Directions: Choose the letter of the correct answer. Write your answer on the separate sheet of paper. 1. A lichen is a combination of fungus and algae that lives on the sides of trees, rocks, and other materials. The fungus provides the algae with water and minerals and the algae use the water and minerals to make food for both organisms. What type of relationship does the lichen represent? a. Parasitism b. Commensalism c. Mutualism 2. Which of the following in NOT an example of a symbiotic relationship? a. A mother bear caring for her cub b. Worm living in a cow's intestine c. A bacterial infection 3. When a relationship both benefits the organisms, it is an example of: a. Commensalism b. Mutualism c. Parasitism 4. How does a crocodile benefit from a bird eating from its mouth? a. It gets its teeth cleaned b. It gets to eat the bird c. It gets a defense against flies 5. How do bacteria help the human intestines?? a. The bacteria prevents humans from getting sick b. The bacteria help humans to eat a many kinds of foods c. The bacteria helps humans to live longer without eating 6. When a symbiotic relationship benefit one organism and harm another, it is called? a. Commensalism b. Mutualism c. Parasitism 7. The one organism which harmed in a parasitic relationship is called: a. the occupant b.. The parasite pls pasagot po malapit na po solian ​