Young frogs are known as tadpoles (a fish-like form or organism). <\/p>\n\n\n\n They have a tail and external gills but no legs.<\/p>\n\n\n\n To understand this, first we have to undergo the things about Amphibians like frogs, toads, newts, and salamanders.<\/p>\n\n\n\n Amphibians are cold-blooded vertebrate. They can live either\u00a0on land or water. But breed only in water. <\/p>\n\n\n\n <\/p>\n\n\n\n There comes three orders under class Amphibia.<\/p><\/blockquote>\n<\/div>\n\n\n\n One is Anura. Frogs and toads come under this order.<\/p>\n\n\n\n The second is Urodela. Newts and salamanders make up this order.<\/p>\n\n\n\n The third order is Apoda. Caecilian are of this order. They legless and nearly blind.<\/p>\n\n\n\n The typical characters of amphibians are they have moist, scaleless, hairless skin; lungs. They are cold-blooded as said before. <\/p>\n\n\n\n Amphibian lungs are ventral outpocketings of the gut, though they lie dorsal to it.<\/p>\n\n\n\n Another most important feature is they undergo complete metamorphosis. They lay eggs in water. Then the metamorphosis starts from eggs through various stages of water-living larva such as tadpoles to froglet and to land-living adult frogs. <\/p>\n\n\n\n Typically these adult frogs and toads include a squat body with no tail; long, powerful hind legs; and large, often bulging, eyes. <\/p>\n\n\n\n In case of adult newts and salamanders, these features differ. They typically have a long body with a well-developed tail; and relatively short, equal-sized legs.<\/p>\n\n\n\n However, newts and salamanders show considerable variation; for example, in some species the adults have minute legs, external gills rather than lungs, and spend their entire lives in water.<\/p>\n\n\n\n Now let\u2019s come to the main topic that why young frogs i.e. tadpoles have no legs that the reason is frogs undergo complete metamorphosis. <\/p>\n\n\n\n <\/p>\n\n\n\n Eggs (also known as spawn) are laid in water.<\/p><\/blockquote>\n\n\n\n And hatch into young tadpoles.<\/p><\/blockquote>\n<\/div>\n\n\n\n These tadpoles (the little frogs in water) have a tail and external gills but no legs.<\/p>\n\n\n\n As the tadpoles grow, the gills disappear, back legs develop, then front legs, and the tail shrinks. Eventually the tail disappears, resulting in a young adult frog. That\u2019s it. <\/p>\n\n\n\n That is the complete process of metamorphosis of frogs. <\/p>\n\n\n\n <\/p>\n\n\n\n![\"\"](\"https:\/\/mamlabs.net\/wp-content\/uploads\/2022\/02\/01.tadpoles-1024x563.jpg\")
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