Which of the following factor determines the nature of the digestive tract in different vertebrates?
None of these
Availability of autotrophs
The correct option is B Feeding habits The nature of digestive tract in different vertebrates vary based on their eating habits or diet. Cows have ruminant stomach which inhabited by methanogenic bacteria. These bacteria help the cow to digest cellulose present in cell walls of plants. Human beings cannot digest cellulose as they do not possess a ruminant stomach. Dogs have a shorter digestive system as they mostly feed on stale meat.