Question

Crop and gizzard are present in the alimentary canal of:

• A. Birds
• B. Insects
• C. Mammals
• D. Reptiles

Answer 1

The correct option is A

Birds

The correct option is option A.

Explanation for correct option:

1. The alimentary canal of a bird has a muscular gizzard.
2. It is used for crushing and churning food.
3. Some birds store pebbles or stones in the gizzard to effectively churn seeds and nuts.
4. The crop is located in front of the bird's neck above the sternum.
5. It acts as a storage place for food.

Explanation for incorrect options:

Option B:

1. It is a long, muscular and tubular structure that extends from the mouth to the anus.
2. It is divided into three regions namely- foregut, midgut, and hindgut.

Option C:

1. The alimentary canal of mammals is also called the gastrointestinal tract.
2. It extends from the mouth to the anus and consists of digestive glands.

Option D:

It consists of the mouth, esophagus, stomach, and intestine, and ends in a cloaca.

Final answer: Crop and gizzard are present in the alimentary canal of birds.