Environmental Science
Where cold surface air replaces warm air, the boundary separating the different bodies of air is:

A cold front
A warm front
A parallel of latitude
A tornado

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Environmental Science
The earth's radiative equilibrium temperature is:

The average temperature the earth must maintain to prevent the oceans from freezing solid
The temperature at which the earth is absorbing solar radiation and emitting infrared radiation at equal rates
The temperature at which the earth is radiating energy at maximum intensity
The temperature at which rates of evaporation and condensation on the earth are in balance

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Environmental Science
Which among the following is related to the word Mesoderm ?

Binomial system of classification
Forms blood and bone (leads to complex internal organs)
Anatomically advanced animals having all three germ layers
No membrane-bound organelles, no peptidoglycan in cell walls, introns

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