Fish do this by flexing their bodies and tail back and forth.
What is swim?
Amphbians are born from eggs, which means that they are this.
What is oviparous?
Reptiles are this type of animal.
What is cold-blooded?
Birds lay this type of eggs.
What are hard shelled eggs?
Mammals have this type of heart.
What is a four-chambered heart?
This covered fish's body.
What are scales?
Amphibians breath with this when it is a baby.
What is gills?
What are most repiles' skin covered with?
What is scales?
What do birds use to breathe?
What are lungs?
Mammals reproduce by this.
What is internal fertilization?
Fish breathe with this.
What are gills?
The skin of a amphibian.
What is smooth, moist skin?
Reptiles breathe with this.
What are lungs?
Feathers that covered the birds' chest and belly and maintain the body at a constant temperature.
What are down feathers?
This type of mammal lay eggs. (ex.duck-billed platypus)
What are monotremes?
This organ helps a fish to stay at a certain depth in water.
Wht is swim bladder?
The adult amphibians use these to breathe.
What are lungs and skin?
Reptiles are characterized in this way.
What is their special way of moving?
These are bags full of air that are connected to lungs which help birds to fly.
What are air sacs?
This type of mammal have the longest gestation period.
What are placental mammals?
The lateral line is important for fish is because of this.
What is detects pressure or vibrations?
The process of transformation of a amphibian from an immature form to an adult form in two or more distinct stages.
What is metamorphosis?
Reptiles' name in latin means this.
What is to crawl or slither?
This type of birds only eat fish.
What are piscivores?
Mammals are grouped in this way.
What is how babies grow up?