Question

Which out of the following is the correct set of external apertures present in female Ascaris?

• A. Mouth, excretory pore and anus
• B. Mouth, excretory pore and cloacal aperture
• C. Mouth, excretory pore, anus and gonopore
• D. Mouth, excretory pore and gonopore

Answer 1

The correct option is C Mouth, excretory pore, anus and gonopore

The excretory pore in female Ascaris is situated mid-ventrally, a little behind the mouth. In females, the genital pore and anus open separately, the genital pore or gonopore is situated mid-ventrally at about one-third distance from the anterior end. A little in front of the tail end lies a mid-ventral transverse aperture or anus, guarded by thick lips. Only digestive tube opens to the outside through anus. Thus, the correct answer is option C.