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26 Cards in this Set
- Front
- Back
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Describe the features of amphibians |
Vertebrate Cold blooded Lay eggs in water Non-amniote Water permeable skin Non-amniote Paedomorphic Aquatic larval stage (gill breathing) Terrestrial adult stage (lung breathing) |
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Name the 3 characteristics of living forms |
Life cycle often with aquatic larval stage Lungs poorly developed Skin as a respiratory organ with mucous glands to keep it moist |
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Name the 3 subclasses of Amphibians |
Labyrinthodontia - Stem amphibians Lepospondyll Lissamphibia - Modern amphibians |
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Name the 4 orders of Lissamphibia |
Pronura - protofrogs Anura - frogs, toads Urodela - Salamanders and newts Gymnophiona - Legless, worm-like forms |
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In which period did the first major groups of amphibians develop |
Devonian Period |
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What did the first major amphibians develop from? |
Lungfish and coelacanth These could not live their entire life on land |
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What are the advantages of leaving the water? |
Escape from predators Increase food sources Evidence - teeth |
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What are tiktaalik? |
They are an extinct species thought to be the missing link between fish and amphibians |
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How many years ago did the tiktaalik live? |
650 mya |
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What are the features of the tiktaalik? |
Fish: - Gills, Scales Fishapod: - half fish half tetrapod limb bones and joints, functional wrist joint, ear region Tetrapods: - Rib bones, mobile neck, lungs
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What are some reasons for the decrease in amphibians? |
Climate change Environmental change due to human activity Ultraviolet radiation - kills eggs and larvae Disease - Trematode - Iridovirus - Chytrid fungi |
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What are the 3 respiratory structures in frogs? |
Skin Lungs Buccopharyngeal cavity |
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What's the scientific name for the common frog? |
Rana temporada |
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What's the scientific name for a common toad? |
Bufo bufo |
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What is the name for frogs and toads? |
Anurans |
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After how long do tadpoles grow back legs? |
6-16 weeks |
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How do you tell the difference between male smooth newts and male palmates? |
The male smooth newt has spots on its throat |
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What is an eft? |
A terrestrial juvanile of newts Develop front legs first |
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Where do newts breed? |
Shallow pools and larger bodies of water Palmate newts are more tolerant of acidic waters Only found in ponds during breeding season |
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Which is one of the most well known protected amphibian species in the UK? |
Great crested Newt |
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What did Tetrapods most likely evolve from? |
sarcopterygians |
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What are the 2 lineages of ancient amphibians? |
Noamniote Amniote |
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What are the 3 orders of modern amphibians that rose from nonamniote? |
Caudata Gymnophiona Anura |
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What are Anura |
Frogs and toads |
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What are Gymnophiona |
Caecilians |
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What are caudata |
Newts, salamanders |
