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 Multiple Choice QuestionsMultiple Choice Questions

31.

Perigynous flowers are found in

  • guava

  • cucumber

  • China rose

  • China rose

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32.

Leaves become modified into spines in

  • Opuntia

  • pea

  • onion

  • onion


A.

Opuntia

Leaves are modified into spines in Opuntia (xerophytes) so as to reduce the surface area and minimize rate of water loss by evaporation and transpiration. Besides, they also provide protection to the plant from grazing animals. 
In pea, the leaves are modified into tendrils to help them in climbing around support, in onion leaves are modified to fleshy succulent to store food. 

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33.

The hilum is a scar on the 

  • seed, where funicle was attached

  • fruit, where it was attached to pedicel

  • fruit, where style was present

  • fruit, where style was present

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34.

The hilum is a scar on the

  • seed, where funicle was attached

  • fruit, where it was attached to pedicel

  • fruit, where style was present

  • fruit, where style was present

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35.

Flowers are zygomorphic on 

  • Gulmohur

  • tomato

  • datura

  • datura

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36.

The ovary is half inferior in flowers of 

  • cucumber

  • cotton

  • guava

  • guava

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37.

Whorled, simple leaves with reticulate venation are present in

  • Calotropis

  • Neem

  • China rose

  • China rose

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38.

Which one of the following diagrams represents the placentation in Dianthus? 

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39.

In unilocular ovary with a single ovule, the placentation is 

  • marginal

  • basal

  • free central 

  • free central 

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40.

Ovary is half -inferior in the flowers of 

  • guava

  • plum

  • brinjal

  • brinjal

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