Question

One observed the temporary mount of a leaf peel under a compound microscope and found one pore as an elliptical pore and the other kidney shaped. Name them

Answer 1

The elliptical pore is the stoma (plural is ‘stomata’) and the kidney-shaped cells are ‘guard cells’.

Stomata

The stomata facilitate gaseous exchange during photosynthesis and respiration.

In addition, water vapor diffuses through them into the atmosphere during transpiration.  

The number, size and distribution of stomata vary widely across the type of plants.

Guard Cells

The guard cells are a pair of specialized parenchyma cells that are present on each side of the stoma.

They are responsible for regulating the size of the stomatal opening making it open or closed.  

Know more:

What are the functions of stomata? state 3 points.

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In some plants stomata open at night give example of such plants. Explain giving reason the unusual behaviour of plants

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