Question

Your uncle has come from the village to renew the contract to supply frogs to the laboratories of the colleges of the town. While talking to you, he mentioned that cases of malaria has increased in the village this year. In addition, population of grasshoppers has also increased who are damaging the crop. 

(i) What can be the reasons for the problem faced by the villagers ?

(ii) What do you learn from the incident ?

(iii) what suggestions will you give to your uncle ?

Answer 1

(i) Due to large scale removal of frogs, the population of frogs got reduced in the village. Due to absence of frogs in food. chain, grasshopper/mosquitoes - frog - snake' the population of grasshoppers and mosquitoes have gone up. Mosquitoes are the carries of malaria vector and grasshoppers damage the crop.

(ii) Every organism has a very important  role in nature and we should not disturb this food chain artificially. if one link is removed from the food chain, whole chain gets disturbed and new problems arises.

(iii) I will request him not to renew his contract for supply of frogs with the colleges. This will increase the frog population and population of mosquitoes and grasshoppers will decrease and a balance will be attained soon.