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The tree of life or universal tree of life is a metaphor, conceptual model, and research tool used to explore the evolution of life and describe the relationships between organisms, both living and extinct, as described in a famous passage in Charles Darwin's On the Origin of Species (1859). [1]
The tree of life connects the upper world, middle world and underworld. It is also imagined as the "white creator lord" (yryn-al-tojon), [50] thus synonymous with the creator deity, giving rise to different worlds. The world tree or tree of life is an important symbol in Turkic mythology. [51] It is a common motif in carpets.
Various folk cultures and traditions assign symbolic meanings to plants. Although these are no longer commonly understood by populations that are increasingly divorced from their rural traditions, some meanings survive. In addition, these meanings are alluded to in older pictures, songs and writings.
Pacific sea nettles, Chrysaora fuscescens. Cnidaria (/ n ɪ ˈ d ɛər i ə, n aɪ-/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic invertebrates found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.
As with all Cnidarians, these organisms have a complex life cycle including a motile planktonic phase and a later characteristic sessile phase. Hexacorallia also include the significant extinct order of rugose corals.
The cnidae, the explosive cells characteristic of the Cnidaria and used in prey capture and defence, are of a single type, there being nematocysts but no spirocysts or ptychocysts. [4] In contrast, the anthozoan life cycle involves a planula larva which settles and becomes a sessile polyp, which is the adult or sexual phase.
In iconography, Kalpavriksha, the wish-fulfilling tree, is painted within a picture of a landscape, decorated with flowers, silks, and suspended with jewellery. [3] It is a pattern which has a prominent symbolic meaning. [1] Ornamental Kalpavriksha design was a feature that was adopted on the reverse of the coins and sculptures in the Gupta ...
These connections form the junctions of the cnidarian 'central nervous system', which synapse within the rhopalial centers. Rhopalia vary in form, size and number, but ubiquitously consist of specialized structures to sense light ( ocelli ), which line the structure, and regions to perceive gravity ( statoliths ) at their terminal tip. [ 1 ]