1. Interactions among Organisms

2. Types of Interactions
Intraspecific relationship – organisms of the same species interact with one another
Interspecific relationship – the interaction is between species of different kind

3. Determine whether the following picture/s shows an intraspecific relationship or an interspecific relationship

10. Beneficial or Harmful Relationships

11. Symbiosis
Living Together

12. Symbiosis Means living together Symbiotic relationship may be
Mutualism
Commensalism
Parasitism

13. Mutualism
Kind of relationship where two organisms benefit from each other
Examples are…

17. Continuous Association

18. Transitory Association

19. Commensalism
A relationship in which one species benefits while the other is neither benefited nor harmed
Commensal – the organism that benefits
Host – the organism which is neither harmed nor benefited
Examples are…

21. Barnacles and Whales
Barnacles need a place to anchor. They must wait for food to come their way. Some barnacles hitch a ride on unsuspecting whales who deliver them to a food source. This does not effect the whale in any way.

22. Shark & Remora
The remora attaches itself to the shark and saves energy since it doesn’t have to swim, and it gets to snack on the sharks kills. The shark doesn’t get anything.

23. Parasitism
A type of relationship where one organism benefited while the other organism is harmed
Parasite – the organism that is benefited
Two kinds of parasites : internal and external
Host – the organism that is harmed and it is also where the parasite lives
Examples are…

24. Loa Loa Worm & Human
This worm infects the human blood stream and gets a nice warm safe home there. The human may go blind or have other complications as a result.

25. Tapeworms
The definitive host of the cucumber tapeworm is a dog or a cat (occasionally a human). Fleas and lice are the intermediate host. the dog or cat becomes contaminated when the eggs are passed in the feces, and the flea or louse ingests the eggs.  The dog or cat (or human) is infected when they ingest a flea or louse.  Hence the importance of controlling fleas on your pet!

26. Bedbugs
Bedbugs are small, nocturnal parasites that come out of hiding at night to feed on unsuspecting humans.  They feed exclusively on blood!  Their bites often result in an allergic reaction.

27. EXTRA PRACTICE ACTIVITY
In the following activity, you will be given a picture scenario. Identify and select the symbiotic relationship (parasitism, mutualism, or commensalism) represented in the picture.
EXIT

28. SLIDE NAVIGATION INSTRUCTIONS
ADVANCE TO NEXT SLIDE
RETURN TO PREVIOUS SLIDE
GET HELP, DEFINITION
QUIT ACTIVITY
EXIT

29. In this photo the “cleaner fish” receives nourishment by dining off of the parasites and remaining food debris in the eel’s mouth. Is this an example of…
PARASITISM
MUTUALISM
COMMENSALISM
HELP
EXIT

30. That’s CORRECT! Keep up the great work!
EXIT

31. SORRY MAN, TRY AGAIN
SORRY MAN, TRY AGAIN
EXIT

32. PARASITISM MUTUALISM COMMENSALISM HELP EXIT
Clownfish are frequently found in the tentacles of sea anemones. Sea anemones capture their prey by paralyzing them with their tentacles. However, the clownfish produces a mucus that prevents the tentacles from harming it. By dwelling amongst the tentacles the clownfish receives a protected home. This relationship is an example of …
PARASITISM
MUTUALISM
COMMENSALISM
HELP
EXIT

33. SORRY MAN, TRY AGAIN
EXIT

34. That’s CORRECT! Keep up the great work!
EXIT

35. The birds in the picture are munching on tiny parasitic insects located on the rhino. The relationship between the birds and the rhino is an example of…
PARASITISM
MUTUALISM
COMMENSALISM
HELP
EXIT

36. SORRY MAN, TRY AGAIN
EXIT

37. That’s CORRECT! Keep up the great work!
EXIT

38. PARASITISM MUTUALISM COMMENSALISM EXIT
Lampreys are primitive fish with limited digestive systems. They attach to and feed on the body fluids of fish with more advanced digestive systems, often leading to the death of the host fish. This relationship is an example of…
PARASITISM
MUTUALISM
COMMENSALISM
HELP
EXIT

39. SORRY MAN, TRY AGAIN
SORRY MAN, TRY AGAIN
EXIT

40. That’s CORRECT! Keep up the great work!
EXIT

41. PARASITISM MUTUALISM COMMENSALISM EXIT
Orchids grow on the branches of high trees. These orchids get more water and sunlight than those on the ground. The tree is unaffected by the orchid’s presence. This relationship is an example of…
PARASITISM
MUTUALISM
COMMENSALISM
EXIT
HELP

42. SORRY MAN, TRY AGAIN
SORRY MAN, TRY AGAIN
EXIT

43. That’s CORRECT! Keep up the great work!