The first vertebrates to invade land were

A. arthropods.
B. reptiles.
C. amphibians.
D. birds.


Answer: C

Biology & Microbiology

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Does Andrew have a reason to be concerned about developing Huntington's Disease?

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Which of the following statements about genomic libraries and cDNA libraries is TRUE?

A. A genomic library is made using reverse transcriptase. B. A cDNA library is derived from mRNA and is made using reverse transcriptase. C. A genomic library is derived from mRNA. D. A cDNA library is derived from chromosomal DNA. E. A genomic library is derived from mRNA and is made using reverse transcriptase.

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