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The idea of a tree of life arose from ancient notions of a ladder-like progression from lower into higher forms of life (such as in the Great Chain of Being).Early representations of "branching" phylogenetic trees include a "paleontological chart" showing the geological relationships among plants and animals in the book Elementary Geology, by Edward Hitchcock (first edition: 1840).
Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...
The blue and orange subgroups are clades, each defined by a common ancestor stem at the base of its respective subgroup branch. The green subgroup alone, however, is not a clade; it is a paraphyletic group relative to the blue subgroup because it excludes the blue branch, which shares the same common ancestor. Together, the green and blue ...
Cass Street Park is a series of large scale painted fiberglass sculptures designed to enhance a small park in the Brady Street neighborhood of Milwaukee. Elements include a cat-shaped gateway arch, a dragon, two light poles and a bird. All of the forms are painted in bright colors, adding to the whimsical feel of the site. [2]
A San Diego-based ecotour operator has captured stunning aerial footage, perhaps first of its kind, showing Cuvier’s beaked whales swimming along the surface. Rare footage shows elusive ...
The Windy Whales: Chicago, Illinois: September 22, 1997: New construction has covered all but a sliver of wall. Signature still visible but not much else. 74: Orcas Passage: Indianapolis, Indiana: September 29, 1997 75: Song of the Whales: Cleveland, Ohio: October 6, 1997. Restoration completed and wall rededicated October 4, 2019 [15] 76 ...
A tree structure, tree diagram, or tree model is a way of representing the hierarchical nature of a structure in a graphical form. It is named a "tree structure" because the classic representation resembles a tree , although the chart is generally upside down compared to a biological tree, with the "stem" at the top and the "leaves" at the bottom.
Tree and plants branches of several sizes The branches of this dead camel thorn tree within Sossusvlei are clearly visible The branches and leaves of a tree Looking up into the branch structure of a Pinus sylvestris tree Leafless tree branches during winter. A branch, also called a ramus in botany, is a stem that grows off from another stem, or ...