The monomers of DNA, called ________, are composed of ________
a. amino acids / carbon, hydrogen, oxygen, and nitrogen
b. monosaccharides / carbon, hydrogen, and oxygen
c. nucleosides / base and sugar
d. nucleotides / base, sugar, and phosphate
d
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Male northern elephant seals (Mirounga angustirostris) are common in the northern Pacific. Which of the following features of a male elephant seal likely reflect sexual selection?
A. They have two eyes. B. Their forelimbs are flippers. C. Females have a uterus; males have a penis. D. They have a thick layer of blubber (fat) under the skin. E. Males are much larger than females.
Portion of Figure 21.11
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Refer to the accompanying figure for questions 26-28.
The kelp shown in the accompanying figure represents the ____ stage in its life cycle.
A. spore-bearing B. gamete-forming C. haploid D. motile E. feeding
If you were using cladistics to construct a phylogeny of canines, which of the following would be the most useful outgroup?
a. Leopard b. Domestic dog c. Coyote d. Wolf e. Crocodile
Which of the following is normal oral and nasopharyngeal flora but is involved in infective endocarditis in adults who have underlying congenital or rheumatic heart disease?
A. Haemophilus influenzae B. Haemophilus aphrophilus C. Haemophilus aegyptius D. Haemophilus ducreyi E. All of the choices are correct