Environmental Science
MAB stands for

Man and biosphere
Mayer, Anderson and Bisby
Man, antibiotics and bacteria
Man and biotic community

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Environmental Science
Infrared and visible satellite images might provide:

A way of distinguishing between "new" and "old" clouds.
A way of distinguishing between wet and dry clouds.
A way of identifying clouds suitable for cloud seeding.
A way of determining cloud thickness and altitude.

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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 neither population affects each other
symbiosis when the interaction is useful to both the populations

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