Environmental Science
A dim, "watery" sun visible through a gray sheet-like cloud layer is often a good indication of ____ clouds.

Stratocumulus
Cirrostratus
Altostratus
Nimbostratus
Cumulonimbus

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Environmental Science
A term biotype means

all individuals having same genotype
all individual with different phenotype
all individuals with different genotype
all individuals having same phenotype

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Environmental Science
Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the:

Conduction of heat through the interior of the earth
Release of latent heat to the atmosphere when polar ice melts
Concentration of earth's magnetic field lines at the poles
The insulating properties of snow
Circulation of heat by the atmosphere and oceans

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