1. It is easier to carry a small body weight. 2. Smaller animals have a higher metabolic rate. 3. Small animals have a lower O ₂ requirement. 4. The efficiency of muscles in large animals is less than in the small animals.

Topic: Locomotion: movement types, muscle contraction· Human Physiology

It is much easier for a small animal to run uphill than for a large animal, because :

1. It is easier to carry a small body weight.

2. Smaller animals have a higher metabolic rate.

3. Small animals have a lower O\(_2\) requirement.

4. The efficiency of muscles in large animals is less than in the small animals.

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 Practice test neet Save WhatsApp Report

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Answer: 2. Smaller animals have a higher metabolic rate.

Smaller animals have a larger surface area to volume ratio and so a higher metabolic rate per unit body mass. They can supply energy quickly, so running uphill is easier for them.

Small animals do not have a lower O₂ requirement per unit mass, and muscle efficiency is not the stated reason.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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It is much easier for a small animal to run uphill than for a large animal, because :

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