While touring the ancient Egypt exhibit at the local history museum, you learn that ancient Egyptians would slash figs in order to stimulate ripening. Based on your knowledge of plant hormones you hypothesize that wounding the figs must release:
A. abscisic acid.
B. gibberellin.
C. indoleacetic acid.
D. ethylene.
E. cytokinin.
D. ethylene.
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When does DNA replication take place regarding meiosis? DNA replication _____
A) does not take place in cells destined to undergo meiosis B) occurs before meiosis I begins C) occurs between meiosis I and meiosis II D) occurs during prophase I
Which of the following is NOT a piece of genetic evidence that supports the "out of Africa" hypothesis for the origin of humans
A. mtDNA seqeunces from African and Non- African samples indicates a divergence time of approximately 200,000 years. B. Genetic diversity of mtDNA sequences among African samples is greater than genetic diversity of mtDNA sequences among Non-African samples. C. mtDNA alleles present in Europe are a sub -set of mtDNA alleles derived from those present in Africa. D. mtDNA alleles among samples from Africa are more similar than mtDNA alleles among samples from Europe
In your Drosophila laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.
A. pair-rule B. gap C. maternal effect D. segment-polarity E. gap or segment-polarity
Which of the following is not true of enterotoxigenic E. coli (ETEC)?
A. It can be life-threatening in infants. B. Fluid replacement is vital to surviving an infection. C. It causes traveler's diarrhea. D. It causes a high fever.