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Acorn 8-bit Microcomputers (cropped) BBC Master AIV
The acorn is the nut of the oaks and their close relatives (genera ''Quercus'', '' Notholithocarpus'' and '' Lithocarpus'', in the family Fagaceae). It usually contains a seedling surrounded by two cotyledons (seedling leaves), enclosed in a tough shell known as the pericarp, and borne in a cup-shaped cupule. Acorns are long and on the fat side. Acorns take between 5 and 24 months (depending on the species) to mature; see the list of ''Quercus'' species for details of oak classification, in which acorn morphology and phenology are important factors. Etymology The word ''acorn'' (earlier ''akerne'', and ''acharn'') is related to the Gothic name ''akran'', which had the sense of "fruit of the unenclosed land". The word was applied to the most important forest produce, that of the oak. Chaucer spoke of "achornes of okes" in the 14th century. By degrees, popular etymology connected the word both with "corn" and "oak-horn", and the spelling changed accordingly. The current ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Robur Acorn - Keila
An oak is a hardwood tree or shrub in the genus ''Quercus'' of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup. The genus is widely distributed in the Northern Hemisphere; it includes some 500 species, both deciduous and evergreen. Fossil oaks date back to the Middle Eocene. Molecular phylogeny shows that the genus is divided into Old World and New World clades, but many oak species hybridise freely, making the genus's history difficult to resolve. Ecologically, oaks are keystone species in habitats from Mediterranean semi-desert to subtropical rainforest. They live in association with many kinds of fungi including truffles. Oaks support more than 950 species of caterpillar, many kinds of gall wasp which form distinctive galls (roundish woody lumps such as the oak apple), and a large number of pests and diseases. Oak leaves and acorns contain enough tannin to be toxic to cattle, but pigs are ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Etymology
Etymology ( ) is the study of the origin and evolution of words—including their constituent units of sound and meaning—across time. In the 21st century a subfield within linguistics, etymology has become a more rigorously scientific study. Most directly tied to historical linguistics, philology, and semiotics, it additionally draws upon comparative semantics, morphology, pragmatics, and phonetics in order to attempt a comprehensive and chronological catalogue of all meanings and changes that a word (and its related parts) carries throughout its history. The origin of any particular word is also known as its ''etymology''. For languages with a long written history, etymologists make use of texts, particularly texts about the language itself, to gather knowledge about how words were used during earlier periods, how they developed in meaning and form, or when and how they entered the language. Etymologists also apply the methods of comparative linguistics to reconstruct in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thorectes Lusitanicus
''Thorectes lusitanicus'' is a medium-sized dung beetle ranging from 30-175 mg in dry body weight. It is flightless with strong Mandible, mandibles that allow it to exploit dry dung. It is native to the southern Iberian Peninsula. It is a tunneller that builds shallow tunnels several meters from the site of a dung deposition and transports the dung into the tunnel. Once the dung is in the tunnel, females of this species lay their eggs within it. ''Thorectes lusitanicus'' is notable for its acorn consumption since researchers previously believed that dung beetles did not consume seeds. In fact, laboratory studies reveal that this unique dung beetle species actually prefers acorns over herbivore dung. Further studies illustrate that acorn consumption leads to many Physiology, physiological and developmental advantages in ''T. lusitanicus'', such as significantly increased fat body development'','' increased resistance to cold temperatures, greater ovary development, and greater resi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
