The use of birth control pills (oral contraceptives) _____

A) reduces the incidence of ovulation
B) prevents fertilization by keeping the sperm and egg physically separated by a mechanical barrier
C) prevents implantation of an embryo
D) prevents sperm from exiting the male urethra
E) prevents oocytes from entering the uterus


Answer: A

Biology & Microbiology

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Chemical bonds that are formed when one atom with a partial positive charge (created from unequal

sharing of electrons) is electrically attracted to another atom with a partial negative charge (also created from unequal sharing of electrons) are called ____.

a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds

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Avocado sunblotch is caused by a

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Which of the following processes describes the formation of a complementary RNA molecule?

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