Environmental Science
Which one is true?

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

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Environmental Science
The lag in daily temperature refers to the time lag between the:

Minimum and maximum solar energy received at the surface for a given day
Time of minimum temperature and the time of maximum solar radiation
Sunrise and sunset
Time of maximum solar radiation and the time of maximum temperature
Minimum and maximum temperature for a day

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