Question

what are the divisions of vertebrate animals? write at least one character from each of chordata​

Answer 1

Answer:

vertebrates are grouped into six classes

Explanation:

1. Pisces
2. amphibia
3. reptilian
4. aves
5. mammalia
6. cyclostomata

• pisces- these are fishes and exclusively aquatic animals .their skin is covered with scales. they obtain oxygen dissolved in water by using gills. the body is streamlined and muscular tail is used for movement .they are cold blooded and their hearts have only two chambers. they lay eggs
• amphibia- these animals differ from the fish in the lack of scales. they have mucus glands in the skin. have a three chambered heart. respiration is either through gills and lungs. they lay eggs. these animals are found in water and on land
• reptilia- these animals are cold blooded animals.they have scales .they breathe through lungs most of them. have a three chambered heart except crocodile which has a four chambered heart. they lay eggs with tough covering and do not need to lay their eggs in water unlike amphibians. snakes turtle lizard and crocodiles fall in this category
• aves - these are warm blooded animals. they have four chambered heart. they lay eggs. there is an outside covering of feathers and 2 forelimbs are modified for flight .they breathe through lungs. allbirds fall in this category
• mammalia- mammals are warm blooded animals. they have four chambered heart. they have mammary glands for the production of milk to their young ones. their skin has hair as well as wet and oil glands .most mammals familiar to us produce live young ones. however a few of them like the Platypus and the exit in our legs and some like kangaroos give birth to very poorly developed young ones
• cyclostomata- cyclostomes are jawless vertebrates .they have an elongated Eel body .they have a circular mouth. their skin is slimy scalesless. they are ectoparasites or poreless of the Other vertebrates .example hagfish and lamprey

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