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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

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Important Questions on Animal Diversity - I (Invertebrate Phyla)

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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 180o counterclockwise with respect to the head and foot.

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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:

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Identify the correct combinations

(A) Housefly-Labellum-Pseudotrachea

(B) Moth-Labellum-Dutton's membrane

(C) Butterfly- 1st Maxillae-Galea

(D) Tsetse fly-Rostrum-haustellum

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Identify the set of collecting and distributing blood vessels in Pheretima.
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The cells that have CD8 markers on the cell membrane are
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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

 

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Hemimetabolous insect which is nocturnal and sanguivorous is
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The class of mollusca with closed type of blood vascular system is