Vertebrater
Vertebrates, or vertebrater, are animals within the subphylum Vertebrata of the phylum Chordata. They are distinguished by a vertebral column (backbone) that protects the spinal cord and provides structural support, and by a cranium that houses the brain. Most vertebrates also have an endoskeleton made of bone or cartilage.
Other defining features include a dorsal hollow nerve cord, a segmented body plan, and a high degree
Diversity and habitats: The group includes fishes, amphibians, reptiles, birds, and mammals. They inhabit a wide
Reproduction and development: Most vertebrates reproduce sexually. Fertilization can be internal or external depending on the
Evolution and classification: The vertebrate lineage arose in the early Paleozoic era from chordate ancestors. The