what are the amphibians characteristics?
8879
Many amphibians, such as frogs, undergo a metamorphosis, meaning they begin life in the water and live on land as adults. Defining characteristics of these creatures include moist, scaleless skin and the fact that they are cold-blooded. Amphibians absorb water and undergo gas exchange through their skin.
949784
['Have a back bone and are considered vertebrates.', 'Are cold-blooded, which means they are unable to regulate their own body temperature.', 'Spend part of their lives in water and on land.']
344705
['comparatively slim body with long neck.', 'narrow head with small eyes and outer ears.', 'paddle-like paws with webbed toes.', 'short tail (7 to 13 centimetres)', 'five short, non-retractable claws.', 'body covered with hair, with the exception of the lips, the nose and part of the soles of the feet.']
293367
It's all about the skin: First – Amphibian skin is smooth and moist. They do not have that thick, scaly skin that is a trait of all reptiles. Amphibians do not have scales, feathers, or even hair like other animals.
1373647
['They are widely distributed, aquatic or terrestrial, parasitic or free-living.', 'Their body is elongated, cylindrical, unsegmented, worm-like, bilaterally symmetrical and tapering at both ends.', 'They are triploblastic animals with perivisceral cavity more extensive than that of platyhelminths.']
905342
Tadpoles are born with gills, just like a fish, so that they can breathe under water. They have a big head and a long tail. They definitely do not look like frogs, yet! ... They are a favorite food to fish and water beetles.
730454
Most amphibian species live in freshwater or moist terrestrial environments but not marine environments. Although there are no marine amphibians alive today, some species of frogs can tolerant brackish water. Some species, like desert toads, have adapted to arid conditions but still require aquatic habitats to breed.
35060
['Gills or ability to hold breath underwater for long periods.', "Fins or limbs adapted for swimming, including webbed feet, for animals that don't spend all their time in the water, like otters and beavers;", 'Tails that act as paddles.']
890054
['Resemble bony fish and terrestrial vertebrates in having jaws and paired appendages.', 'An electroreceptive system is well developed.', 'Endoskeleton entirely cartilaginous.', 'No swim bladder or lung.']
959223
['Ectothermic. ... ', 'Dry scales (impermeable to water) shared several times a year, toes with Clauss, body plan better adapted to living on land. ... ', 'Paired limbs. ... ', 'Bone. ... ', 'Carnivores and herbivores. ... ', 'Lungs are spongy, allows for more gas exchange most reptiles have two, snakes only have one lung.']
1288402
Defining characteristics of these creatures include moist, scaleless skin and the fact that they are cold-blooded. Amphibians absorb water and undergo gas exchange through their skin. There are three orders of amphibians. Urodeles have legs and a tail, such as salamanders.
303003
A tadpole is the larvae of a frog. Tadpoles use gills to live in water. As they grow they develop legs and lungs, and then leave the water as frogs.
292353
['They are well built with good body conformation.', 'They can survive or travel long distance without water.', 'They are rugged and have very great strength.', 'They have strong hind limbs.', 'They are docile and tolerant.']
219882
The Common Frog is an amphibian. Amphibians have been on earth for at least the last 250 million years. The name of this class of animals reflects the fact that while the adults are largely terrestrial, they must return to the water to breed.
1220049
Toads. Like frogs, toads are amphibians. They differ from most frogs because they have dry skin, warts, crests behind the eyes, and parotoid glands. The parotoid glands produce a poisonous secretion that helps the toad defend itself from predators.
1051229
['They are eukaryotic, which means they have a nucleus.', 'Most have mitochondria.', 'They can be parasites.', 'They all prefer aquatic or moist environments.']
994932
['Unshelled Eggs. Living amphibians produce much different eggs than strictly terrestrial organisms like reptiles do. ... ', 'Permeable Skin. While caecilians have scales similar to fish, most other amphibians have moist, permeable skin. ... ', 'Carnivorous Adults. ... ', 'Distribution. ... ', 'Courtship Rituals.']