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Which of the following is not a characteristic of RBC?

The RBCs or Erythrocytes are the cells found in highest number in the blood. They are disc-shaped, biconcave cells. They are red in color, hence the name Red Blood Cells, or Erythrocytes (erythro = red cyte =cell) , due to the presence of pigment haemoglobin, which acts as an oxygen carrier for the blood. The cells lack a nucleus and most other cellular organelles. Thus, the nucleus of different shapes is not seen in RBC.

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2

Observe the illustration of the lungs, the heart, and body parts.


Copy the illustration and connect the lungs and body parts to the heart using lines. Also, show the route of blood flow.

 3

Observe the figure showing the transportation of water and minerals plants.


a. Identify the vascular tissues as indicated by A and B.


b. Name the processes that help water absorbed by the roots to reach the leaves.


c. In some plants, the rate of transpiration is very high. Does it affect the availability of water in that locality? Why?