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Question

Choose the wrongly matched pair regarding the position of reproductive structures in earthworm.

  1. Testes - 10th and 11th segments
  2. Male genital pore - 9th segment
  3. Spermathecae - 6th to 9th segments
  4. Ovaries - Inter segmental septum of 12th and 13th

A
Testes - 10th and 11th segments
B
Male genital pore - 9th segment
C
Spermathecae - 6th to 9th segments
D
Ovaries - Inter segmental septum of 12th and 13th
Solution
Verified by Toppr

1. Testes are in two pairs, white and lobed, located in 10th and 11th segment.
2. Spermathecae are in 4 pairs in each of 6th, 7th, 8th, 9th segment and they store spermatozoa during copulation.
3. Male genital pore is found in one pair located in 18th segment. Sperm produced in the testes is pass out through male genital pore.
4. A pair of small, whitish and lobulated ovaries are located in inter segmental septum of 12th and 13th segments, on either side of ventral nerve cord.
So, the correct option is 'Male genital pore - 9th segment'.

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