Environmental Science
Abyssal zone in ocean has

no sunlight but contain producers
sunlight and producers
no sunlight but contains decomposers and consumers
sunlight and decomposers

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Environmental Science
An important reason for the large daily temperature range over deserts is:

The ozone content of desert air is very low
There is little water vapor in the air to absorb and re-radiate infrared radiation
The light-colored sand radiates heat very rapidly at night
Free convection cells are unable to form above the hot desert ground
Dry air is a very poor heat conductor

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