A. provide landing surface for the adult
B. prevent larva or pupa from attaching itself to the surface
C. prevent the water from overheating
D. lubricate the larva for easy movement
E. provide surface for laying their eggs
Correct Answer:
Option B – prevent larva or pupa from attaching itself to the surface
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![A quantity of hot water at 100ºC is added to 400g of water at 10ºC until the temperature of the mixture is 60ºC. Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A quantity of hot water at 100ºC is added to 400g of water at 10ºC until the temperature of the mixture is 60ºC. Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]")