What type of eggs are laid by Aedes and Psorophora?

• A. Single eggs with floats
• B. Egg rafts
• C. Single eggs that are desiccation resistant
• D. Desiccation susceptible eggs

Answer: (C)

The main idea here is that certain mosquito eggs are built to survive dry periods. Aedes and Psorophora lay their eggs as single, individual eggs, not in rafts or clusters, and these eggs are desiccation resistant. That means they can endure drying out for extended times and only hatch when they’re later submerged in water, such as after rainfall fills a container or a temporary pool. This adaptation lets these mosquitoes exploit ephemeral water habitats and spread more widely.

So why this answer fits best: it matches the biology of these genera—single eggs laid on damp surfaces that endure desiccation until conditions become wet again. Other patterns, like eggs laid in rafts that float on water, belong to different mosquito groups, and eggs that are not desiccation resistant wouldn’t tolerate dry spells the way these do.