B4.2

2. An organism that uses external energy sources to synthesize its own organic molecules.
6. The actual conditions and resources a species uses in the presence of competition.
7. Non-living factors like temperature that define the limits of a niche.
10. An organism that obtains organic molecules from other organisms.
13. A type of nutrition involving the ingestion, digestion, and absorption of food.
14. A mixotroph that can switch between autotrophic and heterotrophic modes.
16. Competition between members of different species for the same resource.

1. The entire range of conditions and resources a species could potentially occupy.
3. A mixotroph that must use both modes of nutrition simultaneously to survive.
4. Competition between members of the same species for resources.
5. The process where nutrients are incorporated into the cells and tissues of an organism.
8. The inevitable displacement of one species by another when niches overlap perfectly.
9. Living factors like predation and competition that shape a niche.
11. The principle stating that two species cannot occupy the exact same niche.
12. The functional role and position of a species within its environment.
15. An organism that can use both autotrophic and heterotrophic modes of nutrition.