A low number of methyl groups is associatedwith:a

cancer.
b. famine.
c. chemicals in cigarette smoke.
d. cancer and famine.
e. all of these.


D

Biology & Microbiology

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PCR produces

A. DNA fragments of all possible sizes. B. DNA fragments that are one nucleotide larger than the next fragment. C. DNA fragments of a particular size. D. DNA fragments of increasing size. E. DNA fragments that are one nucleotide larger than the next fragment AND DNA fragments of increasing size.

Biology & Microbiology

A small population of Dutch settled in South

Africa in the 17th century and became known as Afrikaners. By chance, a few Dutch settlers carried the gene for Huntington’s disease. Today Huntington’s disease occurs at a relatively high frequency in this population. This is an example of

a. the bottleneck effect. b. the founder effect. c. gene flow. d. the Red Queen effect. e. natural selection.

Biology & Microbiology

Increases output of pancreatic juice and bile

What will be an ideal response?

Biology & Microbiology

Which is the only antibody that can cross the pla¬centa to protect a fetus before its own immune system becomes active?

A. IgA B. IgE C. IgM D. I gG E. IgD

Biology & Microbiology