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| Fish started out as vertebrates with no ___or ____. |
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| What is an example of a jawless fish? |
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| Fish eventually began to develop ___ and next came the ____fish. |
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| Describe the skeleton of cartilaginous fish. |
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Definition
| they had a skeleton but it was made of cartilage not bone |
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| What is an example of a cartilaginous fish? |
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| After cartilaginous fish came the _____. |
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| What are the two types of bony fish? |
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Definition
| ray finned and lobe finned |
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| What are four characteristics of the bony fish? |
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Definition
| swim baldder, closed cardiovascular system, nervous system and brain, external fertilization |
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| After bony fish came _____. |
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Definition
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Term
| How were amphibians different from fish? |
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Definition
| they had four legs, they had a three chambered heart, internal lungs so they can breathe air, and a larger brain than fish |
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| After the amphibians came the _____. |
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| Reptiles are different from fish and amphibians because they produce____and their ____are more developed than amphibians. |
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| Both amphibians and reptiles are _____. |
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| Birds have ____that are modified scales. They also have a ____heart, and their forlimbs are modified for____. |
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Definition
| feathers, four chambered, wings for flight |
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Term
| Like reptiles birds do not have a ____and they excrete ___to remove waste. |
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Definition
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| Birds were the first animals to _____. |
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| Mammals are different from most other animals because of their _____, ____, and ____. |
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Definition
| skull, teeth, arched vertebral column |
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Term
| What are the three most distinguishing features of a mammal? |
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Definition
| hair, milk producing mammary glands, endothermic |
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Term
| what are the three ways mammals reproduce? |
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Definition
| lay eggs, have pouches, or have a placenta |
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