1. What two parts make up an organism's niche?

organism's niche is comprised of two parts:<br /><br />* **Fundamental Niche:** This describes the *potential* range of conditions and resources an organism *could* theoretically use if there were no competition from other species. It represents all the possibilities for the organism.<br /><br />* **Realized Niche:** This describes the *actual* conditions and resources an organism uses in the presence of competition and other biotic interactions (like predation or mutualism). It's the portion of the fundamental niche that the organism actually occupies. It's often smaller than the fundamental niche.<br />