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In the evolution of man, several changes occurred in the ancestral characters. Which one of the following changes is irrelevant in this context?

1. Loss of tail from body
2. Increase in the ability to communicate with others and develop community behaviour
3. Change of diet from fruits, hard nuts and roots to softer food
4. Perfection in the structure and working of hand for tool-making

Correct answer: Change of diet from fruits, hard nuts and roots to softer food

Solution

The irrelevant change is the one that does not describe a recognized evolutionary change in ancestral human characters. Diet shifting from fruits, hard nuts, and roots to softer food is not a standard ancestral character change like loss of tail, improved communication, or hand specialization.

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