The human immunodeficiency virus may infect
a. sperm cells.
b. white blood cells.
c. purple blood cells.
d. red blood cells.
e. egg cells.
Ans: b. white blood cells.
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Two species of spiny anteaters (echidnas) and the duck-billed platypus are the only known living members of the ____ mammalian lineage.
a. Strepsirhini b. monotremes c. Rodentia d. Haplorhini e. marsupials
The ____ of the plant refers to the mechanisms by which the plant body functions in its environment
a. morphology b. ecology c. anatomy d. distribution e. physiology
The process of producing proteins from DNA involves two different steps. What is the term used to describe each step, and what happens during each of these steps?
What will be an ideal response?
Mutations are a source of genetic ________ by which evolutionary change is possible
A) reproduction B) constancy C) stability D) variability