If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Ecology and Environment — quick quiz

5 real NSEB questions on Ecology and Environment. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

HARD

A pond ecosystem receives constant nutrient input from agricultural runoff. Initially, phytoplankton density increases rapidly, followed by a decline in dissolved oxygen levels leading to fish mortality. Which ecological principle best explains this sequence of events?