[ 199 ] Life Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • African oxpeckers feed on the insects that are on the backs of zebras and other large African animals. This is an example of which of the following symbiotic relationships? • parasitism • mutualism • commensalism Lice feed on the skin and blood of the host. This is an example of which of the following symbiotic relationships? • parasitism • mutualism • commensalism Some spiders build their webs on blades of grass. This is an example of which of the following symbiotic relationships? • parasitism • mutualism • commensalism