Standard Science Primary 3 Cycles

At which stage of its life cycle is the mosquito MOST difficult to kill using oil on the surface of water?

A Pupa
B Larva
C Adult
D Egg
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Worked Solution

Step 1: Oil is used to block breathing tubes of larvae and pupae in water. Step 2: The adult mosquito flies in the air and does not live in water. Step 3: Therefore, oil on water does not affect the adult stage.

Correct answer: Adult

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