Standard Science Primary 3 Cycles

Why do animals like cockroaches and grasshoppers moult during their nymph stage?

A To escape from predators
B To change their body colour
C To breathe more easily
D To allow their bodies to grow bigger
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Worked Solution

Step 1: Nymphs have a hard outer covering (exoskeleton) that does not grow. Step 2: To grow bigger, they must shed the old skin and grow a new, larger one. Step 3: This process is called moulting.

Correct answer: To allow their bodies to grow bigger

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