Tadpole
Videos
A tadpole or polliwog is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles
Common frog (Rana temporaria) tadpole
Ten-day-old tadpoles. The external gills will eventually be hidden by a layer of skin.
Direct development
Videos
Direct development is a concept in biology. It refers to forms of growth to adulthood that do not involve metamorphosis. An animal undergoes direct development if the immature organism resembles a sma
Direct development in the pumpkin toadlet Brachycephalus ephippium