title: The natural history of consciousness, and the question of whether plants are conscious, in relation to the Hameroff-Penrose quantum-physical 'Orch OR' theory of universal consciousness.
authors.affiliation: School of Biological Sciences; University of Bristol ; Bristol Life Sciences Building ; Bristol, UK.
authors.forename: Peter W
authors.initials: PW
authors.lastname: Barlow
keywords: action potentials; consciousness; microtubules; neurons; orch OR hypothesis; passage of time; plants; primary perception; protoconsciousness; ray cells