Classes of Fish
Fish
Circulation
Amphibians
Orders of Amphibians
100
How many classes of fish are there?
Three.
100
How long ago did fish appear?
Around 500 million years ago.
100
How many fewer chambers are in a fish's heart compared to an amphibians heart?
One.
100
Amphibians: Warm or cold blooded?
Cold blooded.
100
How many orders of amphibians are there?
Three.
200
Sharks are in which class?
Cartilaginous fish (chondrichthye)
200
How do fish reproduce?
By laying eggs.
200
Why does blood flow slowly in fish?
Fish are cold blooded.
200
How long ago did amphibians originate?
Around 350 million years ago.
200
What is the eating habit of the anura?
Omnivore.
300
What is the most ancient class of fish?
Jawless fish (agnatha)
300
How many species of fish are there?
More than 24,000.
300
Where does the right atrium receive blood from?
The Body.
300
What are amphibians a mix between?
Fish and reptiles.
300
What order of amphibians is tailless?
Anura.
400
What organ maintains buoyancy in bony fish?
Swim bladder.
400
What is the gill chamber protected by?
A platelet (operculum)
400
Name the three respiratory surfaces that amphibians have.
Lungs, gills, mucus-moistened skin.
400
What are two reasons that cause the decline of amphibians?
Pollution and poor state of the environment.
400
What do the gymphonia and the caudata have in common?
Both are carnivorous.
500
What structure do sharks use to sense movement in water?
Lateral Line.
500
What percentage of fish can live in salt water?
60%
500
Why do amphibians have one ventricle?
Deoxygenated and oxygenated blood are mixed.
500
At which stage are amphibians mostly herbivores?
When they are tadpoles.
500
What do the caudata and the anura have in common in their characteristics?
They both have legs.
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