Class XII Biology quiz chapter 2

What does the microsporangia develop into?

• Pollen grain

• Pollen tube

• Pollen sac

• Pollen mother cell

In a trnsverse section, a typical microsporangium appears in outline as

• Rectangular

• Longitudinal

• Circular

• Oval

Identify the homogeneous group of cells which occupy the centre of each microsporangium.

• Nucellus

• Synergid cells

• Sporogenous tissue

• Megaspore mother cell

This layer has a role in nourishing the developing pollen grains. Identify the layer.

After meiotic divisions, what do the cells of the sporogenous tissue form?

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The microspores ultimately dissociate from each other to form

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The .............. represent the male gametophyte

• Stamen

• Pollen grains

• Pollen sac

• Anther

The appertures on the pollen grain exine where sporopollenin is absent is called...................

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The intine of pollen grain is a thin layer made up of ......... and ........

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In over 60% angiosperms pollen grains are shed at this stage........

• 3 celled

• 2 celled

• 7 celled 8 nucleate

• 8 celled 7 nucleate