What is the function of the siphon in mosquitoes?

The siphon in mosquitoes serves as an air tube for respiration. This specialized structure allows mosquito larvae to breathe. Positioned near the surface of the water, the siphon enables the larvae to intake oxygen while remaining submerged. This adaptation is crucial for their survival, as they rely on this respiratory system to access oxygen in aquatic environments.

In contrast, other functions described in the options do not accurately represent the purpose of the siphon. For example, a feeding tube typically refers to the proboscis, which is distinct from the siphon and is used by adult mosquitoes for feeding on nectar or blood. A tool for biting would also refer to the mouthparts of the adult mosquito, not the siphon. Furthermore, while mosquitoes do reproduce, the siphon itself is not a reproductive organ; rather, it is essential for the larval stage’s breathing, highlighting its role in the life cycle of mosquitoes.