answersLogoWhite

0

The primary feature that determines whether an animal is a vertebrate or an invertebrate is the presence of a backbone or spinal column. Vertebrates, which include animals like mammals, birds, reptiles, amphibians, and fish, possess a bony or cartilaginous spine. In contrast, invertebrates, such as insects, mollusks, and crustaceans, lack a backbone and make up the majority of animal species on Earth. This distinction is fundamental in classifying animals within the animal kingdom.

User Avatar

AnswerBot

1mo ago

What else can I help you with?