Which of the following refer to correct example$(s)$ of organisms which have evolved due to changes in environment brought about by anthropogenic action?
$(a)$ Darwin's Finches
$(b)$ Herbicide-resistant weeds
$(c)$ Drug-resistant eukaryotes
$(d)$ Man-created breeds of domesticated animals like dogs

  • A
    Only $(d)$
  • B
    Only $(a)$
  • C
    $(a)$ and $(c)$
  • D
    $(b), (c)$ and $(d)$

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First dinosaurs and first egg-laying mammals originated in which period?

Assertion: From an evolutionary point of view,the human gestation period is believed to be shortening.
Reason: One major evolutionary trend in humans has been the larger head undergoing a relatively faster growth rate in the foetal stage.

Identify the dinosaur shown in the figure.

Match the factors of modern synthetic theory/speciation in Column $I$ with the examples in Column $II$ and select the correct option.
Column $I$Column $II$
$A$. Natural selection$I$. Darwin's finches
$B$. Geographical isolation$II$. Mule
$C$. Hybrid sterility$III$. Cichlid fishes in Lake Victoria
$D$. Sympatric speciation$IV$. Biston carbonaria

Cleidoic egg is an adaptation for

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