(B) In $Pheretima$ $posthuma$,the clitellum is a prominent,dark-banded,glandular region of the body wall.It is situated around the $14^{th}$,$15^{th}$

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Glandular around $14-16$ segments

(B) In $Pheretima$ $posthuma$,the clitellum is a prominent,dark-banded,glandular region of the body wall.It is situated around the $14^{th}$,$15^{th}$,and $16^{th}$ segments.This region is responsible for secreting mucus and cocoons for reproduction.Therefore,the correct description is that it is glandular and covers segments $14-16$.

Class 11 Biology Structural Organisation In Animals Anatomy of Earthworm

Easy

The clitellum of $Pheretima$ is a thick girdle that is:

A
Nonglandular around $14-16$ segments
B
Glandular around $14-16$ segments
C
Glandular around $16-18$ segments
D
Nonglandular around $16-18$ segments

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Structural Organisation In Animals

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Anatomy of Earthworm

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The clitellum of $Pheretima$ is a thick girdle that is:

Similar Questions

Identify the correct option to distinguish between the dorsal and ventral surfaces of an earthworm.Ventral surface $\quad\quad\quad$ Dorsal surface

In Earthworm,the effective organ for food digestion is

Blood from the seminal vesicles and reproductive organs is collected by the ..........

$P$ (Assertion): Earthworms have a closed type of circulatory system.$Q$ (Reason): Earthworms have hemoglobin dissolved in their blood plasma.

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Identify the correct option to distinguish between the dorsal and ventral surfaces of an earthworm.
Ventral surface $\quad\quad\quad$ Dorsal surface

$P$ (Assertion): Earthworms have a closed type of circulatory system.
$Q$ (Reason): Earthworms have hemoglobin dissolved in their blood plasma.