Question

Choose the type of mouthparts of insects in which the two labella are interconnected by Dutton's membrane.
A) Piercing and sucking type
B) Sponging type
C) Siphoning
D) frog and chewing type

Answer 1

Hint: One on either side of the head, a chewing insect has a pair of mandibles. The mandibles are located posterior to the maxillae and caudal to the labrum. The mandibles are a chewing insect's largest and most durable mouthparts, which it uses to masticate, cut, break, crush, and chew food.

Complete answer:
Mouthparts in insects are adapted in a variety of ways to satisfy the needs of their feeding habits. Cockroaches, grasshoppers, Dragonflies, and beetles have the most primitive biting and chewing mouth bits. Mosquito larvae, houseflies, butterflies, and honeybee larvae have biting and chewing mouth bits. Female mosquitoes, bedbugs, the head louse, tsetse fly, and Lac insects are piercing and sucking forms.

Male mosquito, sucking sort Housefly is a sucking and sponging sort of fly. The butterfly is a syphoning kind. Female mosquitoes feed on the blood of vertebrates.

A) The piercing and sucking mouth sections are the most common. The lower lip, or labium, is altered to form an elongated proboscis. Labelle is the sensory lobes at the tip of the proboscis that is bound by Dutton's membrane.

B) Sponging type- The function of this type of mouth is to absorb liquid. In this, the labium is elbowed in shape and has a fleshy appearance. It is found in flies.
C) Siphoning- This insect's mouth is adapted for sucking liquid like blood or nectar from the flowers. They have a long proboscis which is formed by the pair of maxillae. They lack mandibles. Examples of such insects include female mosquitos.
D) Frog and chewing type- This type is found in grasshoppers. It consists of the labrum or the upper lip, mandibles, maxillae or the lower lip, hypopharynx and epipharynx. It is the most primitive kind of mouth structure.

Note: The mouth of a mosquito, also known as a proboscis, is more than just a single tiny spear. It's a complex system of six small, needle-like mouthparts known as stylets that pierce the skin, locate blood vessels, and make it easy for mosquitoes to suck blood. These bugs even know where to bite.