1 Which phrases best identify characteristics of asexual reproduction?

(1) one parent, union of gametes, offspring similar to but not genetically identical to the parent
(2) one parent, no union of gametes, offspring genetically identical to parents
(3) two parents, union of gametes, offspring similar to but not genetically identical to parents
(4) two parents, no union of gametes, offspring genetically identical to parents

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2 To determine the identity of their biological parents, adopted children sometimes request DNA tests. These tests involve comparing DNA samples from the child to DNA samples taken from the likely parents. Possible relationships may be determined from these tests because the

(1) base sequence of the father determines the base sequence of the offspring
(2) DNA of parents and their offspring is more similar than the DNA of non-family members
(3) position of the genes on each chromosome is unique to each family
(4) mutation rate is the same in closely related individuals

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3 Although all the body cells in an animal contain the same hereditary information, they do not all look and function the same way. The cause of this difference is that during differentiation

(1) embryonic cells use different portions of their genetic information
(2) the number of genes increases as embryonic cells move to new locations
(3) embryonic cells delete portions of chromosomes
(4) genes in embryonic body cells mutate rapidly

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4 According to the theory of natural selection, why are some individuals more likely than others to survive and reproduce?

(1) Some individuals pass on to their offspring new characteristics they have acquired during their lifetimes.
(2) Some individuals are better adapted to exist in their environment than others are.
(3) Some individuals do not pass on to their offspring new characteristics they have acquired during their lifetimes.
(4) Some individuals tend to produce fewer offspring than others in the same environment.

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5 The energy an organism requires to transport materials and eliminate wastes is obtained directly from

(1) DNA           (3) hormones
(2) starch        (4) ATP

 

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