In earthworm,genital papillae occur in segments
- A$16$ and $17$
- B$16$ and $18$
- C$17$ and $19$
- D$17$ and $18$
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The chloragogen cells of $Pheretima$ perform a function similar to which organ in vertebrates?
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View SolutionChoose the correct pair regarding the anatomy of an earthworm:
Column-$I$ Column-$II$ $1$. Spermathecae $a$. $6^{th}$ to $9^{th}$ segments $2$. Typhlosole $b$. $1^{st}$ to $3^{rd}$ segments $3$. Buccal cavity $c$. $26^{th}$ to $35^{th}$ segments in intestine $4$. Pharyngeal nephridia $d$. $4^{th}$ to $6^{th}$ segment
| Column-$I$ | Column-$II$ |
| $1$. Spermathecae | $a$. $6^{th}$ to $9^{th}$ segments |
| $2$. Typhlosole | $b$. $1^{st}$ to $3^{rd}$ segments |
| $3$. Buccal cavity | $c$. $26^{th}$ to $35^{th}$ segments in intestine |
| $4$. Pharyngeal nephridia | $d$. $4^{th}$ to $6^{th}$ segment |
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View SolutionGive scientific reasons: Earthworm is known as the farmer's friend.
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