Some organisms suspend their metabolic activities to survive in unfavourable conditions. Explain with the help of any four examples.

Explanation

### Step-by-Step Text Solution

1. **Introduction to Metabolic Suspension**:
Some organisms have evolved mechanisms to suspend their metabolic activities in response to unfavorable environmental conditions. This adaptation helps them survive until conditions improve.

2. **Example 1: Polar Bear (Hibernation)**:
- Polar bears enter a state known as hibernation during extreme cold conditions.
- In this state, their metabolic rate significantly decreases, allowing them to conserve energy.
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