| A | B |
|---|
| vertebrates adapted to living their entire lives in water | fish |
| vertebrates that can live in water or on land but must return to the water to reproduce | amphibian |
| Both fish and amphibians are _______. | cold-blooded |
| How do the respiratory systems of fish and amphibians differ? | Most fish have gills throughout their lives, while most amphibians begin life with gills and then develop lungs. |
| why are fish and amphibians classified as vertebrates? | They have an internal skeleton with a backbone that protects the spinal cord. |
| How do fish and amphibians reproduce? | both lay eggs without shells in water |
| How are the body temperatures of fish and amphibians affected by the temperature of their surroundings? | They change as the temperature of their surroundings changes. |
| What structures do fish and amphibians have to move? | fish have fins; amphibians have four limbs |
| How many chambers of the heart do fish and amphibians have? | fish have two: amphibians have three |
| What is the basic structure of the bony fish? | All bony fish have a bony skeleton and caudal, anal, dorsal, pelvic, and pectoral fins. Bony fish differ in overall shape, size of fins, and colors. |
| How do bony fish reproduce? | females lay eggs in the water, and then the males of the same species fertilize the eggs |
| What are the main characteristics of cartilaginous fish? | a skeleton made of cartilage, no swim bladder, hinged jaws, eggs fertilized within the female |
| Sharks, rays, and skates are examples of ______ fish. | cartilaginous |
| flexible tissue that forms the skeletons of most vertebrate embryos | cartilage |
| examples of amphibians | frogs, toads, newts, salamanders, caecilians |
| What are the main characteristics of amphibians? | They spend part of their lives fresh water and part of land; they are vertebrates that have no covering of scales or hairs; their skin is soft, thin, and moist and can absorb water; most have webbed feet |
| How can adult amphibians breath (3 ways)? | through lungs, skin and roof of mouth |
| What is the main difference between a toad and frog? | the texture of the skin; frogs are smooth and toads are rough |
| Caecilians have __ limbs. | no |
| What class of fish has the greatest number of species? | bony fish |
| How are rays adapted to their environment? | They have flattened bodies that allow them to glide ove the bottom of the ocean. |
| In what forms do most amphibians begin their lives after hatching from eggs? | tadpoles or larvae |
| What do fish and amphibians both have? | backbones |
| How does the membrane that encloses an embryo allow animal species to survive on land? | it surrounds a developing embryo in the water that it needs |
| _ have a dry protective covering of scales or plates. They usually have four legs with clawed toes. | Reptiles |
| Orders of reptiles | tuataras, turtles, crocodiles and alligators, lizards and snakes |
| the only animals that have feathers | birds |
| warm-blooded | bodies stay at the same temperature of their surroundings |
| example of warm- blooded animals | birds |
| What are three ways flying is useful to birds? | escaping predators, finding food, and migrating |
| _are warm- blooded vertebrates that have milk- producing glands called mammary glands. | Mammals |
| What are mammary glands used for? | nursing young |
| What characteristics of mammals make them different from other animals? | hair, mammary glands, diaphragm |
| What group of vertebrates contain the most species? | FISH |
