Oceanic ridges represent ________ percent of the earth's surface
A) 30 B) 10 C) 5 D) 20
D
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Submarine sonar systems can cause ____________ pollution that negatively affects whales and other organisms in the
ocean. Fill in the blank(s) with the appropriate word(s).
Meteorology entered the space age on April 1, ________, when the first weather satellite was launched into space
A) 1980 B) 1920 C) 1945 D) 1960
The ________ part of the Rockies receives the most precipitation
A) Western B) Eastern C) Northern D) Southern
Imagine the river dries and the squirrel populations again share the same physical area. But they cannot interbreed. Evolutionary forces have acted independently on the populations while they were separated by the river, and ____________ has occurred.
a. selective forces b. more c. allopatric speciation d. microevolutionary events e. communicate f. interbreed g. less h. gene pool i. symmetric speciation j. macroevolutionary events