The primers in PCR are ____.
A. fragments of mRNA
B. designed to base pair with mRNA
C. free nucleotides
D. radioactive
E. needed to initiate the reaction
Answer: E
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Decreases in the prey growth rate are followed by
a. Increases in the predator growth rate. b. Decreases in the predator growth rate. c. No change in the predator growth rate. d. The predator growth rate is not affected by the prey growth rate.
When molecules are broken apart in respiration, ____
a. the heat produced is used to drive biological reactions b. the oxygen in the compounds that are broken apart is used as an energy source c. the energy released is channeled into molecules of ATP d. ATP is converted into ADP e. ADP is released as a waste product
A polyploid organism contains ____ set(s) of chromosomes.
A. no B. one C. two D. multiple
The response to touch by such plants as the sensitive plant is due to
A. effect of gibberellins on the area affected. B. auxin displacement in the touched area. C. changes in water content of cells. D. sensitive responder cells.