Which of the following are paired ventro-lateral openings in the intersegmental grooves of Pheretima?

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Male genital openings

Spermathecal openings

Nephridiopores

Female genital openings

answer is B.

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Detailed Solution

Paired ventro-lateral openings in the intersegmental grooves of Pheretima are spermathecal openings. They receive the spermatozoa from other other worm during copulation and stored them.Male genital openings are paired ventro-lateral openings of 18th segment but not seen in the intersegmental grooves.Nephridiopores are the irregular openings on the surface of every segment from 3rd to last segments.Female genital opening is single and found on the ventral side of 14th segment.

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