[ 201 ] Life Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • The pea crab lives in the mantle cavity of mollusks, oysters, sea urchins, or sand dollars, using the host for oxygen, protection, and a source of food. These tiny crabs ingest food that is part of the host’s diet and often may feed on the mucous strings that help carry the food to the host’s mouth, damaging them. This is an example of ___________. • parasitism • commensalism • mutualism Gymnosporangium is a genus of fungus that first grows on juniper trees and has its spores grow on fruit trees. As those spores grow on the fruit trees, they cause a loss in fruit production, damaging the reproduction of the trees. This is an example of ___________. • parasitism • commensalism • mutualism Schistosoma is a genus of fluke or flatworm commonly known as a blood fluke. This flatworm lives within the blood vessels of humans and is the major cause of a group of infections known as schistosomiasis, which can lead to internal organ damage and infertility. This is an example of ___________. • parasitism • commensalism • mutualism