The effect of resource availability on population size ultimately determines ____.
A. the carrying capacity of the environment
B. exponential growth
C. the doubling time of a population
D. the population’s biotic potential
E. the loss of species in an ecosystem
Answer: A
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An anthropologist discovers the fossilized heart of an extinct animal
The evidence indicates that the organism's heart was large, was well-formed, and had four chambers, with no connection between the right and left sides. A reasonable conclusion supported by these observations is that the _____. A) animal had evolved from birds B) animal was endothermic and had a high metabolic rate C) animal was most closely related to alligators and crocodiles D) animal was likely an invertebrate animal E) species had little to no need to regulate blood pressure
Nervous system cells that send and receive electrical signals, for example, when a dog is anticipating
the throwing of a Frisbee, are called
a. receptors. b. neurons. c. sensors. d. glial cells. e. signal cells.
Host specificity of a virus is due to
A) particular genes that it shares with the infected cell. B) the presence of an envelope. C) differences in size between the virus and the host cell. D) the presence or absence of a cell wall on the host cell. E) interactions between viral and cellular surface molecules.
When implementing the scientific method, one moves from a research question to a proposed idea based on limited evidence that justifies further investigation, also known as a:
A. determining function. B. hypothesis. C. test statistic. D. p-value.