Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

A frog has its brain crushed. But when pinched on the leg, The leg draws away. It is an example of

  • neurotransmitter incluced response

  • simple reflex

  • conditioned reflex

  • automated motor response


12.

All veins carry deoxygenated blood except

  • pulmonary vein

  • hepatic vein

  • hepatic portal vein

  • renal vein


13.

Photorespiration usually occurs in

  • one cell organelle

  • two cell organelles

  • three cell organelles

  • four cell organelles


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14.

Clove is a

  • floral bud

  • modified root

  • auxillary bud

  • seed


A.

floral bud

Cloves are unopened and aromatic floral buds of a tree in the Family- Myrtaceae, Syzygium aromaticum. It is commonly used as a spice.


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15.

Velamen is a specialized tissue found in

  • aerial roots of orchids

  • succulent leaves

  • pneumatophores

  • stilt roots


16.

Hydroponics is

  • cultivation of plants in water

  • growth of plants towards water

  • growth of plants away from water

  • soil less cultivation of plants


17.

Coconut's husk fibre, coir of commerce is extracted from

  • epicarp

  • mesocarp

  • endocarp

  • all of these


18.

Induction of flowering by low temperature in plants is

  • cryobiology

  • vernalization

  • phototropism

  • pruning


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19.

The protists have

  • only free nucleic acid aggregates

  • membrane bound nucleoproteins lying embedded in the cytoplasm

  • nucleoprotein in direct contact with the rest of the cell substance

  • none of these


20.

Tadpoles can be made to grow in size and become adult by

  • injecting thyroxine hormone

  • feeding the eggs of other frogs

  • injecting gonadotrophic hormones

  • providing them with suitable climatic conditions


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