Which term describes animals that have backbones?

Which term describes animals that have backbones?

• A. Vertebrates
• B. Invertebrates
• C. Dam
• D. Atom

Answer: (A)

Animals with backbones are vertebrates. The backbone, or vertebral column, is a flexible rod of bones or cartilage that supports the body and protects the spinal cord. This feature distinguishes vertebrates from invertebrates, which are animals without a backbone. Vertebrates include groups like fish, birds, mammals, reptiles, and amphibians, showing a wide range of forms but sharing that backbone. The other terms don’t describe a group of animals—one is a word for a female parent of an animal, and the other is a basic unit of matter.

Animals with backbones are vertebrates. The backbone, or vertebral column, is a flexible rod of bones or cartilage that supports the body and protects the spinal cord. This feature distinguishes vertebrates from invertebrates, which are animals without a backbone. Vertebrates include groups like fish, birds, mammals, reptiles, and amphibians, showing a wide range of forms but sharing that backbone. The other terms don’t describe a group of animals—one is a word for a female parent of an animal, and the other is a basic unit of matter.