Polyphagous parasites feed on

A. any plant species.
B. many different host species.
C. ectoparasites.
D. parasitoids.
E. a single host species.


Answer: B

Biology & Microbiology

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In humans, typically only infants produce the enzyme lactase to break down lactose. Some adults have changes in that allow transcription factors to bind and turn on expression of the lactase gene into adulthood.

A. codons B. mRNA C. exons D. RNA polymerase E. enhancers

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What are the four major classes of chromosomal rearrangements?

A) inversions, duplications, translocations, deletions B) duplications, reciprocal translocations, nonreciprocal translocations, inversions C) deletions, inversions, duplications, point mutations D) translocations, pericentric inversions, paracentric inversions, deletions

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Explain the basic mechanism CRISPR in DNA manipulation

What will be an ideal response?

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The one-gene:one-enzyme hypothesis emerged from work on which two organisms?

A) Neurospora and Drosophila B) E. coli and humans C) E. coli and yeast D) Drosophila and humans E) All of the answers listed are correct.

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