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egg - Tiny frog eggs are laid in masses in the water by a female frog. The eggs hatch into tadpoles.
tadpole - (also called the polliwog) This stage hatches from the egg. The tadpole spends its time swimming in the water, eating and growing. Tadpoles breathe using gills and have a tail.
tadpole with legs - In this stage the tadpole sprouts legs (and then arms), has a longer body, and has a more distinct head. It still breathes using gills and has a tail.
froglet - In this stage, the almost mature frog breathes with lungs and still has some of its tail.
adult - The adult frog breathes with lungs and has no tail (it has been absorbed by the body).

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When frog laid babies , they were eggs.
They become tadpoles.
They have the hind legs.
They have the fore legs.
They become frogs.)