[ 241 ] Life Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • What is the term for the maximum population size that an environment can sustain? Read the description of a symbiotic relationship and select the correct term for the relationship from the following list. Mistletoe attaches to spruce trees. Using specialized structures, mistletoe penetrates into and extracts water and nutrients from the tree’s branches. • commensalism • mutualism • parasitism Read the description of a symbiotic relationship and select the correct term for the relationship from the following list. E. coli bacteria live within the intestinal tract of humans, obtaining nutrients from the food particles that pass through the intestines. Vitamin K produced by the E. coli is absorbed through the intestinal walls for use in the human body. • commensalism • mutualism • parasitism