One part of Darwin's theory is that individuals with certain traits have an increased competitive edge. The source of
these traits in individuals is due to ____.
a. adaptation to the stress
b. development over a lifetime
c. inheritance from birth
d. mutation after birth
e. allele changes after birth
ANSWER: c
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Primers are used in both PCR and in DNA sequencing. What is the purpose of the primers?
A. to separate the DNA template strands. B. to provide a 3'- OH for DNA polymerase to build a new DNA strand. C. to terminate synthesis of the growing DNA strand. D. to separate various-sized DNA products. E. to add nucleotides to a growing DNA strand.
Eutrophication occurs when
a. species diversity increases. b. coliform bacteria counts go up. c. nutrient levels decline. d. nutrient levels increase. e. sea surface temperature decreases.
Four of the five choices listed below are steps in the
process of transcription. Select the exception. a. cap put on one end b. introns snipped out c. action by DNA polymerase d. poly-A tail placed on one end e. exons spliced together
Which of the following is NOT true of the organism
depicted in the figure below? a. It represents a symbiotic relationship. b. It contains two symbionts. c. It is found in association with tree roots. d. It can live in harsh climates. e. It can break down the bedrock it colonizes.