Environmental Science
Low clouds retard surface cooling at night better than clear skies because:

The formation of the clouds releases latent heat energy
The clouds start convection currents between them
The clouds absorb and radiate infrared energy back to earth
The water droplets in the clouds reflect infrared energy back to earth
The clouds are better conductors of heat than is the clear night air

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Environmental Science
A term biotype means

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

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Environmental Science
When clouds are viewed near the horizon, the individual cloud elements usually:

Appear farther apart than is actually the case
Appear closer together than is actually the case
Appear to have more vertical development than is actually the case
Appear lighter in color than is actually the case

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