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 Multiple Choice QuestionsMultiple Choice Questions

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151.

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


B.

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

Some trees of hill like oak, ash, elm, hickory, pecan and mountain cedar produce allergic pollen grains which cause allergy to people. Signs and Symptoms of pollen allergy are
(i) sneezing

(ii) itching eyes, nose and throat

(iii) dark circles under the eyes caused by restricted blood flow near the sinuses

(iv) watering eyes

(v) conjunctivitis

Conifer trees produce a large quantity of wind borne pollen grains because many pollen grains are destroyed in the process of pollination done by wind.


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152.

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

  • genninated pollen grain

  • embryo

  • unfertilized ovule

  • seed


153.

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

  • explosive mechanism

  • parachute mechanism

  • censer mechanism

  • jacular mechanism


154.

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

  • apospory

  • apogamy

  • parthenogenesis

  • none of these


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155.

Anemophillous flowers have :

  • sessile stigma

  • small and smooth stigma

  • coloured flower

  • large and feathery stigma


156.

Which of the following is ideal for studying meiosis?

  • Gamete

  • Pollen

  • Microsporangium

  • Root


157.

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

  • Sunflower (Helianthus sp)

  • Gourd (Cucurbita sp)

  • Pea (Pisum sativum)

  • Lemon (Citrus sp)


158.

Study of pollen grain is called

  • Ethmology

  • Palynology

  • Palaeobotany

  • ω-taxonomy


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159.

Scientific name of sunflower is

  • Hibiscus rosa-sinensis

  • Solanum nigrum

  • Oryza sativa

  • Helianthus annuus


160.

Ornithophily refers to the pollination by which of the following

  • insects

  • birds

  • snails

  • air


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