(C) Earthworms are known as the 'friends of farmers'.They burrow into the soil,which makes the soil porous and loose.This process,known as vermiculati

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(C) Earthworms are known as the 'friends of farmers'.They burrow into the soil,which makes the soil porous and loose.This process,known as vermiculation,helps in the respiration and penetration of developing plant roots.Additionally,they increase the fertility of the soil by producing vermicompost.

Class 11 Biology Structural Organisation In Animals Anatomy of Earthworm

Easy

Earthworms help farmers by

A
Destroying harmful bacteria
B
Destroying harmful insects
C
Making soil porous and loose
D
Both $(a)$ and $(b)$

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Chapter

Structural Organisation In Animals

Subtopic

Anatomy of Earthworm

Match the following columns regarding the types of nephridia in earthworms:

Column-$I$ Column-$II$

$P$. Septal nephridia $I$. $15^{th}$ segment to the last segment

$Q$. Integumentary nephridia $II$. $4^{th}, 5^{th}$ and $6^{th}$ segments

$R$. Pharyngeal nephridia $III$. $3^{rd}$ segment to the last segment

Column-$I$	Column-$II$
$P$. Septal nephridia	$I$. $15^{th}$ segment to the last segment
$Q$. Integumentary nephridia	$II$. $4^{th}, 5^{th}$ and $6^{th}$ segments
$R$. Pharyngeal nephridia	$III$. $3^{rd}$ segment to the last segment