Question

Choose the correct combination of labelling from the options given.

• A. A- Testis, B- Spermatheca, C- Seminal vesicle, D- Ovary, E- Vas deferens, F- Accessory gland
• B. A- Spermatheca, B- Testis, C- Ovary, D- Oviduct, E- Vas deferens, F- Accessory gland
• C. A- Spermatheca, B- Testis, C- Seminal vesicle, D- Ovary, E- Vas deferens, F- Accessory gland
• D. A- Spermatheca, B- Testis, C- Accessory gland, D- Ovary, E- Vas deferens, F- Seminal vesicle
• E. A- Spermatheca, B- Ovary, C- Seminal vesicle, D- Testis, E- Vas deferens, F- Accessory gland

Answer 1

The correct option is B A- Spermatheca, B- Testis, C- Ovary, D- Oviduct, E- Vas deferens, F- Accessory gland

• There are four pairs of flask-shaped spermatheca (A) situated in $6^{th},7^{th},8^{th}$ and $9^{th}$ segments.
• The earthworm contains two pairs of testes (B), one pair in the ${10}^{th}$ and the other pair in 11th segments found attached to the posterior surface of 9/10 and 10/11 intersegmental septa.
• A pair of ovaries (C) remain attached to the posterior face of septum 12/13 one on either side of the nerve cord. They are found in ${13}^{th}$ segment.
• The oviduct (D) is the tube that helps in the transfer of eggs.
• Each spermiducal funnel leads into a slender, internally ciliated sperm duct or vas deferens (E). The two vasa deferentia of each side run close together along the ventral body wall on either side of the nerve cord from ${12}^{th}$ to ${18}^{th}$ segment. In ${18}^{th}$ segment, they join a thick prostatic duct.
• Earthworm contains two pairs of accessory glands (F), one pair in ${17}^{th}$ segment and another pair in ${19}^{th}$ segment on the ventral body wall at the lateral sides of the nerve cord.

Thus, the correct answer is option B.