Environmental Science
Frost forms when:

Objects on the ground cool below the dew point temperature.
Water vapor changes into ice without first becoming a liquid.
All of these
The dew point is 32oF or below.

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

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

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