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
Amphibians and arthropods represent two different groups of animals. Amphibians are a class of vertebrates, which means they have a backbone and an internal skeleton. Arthropods are a phylum of animals that encompass a large group of different organisms that have no backbone. ...
Invertebrates areanimals without a backbone or bony skeleton. They range in size from microscopic mites and almost invisible flies to giant squid with soccer-ball-size eyes. This is by far the largest group in the animal kingdom: 97 percent of all animals are invertebrates. Do all mammals ha...
PhylumChordata-Chordates Internalskeletonwithmuscleattachmentsonoutersurface Allowsforgreaterrangeofmovementanddevelopmentoflarge bodysize Segmentedbodyplan Allchordateshave (inembryooradult) notochord dorsalnervetube post-analtail pharyngealgillslits Hollowdorsalnervetube-justbelowdorsalsurface differentiatesintobrainand...
(Frogs,Toads) Characteristics •Bonyskeleton,varying#sofvertebrae,ribspresentorabsent,notochord doesnotpersist,noexoskeleton •Usuallytetrapods,somelegless,webbedfeetoftenpresent,notrueclaws ornails •Smooth,moistskinwithglands(somepoisonous),chromatophores,no scalesexceptforsomeconcealeddermalforms •Small...