Environmental Science
The most important human activity, leading to the extinction of wildlife, is

Hunting for valuable wildlife products
Introduction of alien species
Pollution of wildlife, is
Alternation and destruction of the natural habitats

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Environmental Science
Which one is true?

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

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

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

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