Multiple Choice Questions

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The vitamin which is essential for blood clotting is

  • Vitamin- A

  • Vitamin- B

  • Vitamin- C

  • Vitamin- K


D.

Vitamin- K

Vitamin- K plays an important role in blood clotting and prevents excessive bleeding. It is obtained from cabbage, spinach and other green leafy vegetables.

Vitamin- A is essential for the synthesis of rhodopsin of rod cells and iodopsin of cone cells of the retina of eye. It can be obtained from cod liver oil, beef liver, salmon etc.

Vitamin- D helps in the absorption of calcium and phosphorus by the intestine. It maintains the normal functioning of parathormone. it can be obtained from fishes such as tuna, salmon, egg yolks, cheese etc.


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The intermediate host of Schistosoma is

  • Snail

  • mosquito

  • housefly

  • sheep


Polyp phase is absent in

  • Hydra

  • Aurelia

  • Physalia

  • Obelia


In frog heart, there are cardiac muscles which consists of fibres called

  • Purkinje fibres

  • myonemes

  • telodendria

  • columnae carnae


The female genital pore of Pheretima posthuma located upon the segment

  • 14th

  • 16th

  • 18th

  • 15th


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The characteristic larva of Phylum- 'Coelenterata' is

  • planula

  • cysticercus

  • rhabdiform

  • wriggler


In blood, CO2 is transported majorly as

  • sodium carbonate

  • carboxyhaemoglobin

  • bicarbonate

  • CO2 as such


In Mollusca, eye is present over a stalk, called

  • ostracum

  • operculum

  • ommatophores

  • osphradium


Malphigian tubules are

  • excretory organs of insects

  • excretory organs of frog

  • respiratory organs of insects

  • endocrine glands of insects


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Tuberllarians are free living

  • nematodes

  • cestodes

  • flat worms

  • trematodes