Albinism is due to the inability to make ________
A) tyrosine
B) melanin
C) hair
D) collagen
B
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True or false: The valence electrons of an atom are at the lowest energy level because their increased distance from the nucleus reduces their attraction to the atom's protons
A. true B. false
A formal 2-part name, or binomial, combines the names of
a. a family plus a genus. b. a class plus a specific epithet. c. a genus plus a specific epithet. d. a family plus a class. e. a family plus a specific epithet.
Programmed cell death is known as
A. meiosis. B. autophagy. C. cell genesis. D. apoptosis. E. mitosis.
Why must the life cycle of sexually reproducing species alternate between haploid and diploid stages?
A. Haploid cells cannot grow independently of diploid cells. B. Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. C. Meiosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. D. Mitosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. E. The diploid stage allows for genetic recombination.