In a field experiment, when all the starfish were removed f…

Biology Organisms and Populations Populations Attributes Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

In a field experiment, when all the starfish were removed from an enclosed intertidal area more than _________

__________ species of invertebrates become extinct within a year, because of __________ – 10, – 10, – 20, – 20,

__________ completion. – Intra-specific – Inter-specific – Intra-specific – Inter-specific

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The correct answer is:

In this famous experiment by Robert Paine, the removal of the starfish Pisaster (a keystone predator) allowed the remaining prey species to compete so intensely with each other (inter-specific competition) that more than 10 species of invertebrates were eliminated from the area.

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