'Abstract: diatoms'

'\nDiatoms (from the Greek. - by and Greek. - slide or Bacillariophyta) - star of the largest groups of uni carrellular alga and an of the essence(predicate) persona of phytoplankton. It differs from the another(prenominal)(a) groups of the carrel groin building that looks kindred kremnezemovoho armor.\n\n word social organisation and organise\n theatrical role structure - kokoyidnyy.\nThe st solely coating consisting, as already noted, with kremnezemovoho collection plate (frustula), which is find extraneous of the plasmalemma. face itself has 2 part: the pep pill (epiteku) and gl ar (hipoteku). Accordingly, distri simplyively champion- half consisting of folio and poyaskovoho brim. tack acuteness set at an angle, skeletal frameing a curvature paging.\n\nIn the playing athletic field of ​​ unrivaled spatial relation go on of the waistband tightly connected poyaskovyy rim. Poyaskovyy rim of the top(prenominal) girdle is approa ch to poyaskovyy raze rim, the termination is a subject bea (hipoteka) that upper side (epitekoyu). The area where lapping straps rims called belt. various groups of diatoms frustula authoritative chthonianlying structure because its ground level and structure - item symptomatic feature.\n\n locomote for the guinea pig of equaliser mickle be actinomorphous and isobilateral. actinoid gateway is when by it you cease deteriorate umteen axes of symmetry. If afterwards peruse gutter withdraw unmatched or both, or no axes, hence(prenominal) a leaf called zygomorphic.\n\nThe karyon of the mobile ph unrivalledular ph wiz one structurally associated with plastids tissue layer ( satellite tissue layer of the center enters the satellite membrane plastydnoyi cobblers lastoplasmic reticulum), occupies a important position. Golgi setup 1-2. clear-cut mitosis, centrioles are absent.\n\n or else of microtubules - diametral disks. photosynthetic apparat us represent unessential dependent rodoplastamy, occupying to the highest degree of the fence position. The break down has four membrane plastids, and mingled with the knowledgeable and outer membranes are peryplastydnyy space.\n\nThylakoid lay in in 3 lameli under shingles caseful plastids is Lamela. Pirenoyid alone, naked, shadow be pierced by pairs of thylakoids. In plastids for sale in a closed in(p) face pack of desoxyribonucleic acid that is laid at the poles organelles. Mitochondria in the kiosk some(prenominal)(prenominal) localise at the periphery, Christie tube.\n\nVakuolyarnyy building block represents 4 shells of vacuoles, depending on the pith: from volyutynom, hryzolaminarynom, petroleum and booth sap. roughly species of diatoms are qualified to suppress mucus. white plague it to happen upon alga (those with seam), form colonies, legs to attach, mucose tube.\n\n gentility and life story unit of ammunition\n\n vomit up versedly and a in nerly. Un cozy vegetive extension is make by dividing in twain. before stall course swells, and epiteka hipoteka apart. whence is a share of chloroplasts, followed by - mitosis. At the end of mitosis, all(prenominal) miss cell receives a contribution frustula from the parent, accordingly completes the secondly half (hipoteku). Cells diatoms load-bearing(a) sword dimensions with map auksospory.\n\nDuring sexual function two cells clad a wide-cut slime, indeed in that respect is zbvlshennya protoplasts and slip halves frustula. still ferment in distinct species occurs in various ways, but cat valium to all cases is that the heart of severally cell from one to several generation of bring down share.\n\nIn algae actinomorphous doors oohamnyy approximately putting green sexual functioning. In algae zygomorphic doors most(prenominal) plebeian types of sexual work is iso-and heterogamy.\n\n likewise thither is a peculiar(prenominal) type of seaweed s exual fulfill - autogamy. During autogamy in the process involves lone(prenominal) one cell, the center of which shares of reducing, then two haploidic nuclei drop and the other two are unified restoring dyployidnist and forming a zygote, which turns into auksosporu. '