During Drosophila development, there is a regulatory cascade of gene activation. The proper sequence for this cascade is _____
A) bicoid, gap genes, pair-rule genes, and segment polarity genes
B) bicoid, pair-rule genes, gap genes, and segment polarity genes
C) bicoid, segment-polarity genes, gap genes, and pair-rule genes
D) bicoid, gap genes, segment polarity genes, and pair-rule genes
Answer: A
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____ is the proportion of individuals of an initial cohort that survives to each successive age or stage of the lifecycle
Fill in the blank with the appropriate word.
What happens when the cAMP-CAP complex binds the CAP site near the lac promoter?
A. Transcription rate decreases. B. Transcription rate increases. C. RNA polymerase binds to the promoter. D. RNA polymerase binds to the promoter and transcription rate decreases. E. RNA polymerase binds to the promoter and transcription rate increases.
In the geologic timescale, the sequence of eons and eras beginning with the earliest era and proceeding forward to the most recent era is
A. Cenozoic - Archean - Mesozoic - Paleozoic - Proterozoic. B. Mesozoic - Cenozoic - Paleozoic - Proterozoic - Archean. C. Paleozoic - Proterozoic - Archean - Mesozoic - Cenozoic. D. Archean - Paleozoic - Proterozoic - Cenozoic - Mesozoic. E. Archean - Proterozoic - Paleozoic - Mesozoic - Cenozoic.
In the "Ultimatum Game," one player (the proposer) proposes a way to split $100 and the other player (the decider) either accepts it—in which case both players get the amount proposed for them—or rejects it and neither player gets any of the cash. Deciders will nearly always reject offers of $90 for the proposer and $10 for them because:
a) ten dollars is closer to zero than ninety dollars, so the decider is really not losing much. b) the evolution of reciprocal altruism has led to human brains being very sensitive to detecting and punishing stingy/selfish people. c) money did not exist for most of human evolutionary history. d) $10 has little value for anyone. e) None of the above is correct—deciders always accept offers of cash.