Which of the following statements is NOT important to Darwin's theory of natural selection?
a) all species have the ability to produce more offspring than can live and reproduce
b) variation is found in all natural populations
c) offspring tend to inherit characteristics acquired by their parents during their lifetimes
d) some variation found in natural populations is heritable
e) none of the above choices is correct; all are important to his theory
Ans: c) offspring tend to inherit characteristics acquired by their parents during their lifetimes
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Part of the ability of S. mutans to produce dental caries depends on its ability to
A. invade plaque and dissolve the gums. B. convert sucrose to lactic acid. C. convert proteins to sugars. D. attach to the gums.
Morphine mimics natural pain killers called _____
Fill in the blank(s) with correct word
Which of the following statements is
INCORRECT?
a. There are differences in the quality of energy. b. Once energy is utilized, it is not seen in any other form. c. Whenever energy conversion occurs, some energy is lost. d. One form of energy can be converted to other forms of energy. e. The universe has a definite amount of energy.
Which structure(s) represent a first line of defense against pathogens?
A) skin B) inflammation C) lymphocytes D) phagocytosis by macrophages