Supralittoral isopods
a. must have some salt water cover daily.
b. would drown if placed in water.
c. return to the sea to lay eggs.
d. have pseudogills.
e. prey on barnacles.
B
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In a particular layer of rock, a number fossilized ferns are found, but no fossilized mosses are found. What conclusions can be drawn from this finding?
A. The soft tissues of mosses may not have fossilized as readily as the lignified tissues of ferns, so it is difficult to draw any conclusions from this limited sample. B. Mosses and ferns did not coexist in the same environment. C. There are fewer species of moss than ferns. D. Ferns evolved earlier than mosses, so it is not surprising to find a layer with only ferns and no mosses. E. Ferns decompose more rapidly than mosses and thus are more likely to fossilize.
The helix-turn-helix motif found in many regulatory proteins fits into the side of a DNA molecule. If a
newly discovered enzyme has a helix-turn-helix motif, you would predict that
a. this enzyme has multiple peptide chain subunits. b. this enzyme is probably able to bind to RNA, too. c. this enzyme probably binds to DNA. d. this enzyme has an allosteric regulator. e. this enzyme is a polymerase that helps synthesize new DNA sequences.
Triglycerides are composed of ________ and ________
a. three fatty acids / one glycerol b. four fused hydrocarbon rings / hydroxyl groups c. three glycerols / one fatty acid d. a hydrophilic head / two hydrophobic tails
The female reproductive whorl of a flower typically consists of one or more
a. petals. b. carpels. c. stamens. d. receptacles. e. sepals.