The oxidation of which macromolecule yields the most energy by weight?
a. lipids
b. glycogen
c. starch
d. glucose
e. protein
ANSWER: a
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Which of the following is an example of herd immunity?
A) Brucellosis is no longer found in farm animals in the United States. B) If 70% of the population is immunized against polio, the disease will be essentially absent from the population. C) Federal law requires that all cattle not immune to anthrax be destroyed. D) All farm animals used for food must be immunized against all the common agents of disease that infect humans.
Allergies run in families because
A. immunoglobulins pass from mother to fetus. B. immunoglobulins pass through breast milk. C. the relative production of IgE is inherited. D. the variable region of antibodies is genetically determined.
Genetic recombination is the result of
A. fertilization. B. meiosis. C. sexual reproduction. D. All of these answers are true.
An arthropod embryo has ________ germ layer(s)
A) no B) one C) two D) three E) four