frogs :: essays research papers

Frogs atomic number 18 usually small animals that substantiate smooth, let on skin, bulging eyes, and external eardrums behind the eyes the great(p)s lack a tail. Frogs have long hind legs, and most species can take long leaps. some species also have webbed feet, fashioning them excellent swimmers.Most frogs, peculiarly males, are quite vocal. As the frog forces atmospheric state by and through the portion box, or larynx, the vocal cords vibrate to make calls distinctive of its species. A much louder sound is produced by the males of species that possess vocal sacs, which swell hugely when the frog calls to attract a mate. The frogs tongue is attached at the expect of the mouth instead of at the rear, and it is covered with a sticky substance, making it an efficient trap.Like most amphibians, most frogs pass through a free-living fishlike larval stage before undergoing true metamorphosis into adult frogs. Many of these frogs lay their egg in water, although some lay th eir eggs on vegetation above the water, in wet places on land, or dismantle on the back of one of the parents. The breeding season varies agree to species and geographic region but often coincides with heavy spring or summer rains. Tadpoles have gills and a tail, and most feed on alga and other vegetation, although a few are carnivorous and may even feed on their siblings. As tadpoles mature, the tail is absorbed, lungs develop, the gills disappear, legs appear, and the adult frog diversity is established. Some frogs, especially in the tropics, do not go through a larval phase these frogs lay eggs, usually in damp places out of water, that hatch directly into froglets.Behavior Frogs live in a variety of habitats, but most prefer moist regions. Although they are air breathers, frogs can stay underwater for long periods, and they can breathe through the skin. Tree frogs are adapted for tree living other frogs are permanently aquatic still others spend most of their lives in thermi onic vacuum tube burrows, coming up only to feed or breed.