Which hemoglobin genotype has the highest fitness in an area of low malaria infection?

a. HbAA
b. HbAS
c. HbSS
d. All are equal


Answer: a. HbAA

Biology & Microbiology

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The inorganic non-protein components that participate in enzyme catalysis are known as

A. coenzymes. B. cofactors. C. products. D. substrates. E. reactants.

Biology & Microbiology

The primary determinant of blood flow to a particular region of the body during normal physiological function is

A. the radius of arterioles. B. blood hematocrit. C. the length of arterioles. D. venous return regulated by sympathetic activation. E. leakage of fluids from the capillaries.

Biology & Microbiology

In the 1700s, ____ classified organisms by their morphological similarities and differences, and in the 1800s, ____

provided the scientific rationale for the heritable basis of these morphological variations.

a. Mendel; Linnaeus b. Darwin; Linnaeus c. Linnaeus; Darwin d. Linnaeus; Mendel e. Mendel; Darwin

Biology & Microbiology

The ____ in humans is active in both the digestion of food and the absorption of nutrients

a. mouth b. liver c. pancreas d. small intestine e. stomach

Biology & Microbiology