list five characteristic features of vertebrates
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Main Characteristics of Vertebrates are given below:
1) Well developed brain.
2) Brain lodged in to box or cranium.
3) Notochord, forms on the dorsal side of the primitive gut in the early embryo and is present at some developmental stage in all chordates.
4) Most possesses a through gut with a non-terminal anus.
5) Pharyngeal slitsconnect the pharynx, a muscular tube that links the mouth cavity and the esophagus, with the outside.
6) Possess at some stage of their life a hollow dorsal nerve tube.
7) Possess at some stage of their life a dorsal cartilaginous rod called a notochord.
8) Possess at some stage of their life gill slits in the pharyngeal region.
9) Has a partially open circulatory system.
10) They become slits, open to the outside in animals with gills, but disappear in those lacking gills.
11) Two pairs of appendages.
12) The endoskeleton of most vertebrates is made of cartilage or bone.
13) First, collagen is laid down in a matrix of fibers along stress lines to provide flexibility, and then calcium minerals infiltrate the fibers, providing rigidity.
14) The first vertebrates evolved in the oceans about 470 million years ago. They were jawless fishes with a single caudal fin.
15) The appearance of a hinged jaw was a major advancement, opening up new food options, and jawed fishes became the dominant creatures in the sea.
16) All vertebrates have a heart and a closed circulatory system.
17) In both their circulatory and their excretory functions, vertebrates differ markedly from other animals.
18) Reproduction normally sexual and gonochoristic.
19) Feed on a variety of organic materials.
20) Unisexual, gonad only one pair.
1) Well developed brain.
2) Brain lodged in to box or cranium.
3) Notochord, forms on the dorsal side of the primitive gut in the early embryo and is present at some developmental stage in all chordates.
4) Most possesses a through gut with a non-terminal anus.
5) Pharyngeal slitsconnect the pharynx, a muscular tube that links the mouth cavity and the esophagus, with the outside.
6) Possess at some stage of their life a hollow dorsal nerve tube.
7) Possess at some stage of their life a dorsal cartilaginous rod called a notochord.
8) Possess at some stage of their life gill slits in the pharyngeal region.
9) Has a partially open circulatory system.
10) They become slits, open to the outside in animals with gills, but disappear in those lacking gills.
11) Two pairs of appendages.
12) The endoskeleton of most vertebrates is made of cartilage or bone.
13) First, collagen is laid down in a matrix of fibers along stress lines to provide flexibility, and then calcium minerals infiltrate the fibers, providing rigidity.
14) The first vertebrates evolved in the oceans about 470 million years ago. They were jawless fishes with a single caudal fin.
15) The appearance of a hinged jaw was a major advancement, opening up new food options, and jawed fishes became the dominant creatures in the sea.
16) All vertebrates have a heart and a closed circulatory system.
17) In both their circulatory and their excretory functions, vertebrates differ markedly from other animals.
18) Reproduction normally sexual and gonochoristic.
19) Feed on a variety of organic materials.
20) Unisexual, gonad only one pair.
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Answer:
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.
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