1. Interaction in the Ecosystem

2. Review:
Classify the organisms according to the kingdom
where they belong:
Kingdom Plantae

3. Kingdom Monera

4. Kingdom Fungi

5. Kingdom Protista

6. Kingdom Animalia

7. Objectives:
• Describe how living things interact with
each other;
• Make a chart that shows the
relationship among living things;
• Realize the importance of maintaining
harmonious relationship with each
other.

8. “And so we know and rely on the
love God has for us. God is love.
Whoever lives in love lives in God, and
God in him.”
1 John 4:16

9. Having a good and
harmonious relationship is
important to maintain peace
and order in the society.

10. Relationship among Living Things
• Predation
• Competition
• Cooperation
• Symbiosis
a. Mutualism
b. Parasitism
c. Commensalism

11. Predation
• A stronger organism called the predator eats the
weaker organism called the prey.
Predator
Prey

12. Predator Prey

13. Competition
• Some living things have the same need that is
why they used to fight each other.
Intraspecific
Competition-
involves organisms
of the same
kind/species.

14. Interspecific Competition- involves organisms among
different species. (competition in a community)
Lioness and hyenas fighting for food

15. Cooperation
• Some organisms help one another for higher
chance of survival.
Ants are helping one another to protect and sustain
their colony.

16. Symbiosis
• An interaction that involves two
different kinds of organism, where
one is benefited while the other may
be benefited, harmed or unaffected.
• Examples are mutualism, parasitism
and commensalism.

17. Mutualism
The two organisms are benefited.
Butterfly drinks
nectar from
flowers.Butterfly helps
the flowers in
pollination.

18. Ants protect
aphids from
predator
Aphids give
food to ants.
Ants and Aphids

19. Parasitism
• One organism is benefited (parasite) ,
the other is harmed (host).
Man is the
host.
Leech is the
parasite.

20. Parasitism
Ectoparasitism-
parasites are found
outside the host’s
body
Endoparasitism-
parasites are found
inside the host’s
body

21. Commensalism
One organism is benefited (commensal)
while the other is not affected (host).
Shark is the
host.
Remora is the
commensal.

22. Commensalism
Tree is the
host.
Orchid is the
commensal.

23. Organism A Organism B
Mutualism Benefited Benefited
Parasitism Benefited
(Parasite)
Harmed
(Host)
Commensalism Benefited
(Commensal)
Not Affected
(Host)

24. Mutualism

25. Commensalism

26. Parasitism

27. Competition

28. Predation

29. Cooperation

30. Predation

31. Parasitism

32. Mutualism

33. Cooperation

34. Assignment
• Bring a full-body picture of
yourself, an experiment paper
and pencil