Galapagos islands are located in

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.

From which ancestral groups did birds and mammals evolve?

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

Select the correct option for $X$ and $Y$ in the chart shown below.
[Chart Structure: Primitive Reptiles -> (Sauropsids,$X$); $X$ -> $Y$; $Y$ -> Therapsids]

Identify the figure given below: