In most species,the female frog lays her eggs directly in the water as a male clasps her back and releases sperm.The fertilized eggs hatch as legless,aquatic tadpoles.Most tadpoles feed on algae and have gills.As they mature,tadpoles develop legs and lungs,lose the tail,and acquire carnivorous tastes.The primary function of external gills in aquatic animals is to

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The primary function of external gills in aquatic animals is to exchange gases with the water, allowing the animal to obtain oxygen for respiration and expel carbon dioxide. This is important for survival in an aquatic environment where the concentration of oxygen in the water may be lower than in air.

In Most Species,the Female Frog Lays Her Eggs Directly in the Water