Ecosystems are most easily distinguished from one another by the ____ that are present in that system
a. autotrophs
b. abiotics
c. heterotrophs
d. decomposers
A
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At the periphery of a hurricane the air is __________, and several kilometers above the surface,
in the eye, the air is __________. a. sinking, sinking b. sinking, rising c. rising, sinking d. rising, rising
An explanation for Sub-Saharan Africa's relatively poor soils is
A) that most of the region's soils are old. B) the lack of alluvial lowlands. C) the extensive glaciation of the continent during the last ice age. D) that the soils that are old and the lack of alluvial lowlands. E) the lack of extensive glaciation and older soils.
Although Pluto was once designated the ninth planet, it has been reclassified as a(n) ____
a. rogue planet b. comet c. dwarf planet d. asteroid e. gas planet
Which is an example of contagious diffusion?
A) English colonists bringing their language to America B) the introduction of tulip farms in Michigan by Dutch immigrants C) the sharing of music preferences among a group of friends D) the construction of Buddhist temples in Los Angeles