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

question 66

Multiple Choice

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