Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Which important green-house gas, other than carbon dioxide, is being produced from the agricultural fields?

  • Arsine

  • Sulphur dioxide

  • Ammonia

  • Nitrous oxide


52.

Total number of bones in the hindlimb of a man is

  • 14

  • 21

  • 24

  • 30


53.

A woman with two genes (one on each X-chromosome) for haemophilia and one gene for colour blindness on the X-chromosome marries a normal man. How will the progeny be?

  • All sons and daughters are haemophilic and colourblind

  • Haemophilic and colourblind daughters

  • 50% haemophilic colourblind sons and 50% haemophilic sons

  • 50% haemophilic daughters and 50% colourblind daughters


54.

The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin, provides evidence for

  • Origin of species by natural selection

  • Intraspecific Variations

  • Intraspecific competition

  • Interspecific competition


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55.

The most important component of the oral contraceptive pills is

  • Progesterone

  • Growth hormone

  • Thyroxine

  • Luteinising hormone


A.

Progesterone

Use of Contraceptive pills is a widespread form of birth control. Contraceptive pills contain oestrogen and progesterone. The production of the pituitary hormones FSH and LH in the normal sexual cycle of a female is shut down by these hormones. In the absence of FSH, the ovarian follicles do not ripen and ovulation does not occur in the absence of LH.


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56.

The middle piece of the sperm contains

  • Proteins

  • Centriole

  • Nucleus

  • Mitochondria


57.

The term 'aquaculture means

  • Aspergillosis

  • Inland fisheries

  • Marine fisheries

  • Both (b) and (c)


58.

Active immunity means

  • Resistance developed after disease

  • Increasing quantity of blood

  • Resistance developed before the disease

  • Increasing rate of heart beat


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59.

Which of the following is mismatched?

  • Vitamin K- Beriberi

  • Vitamin D-Rickets

  • Vitamin C - Scurvy

  • Vitamin A-Xerophthalmia


60.

Secondary body cavity with segmented mesodermal lining is called

  • Haemocoel

  • Neurocoel

  • True Coelom

  • Pseudocoelom


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