Archaea differ from bacteria because archaea

a. lack peptidoglycan
b. lack nuclei
c. reproduce by binary fission
d. use organic compounds for food


Answer: a. lack peptidoglycan

Biology & Microbiology

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Thermus aquaticus was important in the

development of PCR in that it provided the necessary a. DNA polymerase. b reverse transcriptase. c. primers. d. DNA template. e. DNA ligase.

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Assuming no crossing over between the gene in question and the centromere, when do alleles segregate during meiosis?

What will be an ideal response?

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In fruit flies normal wings are dominant over vestigial wings. If a homozygous normal-winged fly and vestigial-winged fly were crossed, what would the phenotype of the fly offspring be? 

A. all vestigial-winged B. all normal-winged C. three normal: one vestigial-winged D. one normal-winged: two half-winged: one vestigial-winged

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One simple thing that you can do to help safeguard the environment is to eat a diet consisting only of

A) producers. B) primary consumers. C) secondary consumers. D) a mix of producers and consumers.

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