1. Symbiotic Relationships

2. BIOLOGY STANDARD 2.0: LEARNING EXPECTATION 2.1:
The student will investigate the interactions of organisms within their environment through different relationships, population dynamics, and patterns of behavior.
LEARNING EXPECTATION 2.1:
Compare and contrast the different types of symbiotic relationships.
PERFORMANCE INDICATOR LEVEL 1:
Identify Commensalism, Parasitism, and Mutualism, given a scenario with examples.
Link to TN Curriculum Standards

3. This Standard May Be Difficult To Teach Because…
Mutualism and Commensalism share similar concepts, and can thus be confusing to students.
This may be the first time students are exposed to the three distinct groups of symbiotic relationships.

4. SYMBIOTIC RELATIONSHIPS
1. SYMBIOSIS is the interaction between 2 different organisms living together
HOST- usually the LARGER of the 2 organisms
SYMBIONT- usually the SMALLER member

5. THE THREE SYMBIOTIC RELATIONSHIPS ARE...
Click on a Picture Below to Learn About the Relationship
PARASITISM
MUTUALISM
COMMENSALISM
EXTRA PRACTICE ACTIVITY
GO BACK TO SPECIFIC QUESTION
EXIT

6. PARASITISM - Is a relationship where the Symbiont lives in/on the Host
The Symbiont (or Parasite) BENEFITS and the Host is HARMED.
(For example, the tick (in the picture above) is a
parasite. It benefits by extracting blood from its
human host. The human is harmed because it loses
the blood it needs to stay alive.
EXIT

7. Mutualism
- Is a relationship between the host and a symbiont, where both organisms benefit and NEITHER is harmed.
The relationship can be long or short term.
(For example, (in the photo above) the host flower benefits by being pollinated by the traveling butterfly. The symbiont butterfly benefits from the nectar that it extracts from the flower.)
EXIT

8. COMMENSALISM
- Is a relationship between the host and symbiont, where the symbiont benefits and the host is neither helped nor harmed.
The symbiont benefits by receiving transportation, housing, and/or nutrition.
(For example, (in the photo above) the
symbiont barnacles receive transportation
from the host whale. The host whale is
neither helped nor harmed by the barnacles.
EXIT

9. 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

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

11. Go Back To…

12. 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

13. 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

14. 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

15. 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

16. 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

17. Image Resources www.worldsurface.com
bshary/bsharyr.jpg
image005.jpgcommensalism
lect/lect_11/lect_11.htm
sea-mer/index_e.htm
walke/top-Brazil-1999.html

18. THE END
EXIT