Q15 of 30 Page 1

Name the plant source of ganja. How does it affect the body of the abuser?

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Name the two special types of lymphocytes in humans. How do they differ in their roles in immune response?


Ganja is obtained from Cannabis sativa. Taken by inhalation and oral ingestion, these are known for their effects on cardiovascular system of the body, development of brain in adolescents and weakens immune system in the body of the abuser.


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Explain brood parasitism with the help of an example.

 14

Give reasons for the following:

(a) The human testes are located outside the abdominal cavity.


(b) Some organisms like honey-bees are called parthenogenetic animals.


 16

(a) Mention the cause and the body system affected by ADA deficiency in humans.

(b) Name the vector used for transferring ADA-DNA into the recipient cells in humans. Name the recipient cells.


 17

How did Ahmed Khan, plastic sacks manufacturer from Bangalore, solve the ever-increasing problem of accumulating plastic waste?