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

1. Four pairs of spermathecae in 4 - 7 segments.
2. One pair of ovaries attached at intersegmental septum of 14th and 15th segments.
3. Two pairs of testes in 10th and 11th segments.
4. Two pairs of accessory glands in 16 - 18 segments.

Correct answer: Two pairs of testes in 10th and 11th segments.

Solution

In Pheretima, the testes occur as two pairs in the 10th and 11th segments, which is a standard identifying feature. The other options misplace spermathecae, ovaries, or accessory glands relative to their known segmental locations.

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