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During his Italian journey, Goethe formulated a theory of plant metamorphosis in which the archetypal form of the plant is to be found in the leaf – he writes, "from top to bottom a plant is all leaf, united so inseparably with the future bud that one cannot be imagined without the other". [72] In 1790, he published his Metamorphosis of Plants.
A domain contains one or more kingdoms. Intermediate minor rankings are not shown. In biology, a kingdom is the second highest taxonomic rank, just below domain. Kingdoms are divided into smaller groups called phyla (singular phylum). Traditionally, some textbooks from the United States and Canada used a system of six kingdoms (Animalia ...
The number of species of flowering plants is estimated to be in the range of 250,000 to 400,000. [26] [27] [28] This compares to around 12,000 species of moss [29] and 11,000 species of pteridophytes. [30] The APG system seeks to determine the number of families, mostly by molecular phylogenetics. In the 2009 APG III there were 415 families. [31]
Bell Labs [a] is an American industrial research and development (R&D) company credited with the development of radio astronomy, the transistor, the laser, the photovoltaic cell, the charge-coupled device (CCD), information theory, the Unix operating system, and the programming languages B, C, C++, S, SNOBOL, AWK, AMPL, and others.
Unit 731 (Japanese: 731部隊, Hepburn: Nana-san-ichi Butai), [note 1] short for Manchu Detachment 731 and also known as the Kamo Detachment [3]: 198 and the Ishii Unit, [5] was a covert biological and chemical warfare research and development unit of the Imperial Japanese Army that engaged in lethal human experimentation and biological weapons manufacturing during the Second Sino-Japanese War ...
Permaculture is a philosophy of working with, rather than against nature; of protracted and thoughtful observation rather than protracted and thoughtless labor; and of looking at plants and animals in all their functions, rather than treating any area as a single product system. [20] — Bill Mollison.
Salem State University [132] is the largest of the nine schools comprising the state university system in Massachusetts (the five University of Massachusetts campuses are a separate system), with 7,500 undergraduates and 2,500 graduate students; [133] its five campuses encompass 115 acres (0.47 km 2) and include 33 buildings. The Salem State ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 23 September 2024. Discrepancy between lack of evidence of advanced alien life and apparently high likelihood it exists This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is ...