Question:

Mouth parts of Housefly are of :

Updated On: Jul 28, 2022
  • sponging and sucking type
  • piercing type
  • laping and chewing type.
  • siphoning type
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The Correct Option is A

Solution and Explanation

The housefly belongs to the family Diptera. The flies of this group have chemosensilla as receptors on the tarsi. These receptors help in sensing the presence of sugar or carbohydrates in liquid or dried form. The labium being articulate and possessing at its end a sponge-like labellum. There are paired mandibles and maxillae are present. After sensing the presence of food, the insects secrete viscous liquid as saliva. This saliva and the atmospheric water helps the sugar to get dissolved and get converted in the liquid form. The liquid is then soaked and sucked with the help of the mouth parts. The food enters the labellum through minute channels. The food moves from the mouth to oesophagus.
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Concepts Used:

Classification of Animals

Classification of Animal Kingdom:

One of the most fundamental forms of classification of animals is the presence or absence of the notochord. Hence, two major groups exist, namely: Chordates and Non-chordates

Non-chordates and the Chordates-

  • The notochord is a flexible rod made out of a material similar to cartilage. If an animal has a notochord during any stage of its life, it is classified as a chordate. Contrary to popular belief, chordates do not exclusively include vertebrates.
  • There are invertebrates that possess a notochord during some point in their lives and hence, are classified as chordates. Thus all vertebrates are chordates but not all chordates are vertebrates.

Non-chordates-

  • Non-chordates are animals without a notochord – the rod-like elastic structure that supports the body. This phylum consists of a small group of worm-like, marine species with an organ-system level of organization.
  • Members of phylum Porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata and Hemichordata fall under Non-chordates

Vertebrates Classification:

The subphylum Vertebrata is divided into five classes of vertebrates. These five classes of vertebrates comprise of all the species of animals and have developed vertebral column as well as an internal skeleton.

Other characteristic features of vertebrates are-

  • Presence of a true vertebral column and internal skeleton with muscle attachment points for body movement.
  • A front-side muscular heart with two, three or four chambers.
  • Kidneys for excretion and osmoregulation
  • A paired appendages which may be fins or limbs.
  • Possess notochord during the embryonic stage.
  • Vertebrates are the only chordates to possess a brain as a part of the central nervous system.

Classification of Vertebrates-

  • Pisces
  • Amphibia
  • Reptilia
  • Aves
  • Mammalia