The material, which arrests cell division, is obtained from from

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 Multiple Choice QuestionsMultiple Choice Questions

61.

Study the following statements and select the option with correct statements.

  1. Pulvinus leaf base is present in some leguminous plants
  2. In Eichhornia, the petioles expand becomes green and synthesise food.
  3. Opposite phyllotaxy is seen in guava.

  • I and II

  • I and III

  • II and III

  • I, II and III


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62.

The material, which arrests cell division, is obtained from

  • Crocus

  • Colchicum

  • Dalbergis

  • Chysanthomum


B.

Colchicum

Colchicine is an antibiotic drug, which is obtained from Colchicum (family-Liliaceae). It binds to one tubulin molecule an prevents its polymerisation. The depolymerisation of tubulin results in the disappearance of mitotic spindle blocking the cell's mitotic chromosomal division at metaphase and anaphase.


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63.

Three floral diagrams are given here. Their respective families are assigned in the answer key. Find out the families to which these diagrams belong to

  • A-Liliaceae, B-Asteraceae, C-Solanaceae

  • A-Asteraceae, B-Solanaceae, C-BRassicaceae

  •  A-Asteraceae, B-Solanaceae, C-Asteraceae

  •  A-Poaceae, B-Solanaceae, C-Asteraceae


64.

In Ruscus, the stem is a

  • Phyllode

  • Cladode

  • Offset

  • Sucker


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65.

Catkin inflorescence is found in

  • Wheat

  • Oat

  • Mulberry

  • Fig


66.

Epigynous flowers are present in

  • Mustad

  • Brinjal

  • China rose

  • Cucumber


67.

In Dianthus, placentation is

  • Basal

  • Free central

  • Axile

  • Marginal


68.

The term 'keel' is used for special type of

  • Sepals

  • Petals

  • Stamenstellen

  • Carpels


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69.

Coffee and quinine are obtained from the

  • Leguminosae

  • Asteraceae

  • Rubiaceae

  • Poaceae


70.

A fern prothallus is bisexual. If fertilisation takes place between their gametes than it is known as

  • cross- fertilisation

  • self- fertilisation

  • isogamous

  • viviparous


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