Which of the following statements about the Aral Sea is false?
a. Water has been diverted from the Aral Sea and the two rivers that replenish its water for use in manufacturing.
b. The volume of the Aral Sea has dropped by 90%.
c. The salinity levels have risen dramatically.
d. Most native fish species have disappeared.
e. Salts carried by the wind from the dried up lake basin are negatively impacting local crops.
A
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A population of beetles in which some individuals are blue and some individuals are green evolves by chance because more alleles of one color are transmitted to the next generation than alleles of the other color. This mechanism of evolution is known as
A. natural selection. B. mutation pressure. C. genetic drift. D. gene flow.
Punctuated equilibrium is the gradual accumulation of minor changes eventually resulting in the origin of a new
species. a. True b. False
The outer, rigid part of the Earth consisting of the upper mantle, oceanic crust, and continental
crust; this layer is divided into plates: a. lithosphere d. biosphere b. asthenosphere e. mesosphere c. atmosphere
Which of these numbers represents the lower limit, or lower estimate,
of sea-level rise? What will be an ideal response?