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Vertebrates
Author :
Luciana Riquelme
1
It help amphibians to swim
2
amphibians are cover with it
3
they lay eggs
4
wings are coverd by it
5
it cover the fish, it is similar to skin
6
Fish breathe through it
7
Fish use it to swim
8
birds have it to fly
9
3
2
6
5
7
4
9
1
8