The oldest proposed cell microfossils are from ____ year-old rocks
a. 3.5 billion
b. 1.25 billion
c. 1.8 billion
d. 1.5 billion
e. 500 million
ANSWER: a
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An individual heterozygous for sickle-cell disease produces both normal and abnormal polypeptides. This is an
example of ____.
a. epistasisb. incomplete dominance c. polygenic inheritance d. multiple alleles e. pleiotropy
At the end of a run of gel electrophoresis, where will you find the smallest fragments of DNA?
a. near the negative electrode side of the gel b. in the middle of the gel c. near the positive electrode side of the gel d. in the origin wells
European cuckoo birds lay their eggs in the nest of other bird species, allowing the other birds to raise their young. The cuckoo birds are therefore:
a. foster parents b. commensals c. endosymbionts d. brood parasites e. ectoparasites
All fungi are:
A) autotrophic. B) heterotrophic. C) multicellular. D) unicellular.