In the transverse section of Pheretima, identify the correct sequence of body wall layers from outer to inner side.
(A) Circular muscles
(B) Parietal peritoneum
(C) Epidermis
(D) Cuticle
(E) Longitudinal muscles
Important Questions on Animal Diversity - I (Invertebrate Phyla)
Statement: In gastropods, due to torsion mantle cavity is placed anteriorly behind and above the head.
Reason: During the larval stage, visceral mass, shell and mantle cavity are twisted upto counterclockwise with respect to the head and foot.
Match the correct pairs in List-I and List-II with reference to Pheretima.
| List-I | List-II | ||
| (A) | Pharyngeal nephridia | (I) | 14th segment |
| (B) | Stomach | (II) | 18th segment |
| (C) | Anterior loops | (III) | 9th to 14th segments |
| (D) | Male genital apertures | (IV) | 4th, 5th and 6th segments |
| (V) | 10th and 11th segments |
The correct match is:
Identify the correct combinations
(A) Housefly-Labellum-Pseudotrachea
(B) Moth-Labellum-Dutton's membrane
(C) Butterfly- 1st Maxillae-Galea
(D) Tsetse fly-Rostrum-haustellum
Study the following and choose the correct one.
| List-I (Animal) | List-II (Character) | List-III (Class) | |
| I. | Sea urchin | Aristotle's Lantern | Echinoidea |
| II. | Sea cucumber | Respiratory trees | Holothuroidea |
| III. | Sea biscuit | Anus is absent | Asteroidea |
| IV. | Sea stars | Pedicellaria with two jaws | Ophiuroidea |
