Question

3..
किन कारणों से किशोरावस्था को 'स्वयं' की पहचान बनाने के संदर्भ में कठिन समय माना जाता है
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Answer 1

Explanation:

Answer:

Step-by-step explanation:

ANSWER:-

1) The existence of decomposers is essential in a biosphere.

This is because:-

Decomposers are the organisms and microorganisms that help to decompose waste and biodegradable matter.

Decomposers are essential as without them we would see heaps of waste everywhere.

For Example:-

If you see , we need to clean an aquarium on daily basis but not ponds and lakes. This is because aquarium lacks decomposers.

i) Flow of energy in a food chain is unidirectional.

This is because:-

The flow of energy starts from Autotrophs, and the plants derive their energy from the Sun.

We see that the food chain is upto 3 to 4 stages.

This is because maximum amount of energy is lost from 1st to 2nd level, and other in metabolic process , so for next progression energy levels slow down. Hence it does not revert back also.

m) Damage to the ozone layer is a cause for concern.

This is because:-

Ozone layer is protective layer. Its formula is \sf{O_3}O

3

Oxygen is a survival gas for many organisms but Ozone is a deadly poison.

It protects us from UV ie UltraViolet Rays. These rays are known to cause skin cancer.

So, the Ozone layer is being degraded by use of CFC's , hence it is a need to look after this issue.