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Mammals
Amphibians
Reptiles
Birds
Teeth is mainly made up of
Test tube baby means
Tetanus is caused by
Thalassemia is a hereditary disease. It affects
The 1st protocol to ban the emissions of choloroflurocarbons in the atmosphere was made in
The 1st stable product of photosynthesis is
The ability of the eye to see in the dark, is due to the production of a purple pigment known as
The ability to fix atmospheric nitrogen is found in the
The age of a tree can be determined more or less accurately by
The alimentary canal is usually longer in