Question

what are stomata ?write their functions class 7 plz answer me ncert book ch1​

Answer 1

Answer:

Explanation:

Stomata are tiny openings or pores in plant tissue that allow for gas exchange. ... Specialized cells known as guard cells surround stomata and function to open and close stomatal pores. Stomata allow a plant to take in carbon dioxide, which is needed for photosynthesis.

Answer 2

Definition :-Stomata are tiny openings or pores in plant tissue that allow for gas exchange

It's functions are :-

1) It helps in the gaseous exchange

2) It helps in temperature regulation

3) It helps in ascent of sap {This point is not for class 7}

4) It helps in transpiration ..{This point is not for class 7}

Additional information :-

Types of Stomata

Stomata can be grouped into different types base on the number and characteristics of the surrounding subsidiary cells. Examples of different types of stomata include:

Anomocytic Stomata: Possess irregularly shaped cells, similar to epidermal cells, that surround each stoma.

Anisocytic Stomata: Features include an unequal number of subsidiary cells (three) surrounding each stoma. Two of these cells are significantly larger than the third.

Diacytic Stomata: Stomata are surrounded by two subsidiary cells that are perpendicular to each stoma.

Paracytic Stomata: Two subsidiary cells are arranged parallel to the guard cells and stomatal pore.

Gramineous Stomata: The guard cells are narrow in the middle and wider at the ends. The subsidiary cells are parallel to the guard cells.

Transpiration :-

Transpiration is a term used for the release and evaporation of water from all plants including trees. The water is released out and into the Earth's atmosphere. Nearly 90% of this water exits the tree in the form of vapor through small pores called stomata on leaves. The leaf cuticle covering located on the surface of leaves and corky lenticels located on the surface of stems also provides some moisture.