Science Terminology

1. The last level of classification of living things
4. The building blocks of all living things
5. Jawless fish with an internal skeleton made of cartilage
7. The bony fish; example tuna
9. Describes animals with a body temperature controlled internally
10. One celled organisms without a nucleus
11. Animals with a nerve cord running down their backs and an endoskeleton
12. A key with two choices at each stage
15. Plants that bear their seeds on cones and have male and female cones on separate plants
16. Bacteria and fungi responsible for the natural breakdown of waste

2. Organism that feeds off its host and lives on its host
3. Describes animals with a body temperature that varies with the temperature of their surroundings
6. A subclass of mammals that lay eggs
8. 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
13. Cannot be seen without the help of a microscope
14. The division in the classification system below kingdom and above class