In vertebrates, the notochord is present during embryonic development, at which time it induces the development of the neural tube which serves as a support for the developing embryonic body. The notochord, however, is replaced by the vertebral column (spine) in most adult vertebrates. General characteristics of vertebrates. shovel-shaped head, fleshy tail, external gills) in adult forms (paedomorphic) - the result is a sexually mature individual with many other body parts in the larval or juvenile condition (neoteny) Order Salientia (Anura) - frogs and toads.
Jun 12, · Knowing the five classes of vertebrates and their characteristics helps you to understand more about these animals. The five classes of vertebrates are listed below. and an adult stage. This is unique in the vertebrate world, because fish, reptiles, birds, and mammals are all born as small versions of the adult, not a completely different. The major groups of vertebrates include fishes, amphibians, reptiles, birds, and mammals. Encyclopædia Britannica, Inc. How many of you remember the Brady Bunch episode in which Peter was studying for a biology test? He asked Marcia for help, and she taught him the mnemonic: “A vertebrate has a back that’s straight.”.