Show:
VERTEBRATES
REPTILE
AMPHIBIANS
FISH
FOSSILS
100
A nerve cord that runs down the back.
What is a notochord?
100
An ectothermic vertebrate that has lungs and scaly skin.
What is a reptile?
100
The larvae of a frog or a toad.
What is a tadpole?
100
Fish that have no jaws and no scales.
What is jawless fish?
100
Hardened remains or other evidence of a living thing that existed a long time ago.
What is a fossil?
200
Supports the body and helps it move.
What is endoskeleton?
200
An egg with a shell and internal membranes that keep the embryo moist.
What is an amniotic egg?
200
Stages in which a frog undergoes a series of changes from tadpole to adult.
What is metamorphosis?
200
Fish that have jaws, scales, a pocket on each side of the head that holds the gills, and a skeleton made of hard bones.
What is bony fish?
200
Hardened layers of particles of clay, sand, mud, or silt.
What is sedimentary rock?
300
The smaller bones that form the backbone.
What is vertebrae?
300
Has four legs, usually with clasws on the toes, long tails, external ears, movable eyelids, and two lungs.
What is a lizard.
300
Animals ability to disguise themselves in their environment.
What is camouflage?
300
Fish that have jaws and scales, and skeletons made of cartilage.
What is cartilaginous fish?
300
Scientist who study extinct organisms, examine fossil structure, and make comparisons to present day organisms.
What is a paleontologist?
400
An animal whose body does not produce much internal heat.
What is ectotherm?
400
Can swallow an animal much larger in diameter than itself.
What is a snake.
400
The two upper-chamber of the heart.
What is atria?
400
An internal, gas-filled sac that helps the fish stay stable at different depths in the water.
What is a swim bladder?
400
Imprints, such as a footprint, and remains of parts of living things.
What are some types of fossils?
500
An animal whose body regulates its own temperature by controlling the internal heat it produces.
What is an endotherm?
500
Has a sharped edged-beak instead of teeth for tearing food.
What is a turtle?
500
The specific environment in which animals live.
What is habitat.
500
Eggs are fertilized outside the female's body.
What is external fertilization?
500
First ever vertebrates to live on the earth.
What are fishes?