A population will not exist in Handy - Weinberg equilibrium if

• individuals mate selectively

• there are no mutations

• there is no migration

• there is no migration

What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors? 

• shortening of jaws

• Binocular vision

• Increasing brain capacity 

• Increasing brain capacity 

Darwin's finches are a good example of 

• industrial melanism

• connecting link

• adaptive radiation

• adaptive radiation

Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements. 

A) Wings of butterfly and birds look alike and are the results of ...... (i) .... evolution.

B) Miller showed that CH₄, H₂, NH₃, and .....(i) ....., when exposed to electric discharge in a flask resulted in the information of ......(ii) .....

C) The vermiform appendix is a ..... (i) ..... organ and a ......(ii) ..... evidence of evolution.

D) according to Darwin evolution took place due to ....(i) ...... and .....(ii) .... of the fittest.

• (D)-(i) small variations, (ii) survival, (A)-(i) convergent

• (A)- (i) convergent, (B)-(i) oxygen,(ii) nucleosides

• (B)-(i) water vapour, (ii) amino acids (C)-(i) rudimentary, (ii) anatomical

• (B)-(i) water vapour, (ii) amino acids (C)-(i) rudimentary, (ii) anatomical

The most apparent change during the evolutionary history of Homo sapiens is traced in

• loss of body hair

• walking upright

• shortening of the jaws

• shortening of the jaws

In the case of peppered moth (Biston betularia), the black-coloured form became dominant over the light-coloured form in England during the industrial revolution. This is an example of

• natural selection whereby the darker forms were selected

• the appearance of the darker coloured individuals due to very poor sunlight

• protective mimicry

• protective mimicry

Darwin's finches are an excellent example of 

• adaptive radiation

• seasonal migration

• brood parasitism

• brood parasitism

Which one of the following is incorrect about the characteristics of protobionts  (coacervates and microspheres) as envisaged in the abiogenic origin of life? 

• They were able to reproduce

• They could separate combinations of molecules from the surroundings

• They were partially isolated from the surroundings

• They were partially isolated from the surroundings

29.

One of the important consequences of geographical isolation is

• no change in the isolated fauna

• preventing speciation

• speciation through reproductive isolation

• speciation through reproductive isolation

Among the human ancestors the brain size was more that 1000 CC in

• Homo neander-thalensis

• Homo erectus

• Ramapithecus

• Ramapithecus