Competition among individuals of different species is called
A. interspecific competition.
B. intraspecific competition.
C. resource competition.
D. basal competition.
E. commensalism.
A. interspecific competition.
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Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Sensitivity B. Energy utilization C. Cellular organization D. Homeostasis E. Evolutionary adaptation
Which of the following characteristics make(s) an organism well adapted to colonizing a
disturbed area?
a. Its seeds germinate quickly. b. It tolerates a wide range of environmental conditions and resources. c. It has a broad ecological niche. d. all of these
Four of the five answers listed below are
related conditions in which abnormal numbers of chromosomes are present. Select the EXCEPTION
a. monosomy b. aneuploidy c. polyploidy d. diploidy e. trisomy
In a particular DNA sequence, nonsynonymous substitutions occurring at a lower rate than synonymous substitutions would be evidence for
a. neutral evolution. b. negative selection. c. genetic hitchhiking. d. positive selection. e. mutational bias.