背景知识1：
Weeping sap are plants displaying a natural defense against an insect infestation. Sap, also referred to as resin or sticky pitch, typically flows when insects attempt to enter the tree's bark（树皮）. The sap blocks the hole and often saturates and kills the insect。
Some defensive compounds are produced internally but are released onto the plant’s surface; for example, resins树脂, lignins木质素, silica硅, and wax cover the epidermis表皮 of terrestrial plants and alter the texture质地 of the plant tissue. The leaves of holly plants, for instance, are very smooth and slippery making feeding difficult. Some plants produce gummosis流胶 or sap that traps insects.
Mimicry模仿 and camouflage伪装：Some plants mimic the presence of insect eggs on their leaves, dissuading劝阻 insect species from laying their eggs there. Because female butterflies are less likely to lay their eggs on plants that already have butterfly eggs, some species of neotropical vines of the genus Passiflora (Passion flowers) contain physical structures resembling the yellow eggs of Heliconius butterflies on their leaves, which discourage oviposition by butterflies.[37] 作者: chasedreamv 时间: 2015-5-27 18:58
感谢，可以@一下阅读整理君更新到整理搞，大家都可以看到作者: Barbara-Lei 时间: 2024-12-10 21:45
[md]模考做到这道题了，原文：
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