Fish
Fish tank in oxygen through their ______.
Gills
At some point in their lives, all chordates have a flexible supporting rod in their backs called a ______.
Notochord
One major difference between lizards and snakes is that lizards have ____ .
Legs
Birds are the only animals that have _____.
A. scales
B. feathers
C. nests
D. a heart with four chambers
Feathers
Fur is an adaptation that allows mammals to ___.
Surviving in cold climates
What type of fish is a lamprey?
Jawless
Most adult amphibians obtain oxygen through their _____.
Lungs and thin moist skin
A large part of a turtle’s body is covered by a protective ____.
Shell
A bird’s nearly hollow bones help it to _____.
Be lightweight in the air
What characteristic is used to classify mammals as monotreme, marsupial or placental mammal?
The way in which its young develop
Lamprey, hagfish and sharks have skeletons made out of this material.
Cartilage
How many chambers are there in a typical adult amphibian’s heart?
3
A reptile’s kidneys excrete waste in a watery fluid called ___.
Urine
If an animal is an ectotherm, it has ____.
Body that doesn't produce internal heat
The function of the placenta is to ____.
Pass materials between the mother and embryo
Fish depend on these fan-shaped structures for balance, steering and swimming.
Fins
The larva of a frog is called a(an) _____.
Tadpole
The ___ inside a reptile’s egg provides the embryo with food.
Yoke
What is the major difference between reptile and bird eggs?
Reptile are soft shelled, birds have hard shelled eggs
A mammal that carries its young inside the uterus until birth is a(an) ____.
Placental mammal
Most bony fish have this special organ that helps them swim.
Swim Bladder
Amphibians are ____ because their body temperature changes with the temperature of the environment.
Ectotherm
Both mammals and reptiles share one aspect of their reproductive cycle, _____ fertilization.
Internal
What mammal shares a reproductive similarity with birds?
Monotremes lay eggs
Mammals that lay eggs are known as ___
Monotremes