(D) In the earthworm ($Pheretima$ $posthuma$),the body is divided into segments called metameres. Each segment,except for the first,the last,and the c

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first,last,and clitellar segments

(D) In the earthworm ($Pheretima$ $posthuma$),the body is divided into segments called metameres. Each segment,except for the first,the last,and the clitellum,bears $S$-shaped structures called setae. Setae are primarily involved in locomotion. Therefore,the correct answer is $D$.

Class 11 Biology Structural Organisation In Animals Anatomy of Earthworm

Easy

Setae are present in all body segments of the earthworm except in the ..........

A
last segment
B
first segment
C
clitellar segment
D
first,last,and clitellar segments

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Class 11 Questions

Class 11

Biology Questions

Chapter

Structural Organisation In Animals

Subtopic

Anatomy of Earthworm

The approximate number of earthworms found in $1$ acre of land is..........

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How many pairs of hearts are found in earthworms (in $pairs$)?

EasyAIPMT 1991

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In earthworms,the circumpharyngeal connectives connect the . . . . . . .

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Match the following and select the correct option:

Column-$I$ Column-$II$

$P$. Testes $I$. $18^{th}$ segment

$Q$. Accessory glands $II$. $17^{th}$ and $19^{th}$ segments

$R$. Male genital pore $III$. $6^{th}$ to $9^{th}$ segments

$S$. Spermathecae $IV$. $13^{th}$ segment

$T$. Ovaries $V$. $10^{th}$ and $11^{th}$ segments

Column-$I$	Column-$II$
$P$. Testes	$I$. $18^{th}$ segment
$Q$. Accessory glands	$II$. $17^{th}$ and $19^{th}$ segments
$R$. Male genital pore	$III$. $6^{th}$ to $9^{th}$ segments
$S$. Spermathecae	$IV$. $13^{th}$ segment
$T$. Ovaries	$V$. $10^{th}$ and $11^{th}$ segments