The clitellum of Pheretima posthuma is primar | vedclass

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(C) The clitellum is a prominent glandular and non-segmented section of the body wall in earthworms,typically found in segments $14-16$. Its primary f

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Cocoon formation

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(C) The clitellum is a prominent glandular and non-segmented section of the body wall in earthworms,typically found in segments $14-16$. Its primary function is the secretion of mucus and albumin,which are essential for the formation of a cocoon. During the reproductive process,the clitellum secretes a mucous tube that hardens to form a cocoon,within which fertilization and development of the embryos occur.

Column-$I$	Column-$II$
$P$. Septal nephridia	$I$. Enteronephric
$Q$. Integumentary nephridia	$II$. Exonephric
$R$. Pharyngeal nephridia

The clitellum of $Pheretima$ $posthuma$ is primarily associated with which of the following?

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Pharyngeal and septal nephridia open into the alimentary canal and are of the enteronephric type. This is an adaptation for:

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The blood of $Pheretima$ is:

In which segments is the clitellum present in an earthworm?

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

Column-$I$ Column-$II$

$P$. Septal nephridia $I$. Enteronephric

$Q$. Integumentary nephridia $II$. Exonephric

$R$. Pharyngeal nephridia

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