First slide

Earthworm

Question

Which one of the following correctly describes the location of some body parts in the earthworm Pheretima?

Moderate

A

Two pairs of testes in 11th and 12th segments
B

One pair of ovaries attached to the intersegmental septum of 12th and 13th segments
C

Three pairs of spermathecae in 5th to 7th segments
D

Two pairs of prostate glands in 17th and 19th segments

Solution

One pair of ovaries attached to the intersegmental septum of 12th and 13th segments. Testes are present in 10th and 11th segments (not 11th and 12th). Spermathecae are four pairs in number (6th to 9th segments). Prostate glands are one pair in number and extend from 16th or 17th segment to 20th or 21st segment.

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