Difficulty: Easy
Correct Answer: Dog
Explanation:
Introduction / Context:Animal classification can use digestive physiology. Cattle, sheep, and goats are ruminants with multi-chambered stomachs for fermenting plant matter. Dogs are non-ruminants (carnivores/omnivores) and differ sharply in diet and digestion.
Given Data / Assumptions:
Concept / Approach:Group by rumination (cud-chewing) apparatus. Ruminants share a foregut fermentation system and characteristic grazing diet; dogs do not.
Step-by-Step Solution:
1) Label cow/sheep/goat → ruminants.2) Label dog → non-ruminant.3) Dog is the only non-ruminant → odd one out.Verification / Alternative check:Consider dentition and diet: canines vs specialized molars for grinding fibrous plants.
Why Other Options Are Wrong:They share ruminant biology and herbivory.
Common Pitfalls:Do not use “pet vs livestock” because goats can also be kept as pets; physiology is the firmer criterion.
Final Answer:Dog
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