Across
- 2. the process by which an existing community is replaced by another community
- 3. Thinking of something before it happens kind of like a hypothiesis
- 7. the destruction of an organism or the removal of an organism from its habitat
- 8. a chemical precess that occurs in a living thing
Down
- 1. a guide that compares pairs of observable traits to help the user identify an organism
- 4. The chemicals link between atoms that hold molecules together
- 5. The combined characteristics that effect the species for the better or worse
- 6. low to high and requires energy
- 9. A substance that can speed up the rate of a chemical reaction without being changed or used up during the reaction