The phylogenetic tree of dinosaurs is given below. What do $P$ and $Q$ represent?

The $Jurassic$ period of the $Mesozoic$ era is characterized by:

Match List $- I$ with List $- II.$

List $- I$	List $- II$
$(a)$ Adaptive radiation	$(i)$ Selection of resistant varieties due to excessive use of herbicides and pesticides
$(b)$ Convergent evolution	$(ii)$ Bones of forelimbs in Man and Whale
$(c)$ Divergent evolution	$(iii)$ Wings of Butterfly and Bird
$(d)$ Evolution by anthropogenic action	$(iv)$ Darwin Finches

Choose the correct answer from the options given below.

Which of the following are the wrong statements?
$I.$ Organs which are different in basic structure and origin but perform similar functions are called analogous organs.
$II.$ Organs with different basic structure and origin but perform similar functions are called homologous organs.
$III.$ Homologous organs lead to convergent evolution.
$IV.$ Analogous organs lead to divergent evolution.
The correct combination is:

Gene flow occurs through generations. Gene flow can occur across language barriers in humans. If we have a technique of measuring specific allele frequencies in different populations of the world,can we not predict human migratory patterns in pre-history and history? Do you agree or disagree? Provide an explanation for your answer.

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