This class of vertebrates has more differences among its members than among any other vertebrate group.
What is fish?
100
There are 3 classes of fish. What are they?
What are jawed cartilaginous, jawless, and bony?
100
These amphibians have short, broad bodies, 4 legs, no neck or tail, and strong hind legs to swim and jump.
What are frogs and toads?
100
Name three examples of reptiles.
What are turtles, crocodilians, lizards, and snakes?
200
True or false: to be a chordate, an animal must have all four characteristics present at some stage of their development.
What is true?
200
All vertebrates have an internal framework called this.
What is an endoskeleton?
200
This organ is used to adjust a fish's density (move up and down like a submarine).
What is a swim bladder?
200
Describe the characteristics of salamanders (at least 2).
What are short legs, hide under leaves and rocks to avoid heat of the sun, breed on land or water?
200
This adaptation helps reptiles to reproduce.
What is an amniotic egg?
300
This characteristic becomes the gills in fish.
What are pharyngeal pouches?
300
This is the plural of vertebra (spell it!).
What is vertebrae?
300
These organs are used to exchange oxygen and carbon dioxide in fish (breathing).
What are gills?
300
These are the stages of a frog's metamorphosis.
What are egg to tadpole to frog?
300
This is a difference between crocodiles and alligators?
What is crocodiles have narrow heads and triangular snouts, while alligators have broad heads and round snouts? Crocodiles are also more aggressive.
400
This muscular structure is at the end of the chordate.
What is a postanal tail?
400
Vertebrates have endoskeleton so made up of bone and flexible tissue called this.
What is cartilage?
400
These enable fish to sense their environment and detect movement.
What is the lateral line?
400
Describe how amphibians can tell us about their environment.
What is that they are affected by changes in the environment (like pesticides and pollutions), because they absorb gases through their skin?
400
How does scaly skin help reptiles?
What is it helps to reduce water loss?
500
This characteristic forms the brain and spinal cord?
What is the nerve cord?
500
When an organism's temperature changes with the environment, that organism is an ____________.
What is an Ectotherm?
500
This class of fish has a tubelike body and a round mouth.
What is jawless fish?
500
Explain the difference between hibernation and estivation.
What is hibernation is done by amphibians in cold weather by hiding in mud and leaves, while estivation is done by amphibians to escape the hot weather (hide in mud underground)?
500
This characteristic most helped early reptiles to survive.
What is that they did not need water for reproduction?