Correct option is B
The hypostome is a hairpin-like structure in ticks that helps anchor and stabilize the tick's mouthparts to the host's skin. It is crucial for feeding as it facilitates the exchange of fluids, such as blood, between the tick and its host.
It is found in Ixodidae (hard ticks), and the backward-facing barbs on the hypostome make it challenging for the tick to detach once it is embedded in the host's skin.
The hypostome plays a vital role in fluid exchange, allowing the tick to ingest blood and transfer saliva, which may contain pathogens.
The hypostome's shape and structure vary slightly among different tick species, but all serve the purpose of anchoring the tick securely to the host.
Additional Information:
Substratum: Refers to the surface or material on which an organism lives or grows, such as the surface on which ticks might be found.
Peduncle: A stalk-like structure in plants or animals.
Trunk: Refers to the main body segment of animals or the stem of plants.