Zoology Amphibian Test

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Approximately how many living species of amphibian are there?
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Terms in this set (16)
Approximately how many living species of amphibian are there?
About 4,000
What does the word amphibian mean? How does it correlate with the lifestyle of an amphibian?
Double life; part of their life is spent in water and other on land
Define amphibian using at least 3 distinguishing characteristics in your definition
Vertebrates that are aquatic as larvae and terrestrial as adults ; have no shell, double life, and no scales
What do most scientist believe is the ancestral group for amphibians?
Lobe finned fish
How is the body plan of an amphibian adapted for life on land when compared to a fish?
Amphibians have powerful limbs, tympanic membrane and a rib cage
Amphibian population were successful on land for a period of time. What ultimately caused the decline of most amphibian populations around 245 million years ago?
Climate change
Explain the difference in modes of feeding between frog/toad tadpoles and adult frog/toads
Frog/toad tadpoles are herbivores/ filter feeders and adults are carnivores
What structures do most larval amphibians use for respiration?
Lungs, skin, and mouth cavity
Explain forced air breathing in amphibians.
They fill their mouth cavity with air, close their mouth, and force air back through an opening called the glottis into the lungs
How many chambers are in the hearts of a tadpole?
2 chambers; 1 atria, 1 ventricle
How many chambers are in the heart of an adult amphibian?3 chambers; 2 atria, 1 ventricleWhy does the nitrogen containing waste of adult amphibians have to be converted into urine before it can be eliminated from the body?They are terrestrial , ammonia is toxicDescribe several sensory structures that the frog has that are not seen in fishesNicitating membrane- protects from under water damage ; tympanic membrane- hearExplain mating in frogs. Is fertilization internal or external?Male climbs onto female back and squeezes, most are external; some are internalCompare and contrast salamanders with frogs/toadsFrogs/toads lose tails as adults, have gills or lungs; salamanders keep tails, larva/adult are carnivore; both are vertebrates, amphibians and live double lifeCompare and contrast frogs with toads .Frogs spend most of the time in streams/ponds, they are smoother skin and more green; toads often live in moist woods, have rough skin, and are more brown