Nitella Opaca

	Nitella Opaca ''Nitella opaca'' is a species of algae in the family Characeae. Description ''Nitella opaca'' is a dioecious Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproductio ... species very similar to ''Nitella flexilis'' and difficult to distinguish from it.Guiry, M.D., John, D.M. Rindi, F. and McCarthy, T.K. (ed) 2007 ''New Survey of Clare Island. Volume 6: The Freshwater and Terrestrial Algae''. Royal Irish Academy. Distribution ''Nitella opaca'' has been observed in fresh waters, mostly lakes. Can be found up to 12 m deep. M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 May 2018. Etymology From the Latin adjective , meaning "opaque", "not shining". References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Whitchurch Canal Whitchurch may refer to: Places Canada Whitchurch, Ontario, since 1971 part of Whitchurch-Stouffville, Ontario England Whitchurch, Bristol Whitchurch, Buckinghamshire Whitchurch, Devon, in Tavistock ** Whitchurch, Devon (parish), a civil parish in Devon Whitchurch, Hampshire Whitchurch, Herefordshire Whitchurch, Middlesex, a former name for Little Stanmore Whitchurch, Shropshire Whitchurch, Warwickshire Whitchurch Canonicorum, Dorset Whitchurch-on-Thames, Oxfordshire Wales Whitchurch, Cardiff, Wales Whitchurch, Pembrokeshire, near St. David's Whitchurch-by-Cardigan, Pembrokeshire (usually called Eglwyswen) People Aaron Whitchurch (born 1992), Australian rugby league player Ernie Whitchurch (1891–1957), English footballer Harry Frederick Whitchurch (1866–1907), English soldier Philip Whitchurch (born 1951), British actor See also Whitchurch (UK Parliament constituency) Whitchurch railway station (other) Whitchurch Rural District (disa ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Algae Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as ''Chlorella,'' ''Prototheca'' and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to in length. Most are aquatic and autotrophic (they generate food internally) and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem that are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the ''Charophyta'', a division of green algae which includes, for example, ''Spirogyra'' and stoneworts. No definition of algae is generally accepted. One definition is that algae "have chlorophyll ''a'' as their primary photosynthetic pigment and lack a sterile covering of cells around thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Characeae Characeae is a family of freshwater green algae in the order Charales, commonly known as stoneworts. They are also known as brittleworts or skunkweed, from the fragility of their lime-encrusted stems, and from the foul odor these produce when stepped on. In some treatments, the Characeae includes all the living (extant) species of Charales; this circumscription is followed here. In other treatments, the genus ''Nitellopsis'', which has both extant and extinct species, is placed in a separate family, Feistiellaceae. Description Living members of the Characeae ''sensu lato'' grow in freshwater and brackish environments worldwide, and have large, macroscopic thalli growing up to 120 cm long, they are branched, multicellular, and use chlorophyll to photosynthesize. Their only diploid stage in the life cycle is the unicellular oospore. They may be called ''stoneworts'', because the plants can become encrusted in lime ( calcium carbonate) after some time. The "stem" is actually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Dioecious Dioecy (; ; adj. dioecious , ) is a characteristic of a species, meaning that it has distinct individual organisms (unisexual) that produce male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproduction is biparental reproduction. Dioecy has costs, since only about half the population directly produces offspring. It is one method for excluding self-fertilization and promoting allogamy (outcrossing), and thus tends to reduce the expression of recessive deleterious mutations present in a population. Plants have several other methods of preventing self-fertilization including, for example, dichogamy, herkogamy, and self-incompatibility. Dioecy is a dimorphic sexual system, alongside gynodioecy and androdioecy. In zoology In zoology, dioecious species may be opposed to hermaphroditic species, meaning that an individual is either male or female, in which case the synonym gonochory is more often used. Most animal species are dioecious (gon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]