Across

1. Animals with a back bone.
4. When a result can take any value within a range of values it is said to be ...
6. A small difference between members of the same species.
7. a type of animal with scales that only lives on land.
9. Being able to tell what something is.
14. Features that animals or plants have.
15. The lower part of an animal's body, containing the stomach and other organs.

Down

2. A type of animal that live in and out of water.
3. Similar plants or animals are put into a ....
4. Process of categorizing
5. Animals without a back bone.
8. A system of classifying objects, plants or animals.
10. A type of small, air-breathing animal with six legs.
11. Animals that gives birth to live young.
12. One of the five major divisions of living things.
13. An animal that lives in water and is covered with scales.