. D. a slight increase in bristles in S, a slight decrease in R, with a little overlap in the middle ranges. E. some slight increase of bristle numbers was already evident.