Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Which one of the following generally acts as an antagonist to gibberellins?

  • Zeatin

  • Ethylene

  • ABA

  • ABA

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12.

As compared to a dicot root, a monocot root has

  • more abundant secondary xylem

  • many xylem bundles

  • inconspicuous annual rings

  • inconspicuous annual rings

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13.

For its action, nitrogenase requires

  • high input of energy

  • light

  • Mn2+

  • Mn2+

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14.

Vernalisation stimulates flowering in

  • Zamikand

  • Turmeric

  • Carrot

  • Carrot


C.

Carrot

Vernalization is a process of shortening of juvenile or vegetative phase and hastening flowering by a previous cold treatment. Example - henbane, carrot, cabbage.

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15.

Plants with ovaries having only one or a few ovules, are generally pollinated by

  • Bees

  • Butterflies

  • Birds

  • Birds

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16.

Cuscuta is an example of

  • ectoparasitism

  • brood parasitism

  • predation

  • predation

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17.

The second stage of hydrosere is occupied by plants like

  • Azolla

  • Typha

  • Salix

  • Salix

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18.

Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them?

  • Pteropus and Ornithorhyncus - Viviparity

  • Garden lizard and Crocodile - Three chambered heart

  • Ascaris and Ancylostoma - Metameric segmentation

  • Ascaris and Ancylostoma - Metameric segmentation

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19.

Which one of the following categories of animals, is correctly described with no single exception in it?

  • All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal)

  • All bony fishes have four pairs of gills and an operculum on each side

  • All sponges are marine and have collared cells

  • All sponges are marine and have collared cells

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20.

Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature and correctly described?

  • Musca domestica – The common house lizard, a reptile

  • Plasmodium falciparum – A protozoan pathogen causing the most serious type of malaria

  • Felis tigris – The Indian tiger, well protected in Gir forests

  • Felis tigris – The Indian tiger, well protected in Gir forests

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