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
ANSWER: c
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You are an experienced naturalist and biologist and you observe two birds mating that you do not believe to belong to the same species
The eggs from this breeding do not hatch, and when you obtain one of the eggs, you find embryonic development stopped not long after fertilization. Which of the following conclusions is supported by these observations? A. Pre-zygotic isolation prevented successful reproduction. B. Post-zygotic factors prevented successful reproduction. C. Behavioral isolation prevented successful reproduction. D. Temporal isolation prevented successful reproduction. E. This is evidence to suggest the two types of birds are a single species.
In humans during meiosis, a diploid germ cell reduces its chromosome number by half to generate haploid cells.
A. 46 B. 4 C. 2 D. 3 E. 23
Oligosaccharides include ____
a. sucrose only b. glucose only c. fructose only d. lactose only e. both sucrose and lactose
Assume that short hair (L) is dominant to long hair
(l) and black hair (B) is dominant to brown (b). If you find a black, short-haired animal, you can determine its genotype by crossing it to an animal with a genotype of a. LL BB. b. ll BB. c. ll Bb. d. ll bb. e. LL bb.