Period when clonal selection is taking place, so no antibodies to the antigen encountered are currently produced
A. Primary Response
B. IgM
C. Secondary Response
D. IgG
E. Latent Period
F. 1st Exposure
G. 2nd Exposure
E. Latent Period
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Which of the following statements is NOT true of Trichomonas vaginalis?
A. It attacks the human genitourinary tract. B. It lacks true mitochondria. C. It has hydrogenosomes. D. It has mitosomes. E. It has a flagellum.
If electrons are gained or lost in the formation of a bond, the bond is termed
A. covalent. B. hydrogen. C. ionic. D. nonpolar.
What is the best definition for the FISH technique?
A) A method to fluorescently label different genes on metaphase chromosomes. B) A method to fluorescently label methylated histones associated with chromosomes. C) A method to fluorescently label heterochromatin. D) A method to fluorescently label euchromatin.
Why is there a wide variation in skin color in humans?
A. Crossing-over increases the rate of color variation. B. Skin color is a polygenic trait. C. Environmental changes like improvements in diet change the color of the skin over time. D. Artificial selection causes variation in skin color. E. Genetic drift selects for genes that blend skin colors.