Science Terminology

4. Fish with proper jaws and teeth, a skeleton made of cartilage and fins on the sides of their bodies as well as along their backs
8. Bacteria and fungi responsible for the natural breakdown of waste
9. The division in the classification system below kingdom and above class
10. Describes animals with a body temperature that varies with the temperature of their surroundings
12. Cannot be seen without the help of a microscope
14. Animals with a nerve cord running down their backs and an endoskeleton
15. One celled organisms without a nucleus

1. Jawless fish with an internal skeleton made of cartilage
2. The last level of classification of living things
3. Plants that bear their seeds on cones and have male and female cones on separate plants
4. The building blocks of all living things
5. The bony fish; example tuna
6. A key with two choices at each stage
7. Describes animals with a body temperature controlled internally
11. A subclass of mammals that lay eggs
13. Organism that feeds off its host and lives on its host