All of the following events occur between weeks 17 and 20, EXCEPT
A. Eyebrows and hair develop.
B. Fetal movements may be perceived by the mother.
C. Lanugo develops, providing structural support to the vernix caseosa.
D. Substantial amounts of white fat develop.
E. Vernix caseosa develops, protecting the fetal skin from the amniotic fluid.
Answer: D. Substantial amounts of white fat develop.
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When entering a newly generated DNA sequence into the Basic Local Alignment Search Tool (BLAST), a researcher can:
A. identify orthologs. B. assign tentative function to a protein. C. identify restriction enzyme sites. D. identify orthologs and assign tentative function to a protein. E. identify orthologs and identify restriction enzyme sites.
Gene expression leads to the production of which of the following?
a. RNA and protein b. DNA and RNA c. polypeptides and amino acids d. protein and polypeptides
Gene flow can establish new alleles in a population
a. true b. false
The study of the world-wide distribution of plants and animals is ____
a. fossilization b. fossilization dating c. biogeography d. plate tectonics e. radiometric dating