Two species of frogs do not interbreed because one species breeds in March and the other species breeds in May. This is an example of
A) allopatric speciation.
B) sympatric speciation.
C) a prezygotic reproductive barrier.
D) a postzygotic reproductive barrier.
C
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Cordilleran orogenic activity is a result of a continental-continental collision between the Farallon and North
American plates. a. True b. False
The materials that formed the Earth and the ocean were formed within starts billions of years ago
Indicate whether the statement is true or false
Pahoehoe is most closely associated with:
a. shield volcanoes and cinder cones b. cinder cones and composite cones c. lava flows and shield volcanoes d. composite volcanoes and plug domes e. lava flows and plug domes
The sun emits light in a range of wavelengths, but the spectrum of wavelengths where the total energy hitting the earth is highest is the _________ spectrum
Fill in the blank(s) with the appropriate word(s).