Standard Science Primary 3 Cycles

At which stage of the mosquito's life cycle is it most difficult to kill using oil on the water surface?

A Pupa
B Egg
C Adult
D Larva
Show Worked Solution

Worked Solution

Step 1: Oil on water stops oxygen from reaching insects underwater. Step 2: Eggs, larvae, and pupae are all in or on the water. Step 3: Adult mosquitoes fly in the air and are not affected by oil on the water surface.

Correct answer: Adult

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free