The body of a cockroach is dorso-ventrally flattened and is covered in a hard, brown chitinous exoskeleton. Presence of a boat-shaped sternum on the 9th abdominal segment. 3. Midgut- It is also known as mesenteron or ventriculus. Which among the following is incorrect regarding the vision of cockroach? P. australasiae can be recognized by a yellow band across the base of the pronotum and yellow slashes along the base of the forewings. The forewings are mesothoracic and are called wing covers or tegmina or elytra. In the case of cockroach, forewings are not used for the flight because they are thick, opaque and leathery, they only cover the hind wings and protects them. Forewings (mesothoracic) called tegmina are opaque dark and leathery and cover the hind wings when at rest. The apical tarsomere bears a terminal structure called pretarsus, which includes a hook-like claw on each side of a median broad and setae bearing adhesive pad called arolium. Ans. (4) They cover hindwings when at rest. Tegmina, generally being stiffer than the rear wings, are used as sound boards by many species of insects, especially Orthoptera; in many locusts they make a crackling noise in flight, and in many crickets, tree crickets, and even mole crickets, the tegmina have undergone marked anatomical adaptations, often asymmetric, for sound production. How the wings are displayed when in a natural resting position varies between species. info). Cockroaches are 34-53mm long with wings that extend beyond the tip of the abdomen in males. These are thick, opaque and leathery but do not help in flight. Cockroaches belong to the class Insecta of phylum Arthropoda.The scientific name of cockroach is Periplaneta americana. Also in public buildings and domestic premises eg apartment blocks. In each segment, the exoskeleton has sclerites, which are joined to each other by a thin, flexible, articular membrane called the arthrodial membrane. ... Also called mesothoracic wings or tegmina Opaque, dark and leathery Cover the hind wings when at rest Used in flight Answer : D Solution : Forewings are not used in flight. Moths have one pair of forewings and a smaller pair of hindwings. Match the structure (i), (ii), (iii), (iv) with their correct location respectively: Which among the following statements are incorrect about cockroach? Cockroaches are common in commercial premises associated with the production or handling of food. Which among the following statements with respect to forewings of cockroach is incorrect? Presence of caudal styles. The body of a cockroach is dorso-ventrally flattened and is covered in a hard, brown chitinous exoskeleton. NEET 2021 - Achiever Batch - Aryan Raj Singh, Strategies for Enhancement in Food Production, Classification of Elements and Periodicity, Organic Chemistry - Some Basic Principles And Techniques, General Principles and Processes of Isolation of Elements, Differentiations & Conversions - Organic Chemistry, Systems of Particles and Rotational Motion, Crack NEET with Online Course - Free Trial, S-15, 2nd floor Uphar Cinema Market, above Red Chilli Restaurant, Green Park Extension, New Delhi, 110016. Infection in humans by the intestinal protozoan of cockroaches and termites called Lophomonas blattarum has been diagnosed in respiratory infections of children aged 2–5 years contaminated orally or by air, with cysts or trophozoites contained in the feces of the cockroach Periplaneta americana. (3) Tracheoles carry oxygen from air to all other body parts. The abdomen in both males and females consists of 10 segments. Many moths conceal their hindwings by folding back their forewings and only reveal them when either disturbed or preparing to fly (1 and 2 above – Eyed Hawk-moth; 3 and 4 above – Cream-spot Tiger). They have a … P. australasiae can be recognized by a yellow band across the base of the pronotum and yellow slashes along the base of the forewings. Join now. Roaches have two forewings and two hind wings. (1) It has mosaic vision with high sensitivity and less resolution. So, the correct answer is 'Fore wings are used for flight'. The first pair of wings arise from mesothorax and the second pair from metathorax. NEET Zoology Structural Organisation in Animals questions & solutions with PDF and difficulty level They are only found in the suborder Heteroptera; the wings of the Homoptera, such as the cicada, are typically entirely membranous. 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