Question

1.Plant fibres burn but do not shrink or melt. Their burning smell is similar to that of paper. Animal fibres normally shrink and burn but do not melt. Their burning smell is similar to burning hair. Burning which of these will give the smell of burning hair?
A. jute thread B. silk thread
C. cotton thread D. nylon thread

2. The presence of specific features or behaviour that enable an organism to live in its surroundings is called an adaptation. Which of the following is NOT an example of biological adaptation?
A. Birds migrate in flocks to warmer regions which protects them from the winter cold.
B. People have a tendency to cough which helps them clear congestion in the wind pipe.
C. Giraffes develop long necks which help them eat the leaves of tall trees.
D. People who play the drums have strong arms which help them play.

ANSWER BOTH

Answer 1

Answer:

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1. Silk fibre because it is protein and the other jute cotton thread are cellulosic and nylon is synthetic...

2. in my opinion first option Birds migrate in the floscks to warmer region which protects them from the winter cold...

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Explanation:

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