GENERAL
The number of chambers in a mammal's heart.
What is 4?
A ____ fish has no hinged structures that enable it to open and close its mouth.
What is jawless?
A turtle's ____ includes the turtle's ribs and backbone.
What is a shell?
How many chambers are there in a typical adult amphibian's heart?
What is 3?
A ____ is a type of mammal that lays eggs.
What is a monotreme?
Describe how a reptile egg is different from an amphibian egg.
What is a reptile egg has a shell and internal membrane?
Fish take in oxygen through their _____.
What are gills?
The ____ inside a reptile's egg provides the embryo with food.
What is the yolk?
A tadpole loses its tail and develops legs during the process called ______.
What is metamorphosis?
List three features that characterize mammals.
What are hair, mammary glands, and a 4-chambered heart?
Which structures do birds share with no other animals?
What are feathers?
Goldfish are a type of _____ fish.
What is bony?
Three major groups of reptiles are _____.
What are snakes and lizards, alligators and crocs, and turtles?
How do most adult amphibians obtain oxygen?
What are lungs and thin, moist skin?
____ are teeth used by carnivores to tear flesh.
What are canines?
What would happen if a fish's swim bladder was destroyed?
What is stabilize body at different depths?
One difference between sharks and most fish is that sharks have _____ fertilization.
What is internal?
Which organs help a reptile keep water in its body?
What is skin & kidneys?
____ are amphibians that keep their tails as adults.
What are salamanders?
Pregnant female monotremes and marsupials lack a(an) ______, which is an organ that passes materials between an embryo and its mother.
What is a placenta?
At some point in their lives, all chordates have a flexible, supporting rod in their backs called ____.
What are notochords?
Sharks, rays, skates have skeletons made of ____.
What is cartilage?
Organs that filter water from the blood with wastes being excreted as urine.
What are kidneys?
Organs that are used to breathe on land.
What are lungs?
A ____ is a mammal in which the young have a second period of development in their mother's pouch.
What are marsupials?