Year 7 Biology

3. A class of chordates that has moist skin, lives in and out of water and whose young have gills
4. A phylum of animals that have a jointed exoskeleton
6. A class of chordates whose body is covered in hair and feed their young on milk
7. A group of animals whose body temperature varies with the temperature of the environment
8. A group of animals whose body temperature is reasonably constant
9. key A key with two choices at each stage
12. A group of animals that have a nerve cord and an endoskeleton
13. A class of chordates with scales, and lungs that lay soft shelled eggs

1. A class of chordates that live underwater, covered with scales and breathes through gills
2. A class of arthropods that have 3 pairs of legs and 3 body parts
3. A class of chordates whose body is covered in feathers and lay hard shelled eggs
4. A class of arthropods that have 4 pairs of legs and 2 body parts
5. A skeleton that is outside the body
10. The process of grouping things
11. A skeleton that is inside the body