DENDROLOGY

Detailed explanation-1: -The 5 groups of vertebrates (animals that have a backbone) are fish, amphibians, reptiles, birds, and mammals. Invertebrates are animals that do not have a backbone. A spider is an invertebrate because it is an animal without a backbone.

Detailed explanation-2: -vertebrate, also called Craniata, any animal of the subphylum Vertebrata, the predominant subphylum of the phylum Chordata. They have backbones, from which they derive their name.

Detailed explanation-3: -Most animals have a backbone that is made of bones joined together to form a skeleton. is called a vertebra.