Term for animals with multiple compartments and one true stomach.

Term for animals with multiple compartments and one true stomach.

• A. Ruminant
• B. Monogastric
• C. Nonruminant
• D. Omnivore

Answer: (A)

Animals with a multi-chambered foregut stomach are ruminants. Their stomach is divided into four compartments—rumen, reticulum, omasum, and abomasum—where the first three handle microbial fermentation of fibrous plant material, and the abomasum acts as the true stomach where acid and enzymes digest the material. This combination of foregut fermentation plus a true stomach is what defines ruminants, and it explains why cud-chewing, microbial digestion, and a distinct abomasum are characteristic features. The other terms don’t fit as precisely. A single-chambered stomach corresponds to monogastric animals. Saying “nonruminant” is less specific here, since it’s not a standard descriptive category for stomach anatomy. An omnivore describes diet, not stomach structure, and many omnivores have simple stomachs.

Animals with a multi-chambered foregut stomach are ruminants. Their stomach is divided into four compartments—rumen, reticulum, omasum, and abomasum—where the first three handle microbial fermentation of fibrous plant material, and the abomasum acts as the true stomach where acid and enzymes digest the material. This combination of foregut fermentation plus a true stomach is what defines ruminants, and it explains why cud-chewing, microbial digestion, and a distinct abomasum are characteristic features.

The other terms don’t fit as precisely. A single-chambered stomach corresponds to monogastric animals. Saying “nonruminant” is less specific here, since it’s not a standard descriptive category for stomach anatomy. An omnivore describes diet, not stomach structure, and many omnivores have simple stomachs.