The most abundant phagocytes in our immune
system arsenal are the
a. macrophages.
b. neutrophils.
c. monocytes.
d. dendritic cells.
e. T lymphocytes
B
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Relative to enzymes in mesophilic microorganisms, which of the following is NOT characteristic of enzymes in psychrophiles?
A) decreased alpha helices B) decreased beta sheets C) less hydrogen bonds D) less ionic bonds
The methanobacteria, halobacteria, and sulfobacteria are included in which domain?
A) eubacteria B) protista C) blue-green algae D) archaea E) all of the above
Homozygotes for hemoglobin C have
A) sickle cell disease. B) a normal phenotype. C) a bluish complexion. D) a black mouth.
The ____________________ theory describes how interactions between actin and myosin produce skeletal muscle
contractions. Fill in the blank(s) with the appropriate word(s).