Environmental Science
In July, at middle latitudes in the Northern Hemisphere, the day is ____ long and is ____ with each passing day.

Less than 12 hours; getting shorter
More than 12 hours; getting longer
More than 12 hours; getting shorter
Less than 12 hours; getting longer

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Environmental Science
Which one is true?

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
symbiosis when neither population affects each other

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