Question

In male Ascaris, genital pore and anus:

• A. Open through small pores present on the integument
• B. Open into genital atrium
• C. Open separately
• D. Open into cloaca

Answer 1

The correct option is D Open into cloaca

Reproductive system of Ascaris:

Sexes are separate, readily distinguishable by the tail and cloaca.
Male reproductive organs are testis, vas deferens, seminal vesicle, ejaculatory duct and penial setae.

The testis is a long, thread-like, coiled tube that continues distally into a short and thick vas deferens.

The vas deferens joins posteriorly with a straight tube called seminal vesicle, which narrows at its posterior end to form a short but muscular ejaculatory duct which opens into the cloaca.

Dorsal to the cloaca is a pair of penial sacs that contain a pair of spicules or penial setae, which serve in copulation.

Thus, the correct answer is option D.