Which of the following is not a characteristic
of viruses?
a. Contains DNA or RNA genetic material.
b. Contains cytoplasm and ribosomes.
c. Has a protein coat.
d. Can only replicate inside a living host cell.
e. Is very small
B
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In the following pedigree, the indicated trait is caused by what type of allele?
A) autosomal recessive
B) autosomal dominant
C) X-linked recessive
D) X-linked dominant
E) Y-linked
The movement of water through a plant is
driven by
a. the drying power of the air. b. osmosis. c. active pumping using ATP. d. root pressure. e. a combination of more than one of these
Refer to Figure 16-2. Based on the phenotypes of the third generation, the genotype of the father in the second generation must be:
a. homozygous for albinism.
b. heterozygous for hair color.
c. heterozygous for albinism.
d. X-linked.
e. dominant.
Natural selection is best described as
A) increasing the perfection of a species. B) working on the existing variation of traits to favor those better suited to the organism's environment. C) causing the death of a significant proportion of the population. D) the ability to generate new traits that better suit the species. E) driving the species toward an eventual endpoint in which the species possesses the best possible adaptations for that particular environment.