Balanced polymorphism in a population is likely the result of
a. disruptive selection.
b. sexual selection.
c. directional selection.
d. reproductive isolation.
e. stabilizing selection.
A
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The cortical reaction causes
A. the zona pellucida or vitelline layer to harden. B. the embryo to embed into the uterus. C. egg membrane depolarization. D. the sperm to bind to the egg membrane. E. fast block polyspermy.
Which of the following is NOT considered
strengthening or supportive tissue? a. collenchyma b. xylem c. sclerenchyma d. parenchyma e. cork
Proteins are largely responsible for the traits of living organisms, while ________ provides the blueprint for the organization, development, and function of living things.
A. DNA B. protein C. carbohydrate D. lipid E. metabolite
Sequencing of HIV-1 revealed that it is most closely
related to which of the following? a. simian immunodeficiency virus b. feline leukemia c. bovine immunodeficiency virus d. hepatitis B e. all of these