Why is life based on carbon-based molecules?
A. Because carbon has unique ionic properties
B. Because a single carbon can bond with up to eight other atoms
C. Because a single carbon can bond with up to four other atoms
D. Because carbon is found everywhere
Answer: C
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Five new individuals were added to this small population in 1986 and ten more were added between 1990-1994. According to the figure above, what occurred in this population after these additions?
A) The population increased exponentially. B) The population increased in overall numbers. C) The population growth rate increased. D) The population continued to decline
Biomagnification involves compounds having higher relative concentrations in ________.
A. lower trophic levels B. top consumers or higher trophic levels C. higher trophic levels D. top consumers
Inflammation of the transparent membrane lining the inside of the eyelids is
a. hyperopia. b. astigmatism. c. myopia. d. conjunctivitis. e. trachoma.
Along coastlines, the area between high tide and low tide is the
A. hydrothermal vent. B. continental shelf. C. intertidal zone. D. estuary. E. open ocean.