Vocabulary — Choose the closest synonym to the given word Word: vertebrate

Introduction / Context:“Vertebrate” is a biological classification word. The test checks whether you know the defining characteristic behind the term rather than confusing it with one subgroup of animals or its opposite category.

Given Data / Assumptions:

• Target word: vertebrate.
• Options: animal with a backbone, invertebrate, reptile, mammal.
• We want the definition-level synonym that works across contexts.

Concept / Approach:

• A vertebrate is any animal possessing a vertebral column (backbone). The class includes fishes, amphibians, reptiles, birds, and mammals.
• Therefore, the most accurate paraphrase is “animal with a backbone.”

Step-by-Step Solution:

Verification / Alternative check:

Why Other Options Are Wrong:

Common Pitfalls:

Final Answer: