| Term | Definition |
|---|
| The part of the egg that nourishes the embryo is the | yolk |
| A lamprey is a kind of | jawless fish |
| Vertebrates are a subgroup of the phylum of | chordates |
| The structure that helps fish stabilize at different depths is the | swim bladder |
| Fossils are found most frequently in a kind of rock called | sedimentary rock |
| Which of the following is NOT an ectotherm? | parrot |
| One animal that cares for its newly hatched young is a(n) | alligator |
| An animal whose body temperature changes depending on the temperature of the environment is called a(n) | ectotherm |
| Fossils found in higher layers of rock are usually | younger than fossils found in lower layers |
| The name amphibian refers to an amphibian's ability to | live on both water and land |
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