Name:

TYPES OF SYMBIOSISThere are 3 basic types of symbiosis. Don't forget that symbiosis is the relationship between two organisms ofdifferent species that benefits one or both organisms.

M- Mutualism- a symbiotic relationship that benefits both organisms involved.

C- Commensalism- a symbiotic relationship that benefits one organism and the other is not helped orharmed.

P- Parasitism- a symbiotic relationship that benefits one organism and the other is harmed.

Directions: Put the letter (M,C,P) by the statement that best describes the type of symbiosis.

1. A tick living on a dog.2. The honeyguide bird leading the honey badger to the bees hive, both eat the honey.3. A tapeworm living in a 6th grade students intestines.4. A bird building their nest in a tree.5. The hermit crab carrying the sea anemone on its back.6. The bristle worm living with the hermit crab.7. Head lice living on a human scalp.8. Mistletoe putting its roots into its host tree.9. The ants and the acacia tree living together and both receiving benefit.10. The egret, an insect eating bird, graze near some herbivores mouth.11. Orchids growing in tall tropical trees, the trees are not harmed but the orchids get

sunlight.12. Bacteria living on a humans skin.

_13. The remora hitching a ride on a shark.14. Barnacles living on a whale.

_15. Bees and a flower.16. Bacteria living in the intestines of a cow to help it break down cellulose.

_17. The clownfish and the sea anenemoe.18. A sixth grader and their pet.

_19. The Rhino and the tick bird.20. The lichen- a close relationship of a fungus and an alga that benefits both.

Living Environment (Ecology Worksheet # 2) NameSymbiotic Relationships

Correctly complete the following statements.

1. The place an organism lives is called its

2. This is a symbiotic relationship between organisms where both are helped (+,+)This relationship is called .

3. This is a symbiotic relationship between organisms where one organism is helped,while the other is harmed. (+,-) This relationship is called .

4. This is a symbiotic relationship between organisms where one organism is helped,while the other it is associated with is basically unaffected. (+, 0) This relationshipis called .

In questions 6 through 8, select the term from the list below that is most closely associated withthe following statement.

List of terms: (1.) parasitism (2.) commensal ism (3.) mutualism (4.) decomposers•(5.) competition

6. The roots of a mistletoe plant absorb nutrients from living oak trees, causing somedamage to the tissues of the trees.

7. Protozoans living in the intestine of a termite secrete enzymes that digest cellulose,providing digestive end products of value to both organisms.

8. Certain fungi use dead organic matter for food.

9.. The relationship between fleas and a dog is most similar to the relationship between(1.) honeybees and flower (2.) orchids and a tree (3.) nitrogen-fixing bacteria anda legume (4.) athlete's food fungus and a human

10. The American dogwood, a flowering tree of New York State's woodlands, has beenattacked by a fungal disease specific to this tree species. Many dogwoods have diedbecause fungicides have not proven effective in fighting the spread of thisdisease. Which term best describes the relationship between the dogwoodtrees and the fungus? (1.) parasitism (2.) mutualism (3.) commensalism(4.) saprophytism

11 A symbiotic relationship exists between two organisms of different species. If onlyone organism benefits from the relationship and the other is not harmed, therelationship is known as (1.) mutualism (2.) commensalism (3.) parasitism(4.) saprophytism