Natural selection can be defined as ________
A) the evolution of a population of organisms
B) a process in which changes in gene frequencies result from evolution
C) the production of more offspring than can survive in a given environment
D) a process in which organisms with certain inherited traits are more likely to survive and reproduce than individuals with other traits
D
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You are a forester charged with increasing productivity in a South American forest newly planted with pines from Oregon
You believe that the southern forest lacks the fungal diversity needed by the North American pines, and that this lack of fungi is affecting the pines' productivity, but you have no evidence to support your ideas. To count how many fungal species were present in the Oregon forest, which methodology would you choose? A) Count all the plant species and multiply by six, as David Hawksworth did when determining the ratio of fungal to plant species in England. B) Collect all the fruiting structures (mushrooms, morels, etc.) found above ground. C) Do direct sequencing on representative soil samples from across the forest. D) Expose the trees to radiolabeled carbon dioxide and then collect the soil samples with the greatest radioactivity and do direct sequencing.
Human vocal cords are located in the
a. glottis. b. pharynx. c. trachea. d. larynx. e. bronchus
The form of nitrogen most likely to be absorbed from the soil by plants is
A. nitrous oxide gas. B. nitrogenous wastes. C. nitrogen gas. D. nitrite/nitrate ions. E. nucleic acids.
The malarial stage infecting red blood cells of humans are the
A. neophytes B. gametocytes C. saprophytes D. merozoites E. sporozoites