Activity: Observe and list the various kinds of animals in your locality. Classify them into vertebrates and invertebrates.
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I am not sure if you are 66
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Vertebrates have straight backs and have backbones.
This is associated with the species which has been land and transport them to water and others.
The oldest region can be determined by taking proper results and as mammals evolved near the backbone are called as invertebrates.
It is thinking of backs and further classified on water mammals and oldest ones.
It is all having backbones and species deposit their eggs on land and transport them to water.
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