Which statement about adult mosquitoes is true?

• A. Females cannot survive more than a week.
• B. Most active during dusk and dawn.
• C. Only females bite humans.
• D. Females do not feed on nectar.

Answer: (B)

Adult mosquitoes are typically most active during the crepuscular periods of dawn and dusk because cooler temperatures and higher humidity make it easier for them to fly and feed, and host activity is often higher at those times. This combination increases the chances of finding a host and mating, so the observation that they’re most active at dusk and dawn reflects real mosquito behavior.

Other statements don’t fit: females can live longer than a week in suitable conditions, sometimes several weeks. Male mosquitoes don’t bite at all, and females bite a variety of hosts, not just humans. Both sexes, especially females, rely on nectar for sugar energy, with the blood meal needed for egg development, so a claim that females do not feed on nectar isn’t correct.