Match each description to the type of relationship it represents. tiles *facultative parasitism *obligate parasitism *commensalism *predator and prey pairs *a freshwater amoeba feeds on bacteria in the water. *armillaria fungi grow within a tree's roots, causing the tree to rot, but will survive if the tree dies. *a pseudoscorpion, a type of arthropod, hides under a beetle's wings for protection and transportation, but does not affect the beetle. *rickettsia bacteria can only survive in eukaryotic cells, which are destroyed when the bacteria replicates

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.