Plant defense against herbivory which differ from one another in both functional groups, and in basic carbon skeletons. Monoterpenoids, continuing 2 isoprene units, are volatile essential oils such as citronella, limonene, menthol, camphor, and pinene. Diterpenoids, 4 isoprene units, are widely distributed in latex and resins, and can be quite toxic. Diterpenes are responsible for making "Rhododendron" leaves poisonous. Plant steroids and sterols are also produced from terpenoid precursors, including vitamin D, glycosides (such as digitalis) and saponins (which lyse red blood cells of herbivores). Phenolics, sometimes called "phenols", consist of an aromatic 6-carbon ring bonded to a hydroxy group. Some phenols have antiseptic
Nothing comes from nothing a relationship between Maria's theological acumen and this song is accidental or intentional. In the web television series "13 Reasons Why", Ryan Shaver uses this Latin phrase to show Hannah Baker, the main character, that her attempts to write poetry will be useless if she's not willing to put her soul on them, as she is afraid of expressing her most intimate thoughts with strangers. The phrase also appears in H.P. Lovecraft's tale, "The Whisperer in Darkness". Nothing comes from nothing Nothing comes from nothing () is a philosophical expression of a thesis first argued by Parmenides. It is associated