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Keystone species

3 PYQ across 2 exams · 2000–2026 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

CSE 2000 → GEO 2025
20001 PYQ
CSEQ24
Within biological communities, some species are important in determining the ability of a large number of other species to persist in the co…
20251 PYQ
GEOQ100
Which one of the following species disproportionately affects ecosystem dynamics?…
20261 PYQ
GEOQ98
Consider the following statements : I. Keystone species is an organism that has a disproportionately large effect on its environment relativ…
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