MCQ
If two or more species occupy overlapping areas, they are:
- ASibling.
- BAllochronic.
- CKeystone.
- DSympatric.
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| Column$-I$ | Column$-II$ |
| $(a)$. A vector of disease | $(i)$ Bombyx |
| $(b)$. A gregarious pest | $(ii)$ Limulus |
| $(c)$. A living fossil | $(iii)$ Locusta |
| $(d)$. An economically important insect | $(iv)$ Culex |