How is an organism different from a population?

1. An organism is a living thing that has an organized structure, can react to stimuli, reproduce, grow, adapt, and maintain homeostasis.
2. A population is a group of many organisms.

Organism	Population
An organism is a living species (it can be an animal, plant, microbe insect, etc.)	Population is the term used for several organisms of the same species living together in the same geographical area.
2. It is the first level of organization in an ecosystem.	2. It is the second level of organization in an ecosystem.
3.Example: humans, fly, etc	3.Example: a pride of lions or a hoard of horses.