1. When more than one adaptive radiationsappeared to have occurred in an isolatedgeographical area, this is called as :
(1) Convergent evolution
(2) Divergent evolution
(3) Retrogressive evolution
(4) Continuous evolution

2. Which one of the following is a commonancestor of birds, mammals and crocodiles ?

(1) Sauropsids 

(2) Synapsids

(3) Early reptiles 

(4) Pelycosaurs

3. According to Hugo de Vries :

(1) Mutation are small and directionless

(2) Mutations are large and random

(3) Mutation can't cause speciation

(4) Mutations are the non-heritable variations

4. Which phenomenon brings by chance change ingene frequency in a small and isolated population ?

(1) Gene flow 

(2) Natural selection

(3) Random mating 

(4) Genetic drift

5. A process in which heritable variation enablingbetter survival are enabled to reproduce andleave greater number of progeny is called :-

(1) Natural selection 

(2) Genetic drift

(3) Founder effect 

(4) Saltation