Which type of mutation results in sickle cell anemia?
a. base-pair substitution
b. insertion
c. deletion
d. frame-shift
e. gene duplication
ANSWER: a
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How is the process of carbon fixation used for a plant's growth?
a. It extracts carbons from plant sugars to be used for energy. b. It fixes carbon from a PGAL molecule into a sugar. c. It extracts carbon from an inorganic source (CO2) and uses it to build sugars which plants use for energy. d. It extracts carbon from an inorganic source (CO2) to produce O2 needed for plant growth. e. It fixes carbon which is then used in the light dependent reactions to produce ATP energy.
An action potential is a brief reversal of the __________ potential. Fill in the blank(s) with the appropriate word(s)
Sister chromatids are joined by a common centromere and each carries identical ____________________. Fill in the blank(s) with the appropriate word(s)
Trophic-level transfer efficiency averages about
A. 1%. B. 25%. C. 33%. D. 10%. E. 0.1%.