Currently, the most effective method of birth control is:
a. spermicide.
b. an IUD.
c. injectable contraceptives.
d. oral contraceptives.
e. a condom.
D
Biology & Microbiology
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Because ____ is less likely to occur between distant populations of the same species, their gene pools and phenotypes
are often somewhat different.
a. genetic drift b. a population bottleneck c. a founder effect d. gene flow e. asexual reproduction
Biology & Microbiology
Bacterial strains that have distinct antigenic properties are called ________.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Which of the following is not a component of plasma?
a. erythrocytes b. waste products c. dissolved gases d. salts e. proteins
Biology & Microbiology
Foreign substances that elicit an immune response are called:
A. Antibodies B. Interleukins C. Cytokines D. Antigens
Biology & Microbiology