In human blood groups, the fact that an individual can have an AB blood type is an example of ___________
A. incomplete dominance
B. incomplete penetrance
C. sex-influenced trait
D. temperature-sensitive conditional allele
E. codominance
E
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Which type of mutation results in sickle cell anemia?
a. base-pair substitution b. insertion c. deletion d. frame-shift e. gene duplication
An extant organism is found to be almost
unchanged from its 200 million year old fossil. This is an example of: a. stasis. b. coevolution. c. mass extinction. d. adaptive radiation. e. none of these
During the light-dependent reactions, NADPH ____.
A. is an enzyme B. is the oxidized form of NADP+ C. accepts hydrogen and electrons from water D. accepts hydrogen and electrons from carbohydrates E. obtains energy from ATP
Which substance is removed from the blood during tubular secretion?
A. aldosterone B. Na+ C. water D. H+ E. Cl-