alleryStart learning →What challenge does a bird's digestive system have to overcome?
AIt cannot absorb any water at all
BIt has no stomach of any kind
CIt produces no digestive enzymes
DIt must process unchewed food
Answer & Solution
Correct answer: D. It must process unchewed food
1. Birds have no teeth, so they cannot chew food before swallowing it.
2. Their digestive system must therefore handle food that arrives unmasticated.
3. The gizzard takes over the grinding job that teeth do in other animals.
4. Their beaks vary widely to suit diets from seeds and insects to fruits and nuts.
_Source: OpenStax Biology 1e (CC BY 4.0), Ch 34 "Animal Nutrition and the Digestive System", section Avian_
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