Genetic recombination ____
a. occurs in eukaryotes but not prokaryotes
b. involves exchange between non-homologous regions of DNA
c. results from asexual reproduction
d. decreases genetic diversity
e. can occur in the absence of meiosis
ANSWER: e
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The rate of contaminant microbial growth during the exponential phase in food depends on
A) temperature. B) the nutrient value of the food. C) water content. D) temperature, nutrient value, and water content.
A particular flower can be purple, blue, red, or white. A pure-breeding purple plant is crossed with a pure-breeding white plant and the F1 are then crossed to produce an F2 generation. Which phenotypic ratio in the F2 may indicate that flower color in these plants is controlled by two genes that interact additively?
A) 3:1 B) 1:2:1 C) 9:3:3:1 D) 9:3:4 E) 15:1
The study of genetic variations that affect people’s responses to environmental chemicals is called
_____________. Fill in the blank(s) with the appropriate word(s).
The concentration of protein in the blood is higher in post-glomerular blood than in arterial blood because
A. water concentration increases and protein concentrations decrease. B. protein is digested and then concentrated in glomerular (Bowman's) capsule. C. reabsorption of protein occurs. D. water passes into the capsule, but protein molecules are too large to move into the capsule and are concentrated in the blood. E. the kidney manufactures and then stores protein in the glomerulus.