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Subject :NSO    Class : Class 4

Study the given food web carefully and answer the question that follows.



Which changes will result in an immediate decrease in the wolf population?
1. A decrease in the grass population
2. An increase in the tiger population
3. A decrease in the deer population
4. An increase in the rabbit population

A1 only
B1 and 2
C3 and 4
D1, 2 and 3


Ans 1:

Class : Class 5
B because in the first statement,if the grass population will decrease,rabbit population will also decrease as the rabbit exclusively feeds on the grass population and wolf exclusively feeds on the rabbit population.In the second statement,if the tiger population will increase,the rabbit population will decrease as the tiger exclusively feeds on the rabbit population and wolf exclusively feeds on the rabbit population.In the third statement,if the deer population will decrease,the wolf population will decrease as wolf feeds on the deer population.In the fourth statement,if the rabbit population will increase,the wolf population will also increase as wolf feeds on the rabbit population.

Ans 2:

Class : Class 5
b

Ans 3:

Class : Class 6
b

Ans 4:

Class : Class 4

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