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 Multiple Choice QuestionsMultiple Choice Questions


Assertion : Many visitors to the hills suffer from skin and respiratory allergy problem.

Reason : Conifer trees produce a large quantity of wind-borne pollen grains.

  • If both Assertion and Reason are true and the reason is the correct explanation of the assertion

  • If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

  • If Assertion is true statement but Reason is false

  • If both Assertion and Reason are false statements


The plant part which consists of two generations, one within the other, is

  • genninated pollen grain

  • embryo

  • unfertilized ovule

  • seed



Dispersal of fruits in Opium (poppy) occur through shaking by wind by

  • explosive mechanism

  • parachute mechanism

  • censer mechanism

  • jacular mechanism


censer mechanism

In certain fruits the seeds are discharged through small openings on the fruits. The outlets are so narrow that only a few seeds can escape at a time.

The capitulum of sunflower, in which the seeds are heavy and not provided with pappus, shows a censer mechanism in the restricted escape of seeds when it is swung by wind.


The formation of gametophyte, from sporophyte, without spore formation or without meiosis is known as :

  • apospory

  • apogamy

  • parthenogenesis

  • none of these


Anemophillous flowers have :

  • sessile stigma

  • small and smooth stigma

  • coloured flower

  • large and feathery stigma


Which of the following is ideal for studying meiosis?

  • Gamete

  • Pollen

  • Microsporangium

  • Root


To which of the following flower 'synandrous' condition is found?

  • Sunflower (Helianthus sp)

  • Gourd (Cucurbita sp)

  • Pea (Pisum sativum)

  • Lemon (Citrus sp)


Study of pollen grain is called

  • Ethmology

  • Palynology

  • Palaeobotany

  • ω-taxonomy


Scientific name of sunflower is

  • Hibiscus rosa-sinensis

  • Solanum nigrum

  • Oryza sativa

  • Helianthus annuus


Ornithophily refers to the pollination by which of the following

  • insects

  • birds

  • snails

  • air