| A | B |
|---|
| What phylum do vertebrates belong? | Chordata |
| At some point, all mammals have... | notochords |
| What does the backbone protect in the vertebrate? | the spinal chord |
| If an animal is an ectotherm, it has... | a body that does not produce much internal heat |
| If the environment changes, the reptile's | temperature changes. |
| An animal whose body maintains even heat | is an endotherm |
| Fish take in oxygen through their | gills |
| Most fish reproduce through | external fertilization |
| What type of fish is a lamprey? | jawless fish |
| Which fish has a skeleton made of bone? | goldfish |
| What is the function of a swim bladder? | to control buoyancy |
| How do adult amphibians obtain oxygen? | lungs and thin, moist skin |
| How many chambers does an adult amphibian have in its heart? | three |
| Why are amphibians especially sensitive to changes in the environment? | their skin is very thin |
| An adult reptile can survive on dry land because its kidneys | produce concentrated urine |
| How is a reptile egg different from an amphibian egg? | It has a soft, leathery shell. |
| What is one way that a reptile's egg is adapted to survive on land? | Egg has membranes that keep the embryo moist. |
| What is the major difference between lizards and snakes? | Lizards have legs, snakes do not. |
| What is true of the feeding behaviors of all snakes? | They are carnivores |
| Birds are the only animals that have | feathers |
| Evidence indicates that birds are descended from | reptiles |
| A bird's nearly hollow bones help it to | fly |
| Feathers help keep a bird warm by | trapping air next to the bird's body |
| Some birds swallow small stones which help them | digest food |
| Where do many birds store food that they are not ready to digest? | in the crop |
| Toes of perching birds are adapted to help the birds | lock onto a branch |
| What adaptation helps an ostrich survive in its environment? | It uses its strong legs to run away from predators |
| What is the name for the upward force that enables a bird to fly? | lift |
| Which characteristic is common to all mammals? | Their hearts have four chambers |
| Fur is an adaptation that allows mammals to | survive cold climates. |
| What is the function of canine teeth? | to stab food and tear into it |
| What characteristic is used to classify mammal species? | The way their young develop |
| Which type of mammal lays eggs? | monotreme |
| Name a monotreme. | duck-billed platypus |
| What is a gestation period? | length of time between fertilization and birth |
| Where does a placental mammal develop before birth? | Inside the mother's body |
| What is the function of the placenta? | pass materials between the mother and the embryo |
