write down salient features of five classes of phylum vertebrata
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Answer:
One of the ways life is classified is through the presence or absence of the vertebrate. Vertebrates and invertebrates evolved from a common ancestor that was speculated to have lived around 600 million years ago.
Evidence of true vertebrates began to appear 525 million years ago and ever since then, vertebrates have branched off into a long lineage that includes armoured fish and giant sauropods to woolly mammoths and modern man.
Characteristics of Vertebrates
A vertebrate is an animal that has all of the following characteristic features at some point in its life:
A stiff rod running through the length of the animal (it could either be the vertebral column and/or notochord)
Humans and all other vertebrates possess a notochord as an embryo and it eventually develops into the vertebral column.
A bundle of nerves run above the vertebral column (spinal cord) and the alimentary canal exists below it.
The mouth is present at the anterior portion of the animals or right below it.
The alimentary canal ends in the anus, which opens to the exterior. The tail extends after the anus.
Explanation:
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