Why are native trees more diverse in North America than in Europe?
A) The larger ice sheets in North America caused more species to go extinct.
B) North American trees expanded into mountain ranges during glaciations.
C) European trees were trapped between the ice sheet and E-W trending mountain ranges.
D) North American trees are all of tropical origin.
C
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A higher proportion of black daisies on Daisy World can impact the hydrologic cycle leading to
A) higher temperatures, more evaporation, and more cloud cover, with the retention of greenhouse water vapor trapping more outgoing longwave radiation. B) higher temperatures, less evaporation, and less cloud cover, with less retention of greenhouse water vapor trapping more outgoing longwave radiation. C) lower temperatures, more evaporation, and more cloud cover, with the retention of greenhouse water vapor trapping more outgoing longwave radiation. D) lower temperatures, less evaporation, and less cloud cover, with less retention of greenhouse water vapor trapping more outgoing longwave radiation.
For cyclogenesis to occur along a frontal wave, the winds aloft directly above the wave shouldbe:a
diverging. b. converging. c. blowing straight from west to east. d. increasing in speed uniformly over a broad area.
Which of the following best matches the description?Molecule or atom which has lost or gained an electron.
A. pH B. potential energy C. base D. nucleus E. combustion F. neutron G. ion H. acid I. entropy J. proton K. kinetic energy L. photosynthesis M. isotope N. enzyme O. electron P. latent heat Q. respiration
When unstable air is forced to rise, towering clouds and stormy conditions are expected
Indicate whether the statement is true or false