What are the seven classes of vertebrates?

Answer 1

The seven classes of Vertebrates are as follows:

Agnatha:

It consists of jaw-less fish that do not have scales. These are the lampreys and hagfish.

Chondrichthyes:

Fish that have skeletons consisting of hard rubber-like cartilage rather than bone. These are the sharks and rays.

Osteichthyes:

All of the bony fish. Tuna, bass, salmon, and trout.

Amphibia:

spend part of their lives under water and part on land. Frogs, toads, and salamanders are amphibians. Many of these species must keep their skin moist by periodically returning to wet areas. All of them must return to water in order to reproduce since their eggs would dry out otherwise. They start life with gills, like fish, and later develop lungs to breathe air.

Reptilia:

includes turtles, snakes, lizards, alligators, and other large reptiles. All of them have lungs to breathe on land and skin that does not need to be kept wet. They produce an amniote egg which usually has a leather hard shell that protects the embryo from drying out. This is an advantage over fish and amphibians because the amniote egg can be laid on land where it is usually safer from predators than it would be in lakes, rivers, and oceans.

Aves:

includes all the birds. They also produce amniote eggs but usually give them greater protection from predators by laying them high off of the ground or in other relatively inaccessible locations. In the case of both reptiles and birds, the eggs are fertilized within the reproductive tract of females.

Mammalia:

Dogs, cats, bears, humans and most other large animals today are members of the vertebrate class Mammalia . All mammals conceive their young within the reproductive tract of the mother and, after birth, nourish them with milk produced by their mammary gland. Mammals are heterodonts with strong jaws. That is to say, they have a variety of specialized teeth (incisors, canines, premolars, and molars). This allows them to chew their food into small pieces. Many reptiles must swallow their prey whole, which limits them to hunting smaller animals.

Answer 2

Last time I looked, it was : Fish, Amphibians, Reptiles, Birds, Mammals and Monotremes. These are listed in the presumed order of evolution, the last two having done so at pretty much the same time. If you're not a fan of Darwin, then I suppose the Almighty made them in whatever order seemed best.

Answer 3

Fish used to be broken down by Jawless Fish, Cartiage Fish, Boney Fish, Amphbians, Reptiles, Aves, and Mammals.

Answer 4

The seven classes of vertebrates are:

-Agnatha

-Chondrichthyes

-Osteichthyes

-Amphibia

-Reptilia

-Aves and

-Mammalia