Environmental Science
Which functional feeding groups are involved in the process of in-stream physical breakdown of coarse material into fine particulate organic matter?

Collector gatherers
Grazers
Shredders
Collector filterers

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Environmental Science
Frost forms when:

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

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