We don't see a crop and gizzard in many vertebrates;why do we see them in most birds?
A)Birds are more closely related to earthworms than we are and therefore did not lose this structure
B)Any animal that eats earthworms and insects needs these organs
C)Birds lack hands and teeth to reduce the size of food,and they need to gather food fast to avoid predators and competition
D)The bird "crop" and "gizzard" are really just names for the stomach and intestine and therefore other vertebrates actually have them
E)None of the choices is correct

Question

Quizplus · Accepted Answer

Birds lack hands and teeth to reduce the size of their food, and they need to gather food quickly to avoid competition and predation. The crop and gizzard help birds process their food quickly and efficiently, allowing them to digest their meals faster and therefore reduce the amount of time they need to spend feeding. This is especially important for birds that feed on insects and other prey that are small and difficult to handle.

We Don't See a Crop and Gizzard in Many Vertebrates;why