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
A.
natural selection whereby the darker forms were selected
The given case in an example of natural selection. As a result of the struggle for existence only those organisms could survive, which have favourable variations to adapt environmental conditions on with so many variations in populations of species the struggle for existence results in survival of the fittest. The survival of the fittest is the result of selection and proliferation of only those organisms, which were most suitably adapted the environment and most successful in mating, ie, natural selection.
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
Among the human ancestors the brain size was more that 1000 CC in
Homo neander-thalensis
Homo erectus
Ramapithecus
Ramapithecus
Darwin's finches are an excellent example of
adaptive radiation
seasonal migration
brood parasitism
brood parasitism
Darwin's finches are a good example of
industrial melanism
connecting link
adaptive radiation
adaptive radiation
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
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
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
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
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
