1. Appearance: Physical description of traits.
What an organism looks like.

2. Category:
Group based on their similarities.

3. Characteristic: The physical appearance of an organism.
Traits; special properties

4. Endangered: When there are low population numbers.
They could possibly become extinct.

5. Evolve:
Changing gradually.
Hereditary changes over time.

6. Extinct:
No longer exists.
Gone; disappear

7. Fossil:
Evidence of an organism.

8. Habitat:
The place where an organism lives.
niche

9. Organism:
Any living thing.

10. Structure: Physical features of an organism.
How something is built or put together.

11. Vestige:
A visible trace that something once existed.