The smallpox vaccine uses the ________ virus.
A. smallpox
B. variola
C. human herpesvirus 6
D. vaccinia
E. herpes simplex
Answer: D
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Pluripotent cells are taken from the ____________ of a blastocyst. Fill in the blank(s) with the appropriate word(s)
Gene flow is
A. used for comparison purposes when numbers of organisms or size of organisms would lead to confusion. B. the optimum number of individuals of a species that can survive. C. movement of genes within a population from place to place resulting from migration. D. graphic expression of increasing or decreasing numbers.
As am embryo develops, different sets of genes are regulated by
a. promoters and operators b. mRNA and lac repressors c. operons and operators d. transcription factors and repressors
Archaeal and bacterial pili are identical in structure and function.
Answer the following statement true (T) or false (F)