What is the function of the siphon in mosquitoes?

The siphon in mosquitoes serves as an air tube for respiration. This structure is particularly important for the larval stage of mosquitoes, which spend time in water. The siphon allows larvae to access oxygen from the surface of the water while remaining submerged. This adaptation is vital for their survival as it enables them to breathe without exposing themselves to potential predators.

In contrast, a feeding tube would refer to the proboscis, which is primarily used by adult mosquitoes for feeding on nectar or blood. A tool for biting relates to the same proboscis, while a reproductive organ is not associated with breathing and instead would involve structures like the ovipositor in females. Understanding the specific role of the siphon helps clarify how mosquito larvae adapt to their aquatic environment for respiratory needs.