TRANSPORTATION IN ANIMALS AND PLANT

                      `TRANSPORTATION IN ANIMALS AND PLANT


  Q.2.-Fill in the blanks :                                                                                                                             (i) The blood from the heart is transported to all parts of the body by the arteries.                                (ii) Haemoglobin is present in red blood cells                                                                                          iii) Arteries and veins are joined by a network of capillaries .                                                                (iv) The rhythmic expansion and contraction of the heart is called heartbeat.                                              (v) The main excretory product in human beings is urea.                                                                       (vi) Sweat contains water and salts.                                                                                                       (vii) Kidneys eliminate the waste materials in the liquid form called urine.                                        (viii) Water reaches great heights in the trees because of suction pull caused by transpiration.  

   Q.3.Choose the correct options:                                                                                                             (a) In plants, water is transported through                                                                                                (i) Xylem (ii) Phloem (iii) Stomata (iv) Root hair                                                                                       Ans.(a) (i) Xylem                                                                                                                                     (b) Water absorption through roots can be increased by keeping the plants (i) In the shade (ii) in dim light (iii) under the fan (iv) covered with a polythene bag                                                                            Ans.{b) (iii) under the fan

Q.4.Why is transport of materials necessary in a plant or an animal? Explain.  Ans. Transport of materials is necessary for plants or animals because due to it the nutrients and oxygen are made available to all the parts of the body. If the transport of necessary nutrients and oxygen does not take place in the body, the body will not be able to survive.

Q.5.What will happen if there are no platelets in the blood? 

Ans.The blood platelets are responsible for the clotting of the blood. When some injury occurs blood starts flowing. But it clots on its own. If there are no platelets, the blood will not be able to clot and keep on flowing. Huge loss of blood ultimately causes death.

Q.6.What are stomata? Give two junctions of stomata. 

 Ans.There is small openings on the lower surface of the leaves. These pores are called stomata. These openings are surrounded with guard cells

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