Identify the incorrect statement regarding the stability of a biological community.

  • A
    $A$ stable community should not show too much variation in productivity from year to year.
  • B
    $A$ stable community must be resistant to occasional disturbances.
  • C
    $A$ stable community should have high levels of interspecific hybridization.
  • D
    $A$ stable community should be resistant to invasions by alien species.

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Assertion: Communities that comprise of more species tend to be more stable.
Reason: $A$ higher number of species results in less animal variation in total biomass.

State the contributions of the following scientists:
$(i)$ Alexander von Humboldt
$(ii)$ David Tilman
$(iii)$ Paul Ehrlich

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