Primary 4 Science — Cycles Practice | Standard

Standard Science Primary 4 Cycles

Why does the National Environment Agency (NEA) advise people to clear stagnant water to prevent the breeding of mosquitoes?

A To provide more space for adult mosquitoes to live.

B To kill the mosquitoes at the egg, larva and pupa stages.

C To ensure the mosquito eggs hatch faster.

D To stop the adult mosquitoes from flying.

Show Worked Solution

Worked Solution

Step 1: Recall the life cycle of a mosquito (Egg, Larva, Pupa, Adult). Step 2: Identify which stages live in water (Egg, Larva, Pupa). Step 3: Removing water prevents these stages from developing into adults.

Correct answer: To kill the mosquitoes at the egg, larva and pupa stages.

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