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Wings are vestigial in which type of cockroaches?
(a)Female Blatta orientalis
(b)Male Blatta orientalis
(c)Male Periplanata americana
(d)Female Periplanata americana

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Important Questions on Invertebrate Phyla
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Study the following and find the correct combinations related to Arthropoda
Subphylum / Class | Character | Example | |||
(i) | Arachnida | (a) | Extinct marine arthropods | (p) | Julus |
(ii) | Crustacea | (b) | Gnathochilarium | (q) | Dalmanites |
(iii) | Chilopoda | (c) | Poison claws | (r) | Araneae |
(iv) | Diplopoda | (d) | Biramous thoracic and abdominal appendages | (s) | Scolopendra |
(v) | Trilobita | (e) | Spinnerets | (t) | Cancer |

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Study the following statements
A) Corallium rubrum is the precious red stone coral that belongs to Scyphozoa
B) Renette gland is an excretory gland found in round worms
C) Tubifex is an aquatic annelid
D) In chilopods, maxillae are modified into gnathochilarium
Among the above, the incorrect statements are

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Aristotle's lantern is found in echinoids
Glochidium is the larva of cephalopods
Scorpions respire with book lungs.
Parapodia are found in oligochaetes

MEDIUM
Match the following
List - I | List - II | ||
(a) | Crab | (i) | Green glands |
(b) | Dugesia | (ii) | Malpighian tubules |
(c) | Wuchereria | (iii) | Renette glands |
(d) | Scolopendra | (iv) | Flame cells |
The correct answer is

MEDIUM
Match the following columns and select the correct option.
Column-I | Column-II | ||
(a) | Gregarious, polyphagous pest | (i) | Asterias |
(b) | Adult with radial symmetry and larva with bilateral symmetry | (ii) | Scorpion |
(c) | Book lungs | (iii) | Ctenoplana |
(d) | Bioluminescence | (iv) | Locusta |

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I. Contraction of the dorsal longitudinal muscles elevates the wings in the cockroach.
II. Rectal papillae help in water conservation in cockroaches.
III. The second chamber of the heart from the anterior part lies in the metathorax of the cockroach.
IV. Inner cuticular lining of the trachea of the cockroach is called the intima.

HARD
(i) In male cockroach, genital pouch or chamber lies at the hind end of abdomen bounded dorsally by and terga and ventrally by the sternum.
(ii) In cockroaches, the haemolymph is composed of colourless plasma and haemocytes.
(iii) In a female cockroach each ovary is formed of a group of ten ovarian tubules or ovarioles, containing a chain of developing ova.
(iv) In cockroach the nymph grows by moulting about times to reach the adult form.
(i) | ||||
(ii) | ||||
(iii) | ||||
(iv) |


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