Which statement best describes a common feature of mosquito larvae?

• A. They feed only at night
• B. They have air tubes
• C. They are predators
• D. They have external gills

Answer: (B)

Mosquito larvae live in water and must access atmospheric air while staying submerged. A common feature they share is the presence of air tubes (breathing siphons) that extend to the water surface so the larva can draw in oxygen from the air. This adaptation lets them stay in the water column and breathe without having to come completely out of the water. They do not rely on external gills for respiration, and while their feeding habits vary, they are not defined by nocturnal feeding or by being predators. The air tubes are the distinctive, widespread trait that fits best.