Environmental Science
An ideal shelter for housing a temperature-measurement instrument should be:

Both white and in the shade
In the shade
Black
Both black and in the shade
White

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Environmental Science
Which one is true?

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

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