Environmental Science
Which one is true?

symbiosis when neither population affects each other
commensalism when none of the interacting populations affect each other
commensalism when the interaction is useful to both the populations
symbiosis when the interaction is useful to both the populations

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Environmental Science
Suppose it is a winter night and at about 11 p.m., the air cools to the dew-point temperature and a thick radiation fog develops. If the air continues to cool during the night, in 5 hours the dew point temperature will probably:

Decrease as the air becomes moister
Increase as the air becomes moister
Increase as the air becomes drier
Decrease as the air becomes drier

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