Preeti carried out an experiment. She took two transparent plastic jars and labeled them as A and B. She placed one cockroach in each of the jars. She covered jar A with a mosquito net and jar B with a polythene sheet. What will be her observation after a few hours?

Cockroach in the jar A will behave normally.

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Cockroach in the jar B will behave normally.

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Cockroach in the jar A will die.

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Cockroach in the jar B will die.

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Solution

The correct options are
A
Cockroach in the jar A will behave normally.

D
Cockroach in the jar B will die.

For sometime, cockroach in both the jars will behave normally. But after a while, the cockroach in jar B will become restless. Gradually this cockroach will become fatigued and will die.The cockroach in the jar A will remain normal. This experiment shows that oxygen is essential for the life of animals.

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