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Structural Organisation in Animals question

2011 · Q44
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Structural Organisation in Animals question

2011 · Q44

NEETBiologyStructural Organisation in AnimalsMCQ+4 / −1
One very special feature in the earthworm pheretima is that :
  1. A
    The S-shaped state embedded in the integument are the defensive weapons used against the enemies
  2. B
    It has a long dorsal tubular heart
  3. C
    The typhlosole greatly increases the effective absorption area of the digested food in the intestine
  4. D
    Fertilisation of eggs occurs inside the body
View written solutionFree

Correct answer: C

The intestine of an earthworm has a peculiar fold of tissue that forms a pocket in the intestine that is visible when viewing a cross section. This space, which runs almost the whole length of the body dorsally is known as the typhlosole and it serves to increase the surface area of the intestine for absorption.

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