What adaptations do herbivores receive for their diet?

• A. Complex and long intestines and large cecum
• B. Short intestines
• C. Small stomach
• D. No cecum

Answer: (A)

Herbivores rely on microbes in their gut to break down the tough cellulose found in plant material. That microbial fermentation happens best when the digestive tract is long and complex, giving microbes more time and surface area to work and allowing the animal to absorb the resulting fatty acids for energy. A large cecum (and, in some herbivores, a multi-chambered stomach) serves as a dedicated fermentation chamber, enabling efficient fiber digestion.

Short intestines, a small stomach, or lacking a cecum would limit the capacity for this microbial fermentation and fiber breakdown, making it harder for herbivores to extract energy from plants.