Question

What are the main properties are characteristic of the vertebrates?

Answer 1

they have notochord
they are bilaterally symmetrical
they have skull and several other skeletal bones which form and endoskeleton
they have a dorsal hollow nerve cord
have well developed brain

Answer 2

Vertebrate Characteristics

General characteristics of the sub-phylum Vertebrata are as follows: 
Vertebrates have a well developed brain.Brain is set inside a bony box, known as cranium.Notochord is present in all chordates during sometime of development, it is formed on the dorsal side of the primitive gut in the early embryo stage.Most vertebrates possess guts with a non-terminal anus. The mouth cavity and the oesophagus is connected by the pharyngeal gill slits to a muscular tube pharynx, which opens to the exterior.They possess a dorsal hollow nerve tube at some stage of their life. Possess a dorsal cartilaginous nerve rod known as the notochord. At some stage of their life possess gill slits in the pharyngeal region.Have partially open circulatory system.Possess two pairs of appendages.The endoskeleton is made of cartilage or bone.The first vertebrates were jawless fishes with single caudal fin.The advancement of vertebrates with a hinged jaw which opened new food options and jawed fishes became the dominant creatures in the sea.All vertebrates have a heart and closed circulatory system.Reproduction is normally sexual.Feed on variety of organic materials.Unisexual animals, have one pair of gonads.


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