Question

Identify the correct pathway of food ingested by an earthworm.

(a) Mouth→Pharynx→Esophagus→Gizzard

(b) Mouth→Esophagus→Pharynx→Gizzard

(c) Mouth→Esophagus→Gizzard→Pharynx

(d) Mouth→Pharynx→Gizzard→Esophagus

I have been asked this question in an internship interview.

My question is from Animals Structural Organisations in division Structural Organisations in Animals of Biology – Class 11

Answer 1

Right option is (a) Mouth→Pharynx→Esophagus→Gizzard

To explain I would say: Food is ingested by the earthworm through the mouth. The mouth part opens up into the muscular pharynx. This is followed by a narrow esophagus followed by the gizzard where food is broken down by the process of grinding.