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NEET Biology Solved Question Paper 2012

Multiple Choice Questions

51.
Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as

Adaptive radiation

Natural selection

Migration

Migration

Adaptive radiation

The diversification of an ancestral group into two or more species in different habitats is called divergent evolution. When this involves large number of species to occupy different ritches, this is called adaptive radiation. Adaptive radiation is the process of evolution of different species in a given geographical area starting from a species of animals or plants and literally radiating to other areas of geography (habitats). Darwin's finches represent one of best examples of this phenomenon. Australian marsupials are another example of adaptive radiation.

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52.

What is the figure given below showing in particular?

Ovarian cancer
Uterine cancer
Tubectomy
Tubectomy

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53.

In an area where DDT had been used extensively, the population of birds declined significantly because

birds stopped laying eggs
earthworms in the area got eradicated
cobras were feeding exclusively on birds
cobras were feeding exclusively on birds

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54.

The figure below is the diagrammatic representation o the E.Coli vector pBR 322. Which one of the given options correctly identifies its certain components(s)?

Ori- original restriction enzyme
rop-reduced osmotic pressure
Hind III, Eco RI-selectable markers
Hind III, Eco RI-selectable markers

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55.

The common bottle cork is a product of

dermatogen
Phellogen
Xylem
Xylem

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56.

Widal test is carried out to test

malaria
diabetes mellitus
HIV/AIDS
HIV/AIDS

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57.

Which part would be most suitable for raising virus-free plants for micropropagation?

Bark
Vascular tissue
Meristem
Meristem

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58.

Which one of the following is a wrong statement

Most of the forests have been lost in tropical areas
Ozone in upper part of atmosphere is harmful to animals
Greenhouse effect is a natural Phenomenon
Greenhouse effect is a natural Phenomenon

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59.

Common cold differs from pneumonia in that

pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease
Pneumonia can be prevented by a live attenuated bacterial vaccine whereas the common cold has no effective vaccine
Pneumonia is caused by a virus while the common cold is caused by the bacterium haemophilus influenzae
Pneumonia is caused by a virus while the common cold is caused by the bacterium haemophilus influenzae

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