A —CH3 group is a(n) __________ group
a. carboxyl
b. hydroxyl
c. amino
d. methyl
e. carbonyl
Answer: d
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Which of the following explains why leaf primordia develop in spiral or whorled patterns around the stem tip?
A. accumulation of auxin in the stem tip B. depletion of auxin near leaf primordia C. accumulation of auxin in leaf primordia D. loosening of cell walls E. None of these choices is correct
A tapeworm living in a person's intestine is
A. a vector. B. an internal parasite. C. a mutualistic organism. D. a predator.
A diminishing response by receptors to a constant stimulus is known as ____.
A. an action potential B. neural transduction C. sensory adaptation D. referred pain E. a sensation
In Hodags (mythical creatures of Wisconsin), brown fur (B) is dominant over gray fur (b) and long horns (H) are dominant over short horns (h). Two true-breeding hodags, one with brown fur and long horns and the other with gray fur and short horns mate and produce an F1. Two F1 individuals are mated. What proportion of the offspring will exhibit a phenotypic combination that is different from the P generation? Assume the genes for fur color and horn length are on different chromosomes.
A. 9/16 B. 3/16 C. 6/16 D. 1/2 E. 1/16