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
Read's Drug Store two walls; preservationists argued that both plans were insufficient. Activists want the building preserved and turned into a civil rights museum. They accuse the city of "demolition by neglect": avoiding minor repairs and allowing the building to collapse in order to make room for development. Support for preserving the building comes from Baltimore Heritage, a non-profit historical preservation group, and the Jewish Museum of Maryland, which celebrates the Nattans' decision to desegregate early. Read's Drug Store Read's Drug Store was a chain of stores based in Baltimore, Maryland. Read's Drug Store was founded by William Read. He sold it to