Environmental Science
The unfavourable alteration of environment due to human activities is termed as

ecological disturbance
pollution
catastrophe
ecological degradation

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Environmental Science
Which of the following is false?

The succession that occurs in newly cooled lava is called primary succession
The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
Quantity of biomass in a trophic level at a particular period is called as standing crop
Phytoplanktons are the pioneers in the aquatic ecosystem
Rate of succession is faster in secondary succession

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Environmental Science
Which one is true?

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

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