It is much easier for a small animal to run Uphill than for a large animal, because
1. smaller animals have a higher metabolic rate
2. small animals have a lower O2 requirement
3. the efficiency of muscles in large animals is less than in the small animals
4. it is easier to carry a small body weight

Subtopic:  Response of Organisms to Abiotic Factors | Adaptations |
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NEET 2023 - Target Batch - Aryan Raj Singh