1 Place the insertion point where you want the cross-reference to appear. 2  On the Insert menu, click Cross-reference. 3  In the Reference type list, select Footnote or Endnote. 4  Select the footnote or endnote that you want to refer to, and then click Insert.ow to Create Multiple References to the Same Footnote. 1  Place the insertion point where you want the cross-reference to appear. 2  On the Insert menu, click Cross-reference. 3  In the Reference type list, select Footnote or Endnote.
â¢ Parasitism: a relationship in which one species benefits while the other is harmed. â¢ Commensalism: a relationship in which one species benefits but the other species is neither harmed nor helped. We often represent mutualism with a â+/+â because both species receive a posi - tive benefit. Commensalism is shown as a â+/0â relationship because one species
However, there are types of symbiosis that are not beneficial and may in fact harm one or both of the species. Symbiotic relationships can be obligate or facultative. Obligate symbiosis is when two organisms are in a symbiotic relationship because they can't survive without each other.owever, there are types of symbiosis that are not beneficial and may in fact harm one or both of the species. Symbiotic relationships can be obligate or facultative. Obligate symbiosis is when two organisms are in a symbiotic relationship because they can't survive without each other.