name of the additional chambers found in the digestive tract of birds:

The additional chambers in the digestive tract of birds are

In molluscs , the digestive tract is

Incomplete digestive tract found in -

The first enzyme to mix with food in the digestive tract is:

Which avian feature indicate reptilian ancestry ? (a) Two special chambers crop and gizzard in digestive tract (b) Eggs with calcareous shells (c) Four chambered heart (d) Scales on hind limbs