The splint bone of the present-day horse is a | vedclass

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(C) In the evolution of the horse,the ancestral forms had multiple digits. Over time,as the horse adapted to life on open grasslands,there was a reduc

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Second and fourth toes

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(C) In the evolution of the horse,the ancestral forms had multiple digits. Over time,as the horse adapted to life on open grasslands,there was a reduction in the number of digits. The modern horse $(Equus)$ has only one functional digit,which is the third digit. The splint bones found on either side of the cannon bone in the modern horse are the vestigial remnants of the second and fourth digits.

Column-$I$	Column-$II$
$(1)$ Charles Darwin	$(a)$ Mutation theory
$(2)$ Lamarck	$(b)$ Germ plasm theory
$(3)$ Hugo de Vries	$(c)$ Philosophie Zoologique
$(4)$ Ernst Haeckel	$(d)$ The Origin of Species
$(5)$ August Weismann	$(e)$ Biogenetic law
-	$(f)$ Essay on Population

The splint bone of the present-day horse is a vestige of which digit?

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Column-$I$ Column-$II$
$(1)$ Charles Darwin $(a)$ Mutation theory
$(2)$ Lamarck $(b)$ Germ plasm theory
$(3)$ Hugo de Vries $(c)$ Philosophie Zoologique
$(4)$ Ernst Haeckel $(d)$ The Origin of Species
$(5)$ August Weismann $(e)$ Biogenetic law
- $(f)$ Essay on Population

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