Mutations occur:
A. in every cell.
B. in somatic cells, but not in germ line cells.
C. in germ line cells, but not in somatic cells.
D. during development but not during adulthood.
A
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Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that _____
A) arthropods evolved before vertebrates did B) extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates C) ancestral arthropods must have been poorly adapted to aquatic life, and thus experienced a selective pressure to invade land D) vertebrates evolved from arthropods E) arthropods have had more time to coevolve with land plants than have vertebrates
Mycorrhizae
a. increase plant growth. b. are symbionts. c. allow a plant to absorb more water. d. increase the surface area for absorption of water and minerals. e. have all of these characteristics
Which method of gene transfer involves direct contact between the bacteria?
a. Conjugation. b. Transformation. c. Transduction.
Cryptococcosis can include
A) Bone infection B) Pulmonary infection C) Meningitis D) Septicemia E) All of these choices are correct