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| Column $X$ | Column $Y$ |
| $(1)$ Death | $(P)$ Measure of disorder |
| $(2)$ Earthworm | $(Q)$ Proponent of New Systematics |
| $(3)$ Entropy | $(R)$ Process maintaining life continuity |
| $(4)$ Huxley | $(S)$ Annelida |
| $(5)$ Reproduction | $(T)$ Process maintaining population size |
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