Which of the following has the lowest boiling point?
A) heptane
B) hexane
C) octane
D) nonane
B
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What is the relationship between two species in which one species benefits from the interaction whereas the other species neither benefits nor is harmed?
Mutualism Commensalism Parasitism Advantagism
Why do seismic waves follow strongly curved paths as they move through the interior?
A) Their paths are altered by changes in temperature. B) Their paths are altered by reflection off dense materials. C) Their velocities are altered by changes in chemistry. D) Their velocities are changed because of increasing pressure with depth.
________ is to a point source of water pollution as ________ is to a nonpoint source of water pollution.
A. Golf course runoff; power plant effluent B. Power plant effluent; an underground coal mine drain C. Power plant effluent; golf course runoff D. Golf course runoff; atmospheric deposition E. Atmospheric deposition; golf course runoff
Which of the following was critical for the adaptation of reptiles to terrestrial ecosystems?
a. the amniote egg b. four legs c. exoskeleton d. endoskeleton e. exoskeletons and endoskeletons