Podcast
Questions and Answers
What characteristic primarily defines an amphibian's life cycle?
What characteristic primarily defines an amphibian's life cycle?
- A dual existence, living in water as a larva and on land as an adult. (correct)
- Breathing through gills during all life stages.
- The ability to survive in a fully terrestrial environment from birth.
- An exclusive reliance on aquatic environments throughout its life.
How does an adult amphibian typically respire?
How does an adult amphibian typically respire?
- Exclusively through gills.
- Only through their moist skin.
- Principally through lungs. (correct)
- Via a combination of gills and lungs.
Which feature is characteristic of amphibian skin?
Which feature is characteristic of amphibian skin?
- A thick layer of fur for insulation.
- A tough, leathery hide.
- A moist surface with mucous glands. (correct)
- A dry surface covered with scales.
What external structure do amphibians typically lack?
What external structure do amphibians typically lack?
The earliest amphibians to venture onto land are believed to have resembled what?
The earliest amphibians to venture onto land are believed to have resembled what?
During which geological period did the first amphibians appear?
During which geological period did the first amphibians appear?
Approximately how many species of amphibians are currently known?
Approximately how many species of amphibians are currently known?
To which class do amphibians belong in the animal kingdom?
To which class do amphibians belong in the animal kingdom?
What does the term amphibian literally mean?
What does the term amphibian literally mean?
Why is moist skin crucial for most amphibians?
Why is moist skin crucial for most amphibians?
How does the amphibian larval stage primarily differ from the adult stage in terms of habitat?
How does the amphibian larval stage primarily differ from the adult stage in terms of habitat?
What environmental condition is most threatening to amphibian populations worldwide?
What environmental condition is most threatening to amphibian populations worldwide?
What adaptation allows adult amphibians to survive on land?
What adaptation allows adult amphibians to survive on land?
Besides lungs, through what other means can some amphibians respire as adults?
Besides lungs, through what other means can some amphibians respire as adults?
Which ancestral group is most closely linked to the evolution of amphibians?
Which ancestral group is most closely linked to the evolution of amphibians?
Approximately when did the transition of amphibians from water to land occur?
Approximately when did the transition of amphibians from water to land occur?
In certain amphibian species, what role do mucous glands play?
In certain amphibian species, what role do mucous glands play?
How would you classify an animal that spends its larval stage in water and later develops the ability to breathe air?
How would you classify an animal that spends its larval stage in water and later develops the ability to breathe air?
What evolutionary advantage did the first amphibians gain by moving onto land?
What evolutionary advantage did the first amphibians gain by moving onto land?
Why is understanding the biology of amphibians crucial for conservation efforts?
Why is understanding the biology of amphibians crucial for conservation efforts?
Flashcards
What is an amphibian?
What is an amphibian?
Vertebrate animal that typically lives in water as a larva and on land as an adult.
Amphibian meaning?
Amphibian meaning?
The word amphibian means double life in greek.
How amphibians breathe?
How amphibians breathe?
They breathe with lungs as an adult.
Amphibian skin?
Amphibian skin?
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Scales and claws?
Scales and claws?
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First amphibians?
First amphibians?
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Devonian Period?
Devonian Period?
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Class Amphibia
Class Amphibia
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Study Notes
Biology - Amphibians
- An amphibian is a vertebrate, with a few exceptions.
- The word amphibian means "double life".
- Amphibians live in the water as larvae and on land as adults.
- Adults breathe with lungs.
- They have moist skin with mucous glands.
- Amphibians lack scales and claws.
- The first amphibians to climb onto land probably resembled lobe-finned fish.
- The first amphibians appeared in the Late Devonian Period, about 360 million years ago.
- There are currently 8,450 known species of amphibians.
- Amphibians belong to the class Amphibia.
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