Fishes, Amphibians, And Reptiles Flashcards
At some point in their lives, all chordates have a flexible supporting rod in their backs called a…
Notochord
If an animal is ectothermic, it has….
A body that does not produce much internal heat.
What does the back bone surround and protect in a vertebrate?
The spinal cord.
Fish take in oxygen through their….
Gills
Most fishes reproduce by means of…..
External fertilization.
What kind of fishes has a skeleton made of hard bone?
Goldfish
The scales of many cartilaginous fishes are….
Pointed, giving the skin a rough texture
Most adult amphibians can obtain oxygen through……
Lungs and thin, moist skin
How many chambers are there in a typical adult amphibian heart?
Three
Amphibians are especially sensitive to changes in the environment because…..
Their skin is delicate
One major difference between lizards and snakes is that lizards…
Have legs. Like we really need to know that.
An adult reptile can survive on dry land because it’s kidneys….
Produce concentrated urine (pee)
How is a reptile egg different from an amphibian egg?
The reptile egg has a shell and internal membranes.
What two adaptions help a reptile keep water in its body?
Skin and kidneys
What is one way that a reptile’s egg is adapted to survive on land?
The egg has membranes that keep it moist
