Section 1
Chordates have a flexible rod that supports the animals back. What is this called
notochord
What is an ectotherm?
an animals whose body does not produce much internal heat; changes with the environment
Cartilaginous fish skeletons are made up of what
cartilage
Which of the following are reptiles
snakes, alligators, lizards, and salamanders
snakes, alligators, lizards
Name two functions of the endoskeleton
protects, shape of body, muscles attach, etc.
What is the connective tissue that is softer than bone but flexible and strong
cartilage
Fossils occur most frequently in what type of rock
sedimentary
This body part helps stabilizes the fish at different water levels
swim bladder
Why do reptile eggs not dry out when they are laid
Name one adaptation that endotherms use to help maintain their body temp
fur, sweat glands, etc.
A backbone is formed by similar bones. An animal with a backbone is called a what
vertebrate
Fish make up the smallest group of vertebrates
FALSE; largest
a flexible flap that opens to release water from the gills
A reptiles heart has two chambers
FALSE; three!
What is a fossil
hardened remains from animals that lived a long time ago
Most vertebrates backbone is internal. When an animal has an internal skeleton it is called a what?
endoskeleton
Most fish have what type of fertilization
external; eggs are fertilized on the outside of the females body
TRUE OR FALSE
An amphibian spends its early life in water and on land during its adulthood
TRUE
Instead of teeth, what do turtles use to eat their food
sharp-edged beak
Compare and Contrast (one of each) alligators and crocodiles
A- rounded, broad snouts, few teeth show when mouth is shut
C- pointed snout, most teeth show
Both- carnivores, strong, muscular tail etc.
An animal whose body controls and regulates its temp. by controlling internal heat it produces is called a what
endotherm
Some fish do not have jaws. Tell me one fact about jawless fish
They do not bite
they do not have scales
the water
Some biologist think what animal are dinosaurs with feathers
BIRDS
Draw the blood flow through a fish's circulatory system
blood leaves heart, enter gills, blood gets oxygen from water, CO2 moves from blood to the water, blood moves through the blood vessels, oxygen poor blood returns back to heart, repeat