Parasitism is a relationship in which one organism (the parasite) benefits while the other(the host) is harmed. This is a positive, negative relationship. (Campbell)( Dionne L Rice Jr) The parasite usually lives on or inside the other organism. For example, mosquito is a parasite, feeding on a human while transferring the disease called Malaria.
Artificial brush fibres are most commonly made of nylon and polyethylene, though vinyl and steel wire are also used for certain applications. Nylon fibres are either tapered and split like hog bristles for use in paintbrushes or left untapered for making cleaning brushes, hair brushes, and toothbrushes.
Rubber rabbitbrush, or grey rabbitbrush, is a fast growing native shrub. While similar to sagebrush, it grows faster and competes less with forbs and grasses, thus filling an important part of the post-disturbance plant community. True to its name, rubber rabbitbrush can be used to make rubber, but the process is not cost-effective. Compounds in rubber rabbitbrush are still being investigated for medicine and as an insect repellent. American Indians used it to make chewing gum, tea, cough syrup, and yellow dye. The rubbery twigs were used in making baskets.