A location with luxuriant growth of lichens on the trees indicates that the:-

1. trees are very healthy

2. trees are heavily infested

3. location is highly polluted

4. location is not polluted

In a population of 1000 individuals 360 belongs to genotype AA, 480 to Aa and the

remaining 160 to aa. Based on this data, the frequency of allele A in the population is

1. 0.4

2. 0.5

3. 0.6

4. 0.7

Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and

forelimbs of bats used in flying are an example of

1. analogous organs

2. adaptive radiation 

3. homologous organs

4. convergent evolution

Which one of the following are analogous structures?

1. Wings of bat and wings of pigeon

2. Gills of prawn and lungs of man

3. Thorns of Bougainvillea and tendrils of Cucurbita

4. Flippers of dolphin and legs of horse

The process by which organisms with different evolutionary history evolve similar

phenotypic adaptations in response to a common enviroment challenge, is called 

1. natural selection 

2. convergent evolution 

3. non-random evolution 

4. adaptive radiation 

The tendency of population to remain in genetic equilibrium may be disturbed by 

1. random mating

2. lack of migration 

3. lack of mutations

4. lack of random mating

The eyes of Octopus and eyes of cat show different patterns of structure, yet they

perform similar function. This is an example of

1. homologous organs that have evolved due to convergent evolution

2. homologous organs that have evolved due to divergent evolution

3. analogous organs that have evolved due to convergent evolution

4. analogous organs that have evolved due to divergent evolution

What is true about the isolated small tribal populations?

(1) There is a decline in population as boys marry girls only from their own tribe.

(2) Hereditary diseases like colourblindness do not spread in the isolated population.

(3) Wrestlers who develop strong body muscles in their life time pass this character on to their progeny.

(4) There is no change in population size as they have a large gene pool.

Among the human ancestors the brain size was more than 1000 cc in:

1. Homo neanderthalensis

2. Homo erectus

3. Ramapithecus

4. Homo habilis

Industrial melanism as observed in peppered moth proves that :

(1) the true black melanic forms arises by a recurring random mutation. 

(2) The melanic form of the moth has no selective advantage over lighter form in industrial area

(3) The lighter-form of the moth has no selective adavantage either in polluted industrial area or non-polluted area

(4) Melanism is a pollution- generated feature.