Which group of animals is characterized by having a relatively long cecum?

• A. Carnivores
• B. Herbivores
• C. Omnivores
• D. Insectivores

Answer: (B)

Verified step by step guidance

1. Understand the function of the cecum: The cecum is a pouch-like structure in the digestive system that plays a role in the fermentation of plant material. It houses bacteria that help break down cellulose, a major component of plant cell walls.
2. Identify the dietary habits of each group: Carnivores primarily consume meat, which is easier to digest and does not require extensive fermentation. Herbivores primarily consume plants, which contain cellulose and require fermentation for digestion. Omnivores consume both plants and meat, so their cecum is less specialized. Insectivores primarily consume insects, which do not require cellulose digestion.
3. Relate the cecum's size to diet: Animals that rely heavily on plant material for their diet, such as herbivores, tend to have a relatively long cecum to accommodate the fermentation process needed to break down cellulose.
4. Compare the groups: Carnivores and insectivores have a shorter or less developed cecum because their diets do not require extensive fermentation. Omnivores have a moderately developed cecum, while herbivores have the longest cecum due to their plant-based diet.
5. Conclude that herbivores are characterized by having a relatively long cecum, as their digestive system is adapted to process cellulose efficiently.