NCERT Class VII Science Solutions: Chapter 11-Transportation in Animals and Plants Part 3

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Question 6:

What are stomata? Give two functions of stomata.

Answer:

The numerous pores under the surface of leaf are called stomata. Transpiration and exchange of gases (carbon dioxide and oxygen) are the main functions of stomata.

As showing in Image is a result for stomata

Result for Stomata

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Question 7:

Does transpiration serve any useful function in the plants? Explain.

Answer:

Transpiration serves very important function in plants. Transpiration creates the transpiration pull, which is responsible for the rise of water to great heights in tall plants and other trees.

As showing in Image is a Transpiration

Transpiration

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Question 8:

What are the components of blood?

Answer:

Blood is a liquid, which has cells of various kinds suspended in it. Main components of blood are:

This diagram shows components of blood

Components of Blood

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  • Plasma: The fluid part of the blood is called plasma.

  • RBC: One type of cells are the red blood cells (RBC) which contain a red pigment called haemoglobin.

  • WBC: The blood also has white blood cells (WBC) which fight against germs that may enter our body.

  • Platelets: The clotting of blood is caused by another type of cells in the blood, called platelets.