In a hypothetical study, equal numbers of marked dark and light moths are released in polluted and unpolluted woodlands and recaptured 10 days later. According to the industrial melanism hypothesis, which of the following results is unexpected?
A. Fewer marked dark moths should be recaptured in unpolluted woodlands than in polluted woodlands.
B. More marked dark moths should be recaptured in polluted woodlands than in unpolluted woodlands.
C. Fewer marked light moths should be recaptured in polluted woodlands than in unpolluted woodlands.
D. Fewer unmarked dark moths should be captured in polluted woodlands than unmarked light moths.
E. More marked light moths should be recaptured in unpolluted woodlands than in polluted woodlands.
Answer: D
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The expression "knee-jerk reaction" refers to someone doing something automatically without thinking. What does this expression mean in biological terms?
A) In the nervous system, this expression implies the involvement of higher brain regions before executing a spinal reflex. B) In the nervous system, this expression implies the lack of brain input when executing a spinal reflex. C) This expression implies that the knee-jerk reaction will be shortened in duration following input from higher brain regions. D) This expression implies that only children exhibit this type of unthinking behavior.
A(n) ________ is a nonprotein substance that aids in forming the enzyme-substrate complex in metabolic reactions
Fill in the blank(s) with correct word
In its youth, a pet parrot was owned by someone who kept the wings clipped and never allowed it to fly. Later in life, the new owner let the feathers grow and let the parrot fly around the house. But the parrot kept knocking over lamps and crashing into walls. "Wow," said the owner, "I guess parrots are just too clumsy to fly around a house without destroying everything." What is an alternative explanation?
A. Since the parrot was not able to practice flying during the critical period for flight development, the brain circuits for accurate flying were not able to develop. B. The critical period for flying development in the brain has just now begun with the bird's first attempt. In a few weeks the critical period will end, so it must practice during this time. C. The parrot just needs more practice flying -- although it did not get to fly when young, this should not affect later ability. D. In nature, parrots have much more room to fly, and do not have to navigate around delicate home decor.
______ mitotic cells do not divide readily but can be stimulated to divide when needed.
Fill in the blank(s) with the appropriate word(s).