1. Symbiosis

2. Competition
The struggle between individuals or populations for a limited resource.

3. Competition
Competition can occur between members of the same or different species.

4. Competition
Example: Creosote bushes in the desert compete for water supply.
They excrete a toxin that prevents other bushes from growing around them.

5. Competition
Example: Strangler figs compete with trees for light, water, and nutrients.
The vines surround and eventually kill the tree.

6. Competition
Example: Vultures and hyenas compete over the remains of a dead animal.

7. Competition
Example: Many animals compete during the mating season.

8. Cooperation
Cooperation: organisms work in a way that benefits them all.

9. Cooperation
Orcas cooperate while they hunt.

10. Cooperation
Ants, bees, and termites have a complex social structure so that each individual cooperates in their assigned role.

11. Cooperation
Apes and monkeys live in family groups and cooperate to care for their young.

12. Symbiosis
Symbiosis: a relationship between individuals of two different species who live together in a close relationship.

13. Symbiosis
Mutualism: a type of symbiosis in which both interacting species benefit.
Each species is better off than they would be without the relationship

14. Symbiosis
Dogs and Humans: Dogs get food and shelter, humans get protection, companionship, and other services (police, therapy, sniffing, etc)

15. Symbiosis
Commensalism: A type of symbiosis in which one species benefits and the other is not affected (neutral).
One species is better off because of the relationship, while the other is neither harmed nor helped.

16. Symbiosis
Remora and shark: Remora gets a free ride, shark is unaffected

17. Symbiosis
Parasitism: a type of symbiosis in which one species benefits while the species it depends on (host) is harmed.
Tick and dog: Tick gets a meal, dog loses blood and is possibly infected with disease.