The greatest evolutionary change enabling land vertebrates to be completely free from the water habitat was the development of:

Long-term adaptation is helpful in which of the following?

Which of the following refer to incorrect example$(s)$ of organisms which have evolved due to changes in environment brought about by anthropogenic action?
$(a)$ Darwin's Finches of Galapagos islands.
$(b)$ Herbicide resistant weeds.
$(c)$ Drug resistant eukaryotes.
$(d)$ Homologous organ in Bat and Man

Which of the following is the largest terrestrial dinosaur?

Scientists believe that evolution is gradual. However,extinction,which is a part of the evolutionary story,is often 'sudden' and 'abrupt' and also group-specific. Comment on whether a natural disaster can be the cause of the extinction of species.

Match the scientists with their respective contributions: Hugo de Vries,Hardy-Weinberg,and Ernst Haeckel.