Regardless of the source of energy, virtually all living organisms convert their energy into ________ before using it
a. light and heat
b. carbon dioxide
c. glucose
d. ATP
d
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The gene for human ABO blood type, for which three or more alleles persist in a population at a relatively high frequency, is an example of _______.
A. multiple allele system B. polygenic inheritance C. incomplete dominance D. epistasis E. continuous variation
The first example of an antimicrobial drug synthesized in the laboratory was
A. penicillin. B. sulfa. C. erythromycin. D. Salvarsan.
Why are conditional knockout animals desirable?
A) Genes that are essential for development can be deleted in the adult or only in specific tissues. B) Animal cell lines with deletions can be created. C) They are easier to create than standard knockout animals. D) The mutations they create are more stable than those created by standard knockout techniques.
Birds typically have a large sternum with a bladelike vertical protrusion to which flight muscles attach called:
A. Radius
B. Ulna
C. Breastbone
D. Keel
E. Humerus