Body cells of human males contain
a. one X chromosome and one Y
chromosome.
b. two X chromosomes.
c. two Y chromosomes.
d. two O chromosomes.
e. chromosomes X, Y, and O.
A
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Your family is taking a long driving vacation across the midwestern and western United States. As you travel, you notice that the flowers, birds, and trees of the Midwest and the Rocky Mountains are very different. As you ponder why, you remember that such differences in the distribution of species are part of the field of ______.
a. biogeography b. geology c. morphology d. paleontology
Which fungal phylum includes some species that use a trapping behaviour by which small worms are ensnared and then digested?
a. Basidiomycota b. Glomeromycota c. Ascomycota d. Zygomycota
Assume that short hair (L) is dominant to long hair
(l) and black hair (B) is dominant to brown (b). If you find a black, short-haired animal, you can determine its genotype by crossing it to an animal with a genotype of a. LL BB. b. ll BB. c. ll Bb. d. ll bb. e. LL bb.
A linear stretch of DNA that specifies the sequence
of amino acids in a polypeptide is called a(n) a. codon. b. intron. c. messenger. d. gene. e. enzyme.