2. Ecosystem
• A specific place where living things interact
with non-living things.

3. COMPONENTS OF AN ECOSYSTEM
• BIOTIC FACTORS (living)
• ABIOTIC FACTORS (non-living)

5. MUTUALISM
• A give and take relationship wherein both
living organisms are benefitted.

6. COMMENSALISM
• Only one of the organism is benefitted, while
the other is neither benefitted nor harmed.
• Commensal-the one that gets benefit.
• Host- the one that is neither benefitted nor
harmed.

7. PARASITISM
• One organism is harmed while the other is
benefitted.
• Ectoparasites – parasites that live outside the
body of the host
• Endoparasites – parasites that live inside the
body of the host

8. COMPETITION
• Utilization of the same limited resources by
two or more organisms

9. PREDATION
• One of the participating organism is
benefitted while the other dies
• Predator – animal that eats
• Prey – the one eaten