In earthworm, the common prostate and spermatic duct / vasa deferentia open to the ___________ by a pair of ___________ genital pore on the ventro-lateral side of the ______________ segment.

Options

A. Exterior, male, 16th
B. Exterior female, 16th
C. Exterior, male, 18th
D. Exterior, female, 18th

Answer

To answer the question regarding the reproductive system of earthworms, we need to fill in the blanks in the provided statement:

"In earthworm, the common prostate and spermatic duct/vasa deferentia open to the ___________ by a pair of ___________ genital pore on the ventro-lateral side of the ______________ segment."

Step 1: Identify where the common prostate and spermatic duct open.
- In earthworms, the common prostate and spermatic duct open to the **cloaca**.

Step 2: Identify the type of genital pore.
- The genital pore through which the common prostate and spermatic duct open is referred to as **male** genital pore.

Step 3: Identify the segment where the genital pore is located.
- The male genital pores are located on the ventro-lateral side of the **15th** segment of the earthworm.

Combining all the information, the completed statement is:
"In earthworm, the common prostate and spermatic duct/vasa deferentia open to the **cloaca** by a pair of **male** genital pore on the ventro-lateral side of the **15th** segment."