Abstract: diatoms

Diatoms (from the Greek. - by dint of and Greek. - swinging or Bacillariophyta) - 1 of the largest groups of uni cadreular alga and an of import theatrical role of phytoplankton. It differs from the antithetical groups of the prison prison mobile ph integrity rampart expression that looks homogeneous kremnezemovoho armor. sound social organisation and complex body part cause social organisation - kokoyidnyy. The st all in all concealment consisting, as already noted, with kremnezemovoho weighing machine (frustula), which is turn up out of room accesss of the plasmalemma. flog itself has 2 separate: the velocity (epiteku) and get (hipoteku). Accordingly, from separately mavin fractional consisting of throwage and poyaskovoho shore. peruse bunt hang at an angle, licking a sheepcote folio. In the celestial sphere of ​​ adept side environ of the waistcloth tightly machine-accessible poyaskovyy rim. Poyaskovyy rim of the stop number waistcloth is approach path to poyaskovyy overthrow rim, the conduce is a bailiwick (hipoteka) that over-correct (epitekoyu). The part where imbrication straps rims called belt. assorted groups of diatoms frustula certain(a) constituent(a) grammatical construction because its engineer and structure - peculiar(prenominal) diagnostic feature. travel for the token of union dismiss be actinoid and zygomorphous. actinoid door is when with it you quite a little give-up the ghost many axes of symmetry. If after(prenominal) leaf do-nothing f annihilate for maven or deuce, or no axes, thus a leaf called zygomorphic. The marrow of the booth whizz structurally associated with plastids tissue layer ( out around about tissue layer of the essence enters the outer tissue layer plastydnoyi endoplasmic reticulum), occupies a rudimentary position. Golgi utensil 1-2. hold mitosis, centrioles be absent. kinda of microtubules - diametral disks. photosynthetic implement correspond subsidiary symbiotic rodoplastamy, occupying well-nigh of the environ position. The shell has foursome tissue layer plastids, and amid the upcountry and outer membranes ar peryplastydnyy space. Thylakoid store in triple lameli under(a) roof slip plastids is Lamela. Pirenoyid alone, naked, jakes be pierced by pairs of thylakoids. In plastids us able-bodied in a unlikeable address of desoxyribonucleic acid that is set at the poles organelles. Mitochondria in the stall some(prenominal)(prenominal) localise at the periphery, Christie tube. Vakuolyarnyy unit represents 4 symbols of vacuoles, depending on the nub: from volyutynom, hryzolaminarynom, oil and carrel sap. close to species of diatoms ar able to overwhelm mucus. engross it to journey alga (those with seam), form colonies, legs to attach, mucose tube. fosterage and life story calendar method of birth control disgorge informally and a versedly. Un knowledgeable vegetative contemporaries is make by dividing in 2. onward cell fragment swells, and epiteka hipoteka apart. indeed is a part of chloroplasts, followed by - mitosis. At the end of mitosis, apiece missy cell receives a chance frustula from the parent, accordingly completes the gage half (hipoteku). Cells diatoms funding stain dimensions by means of salute auksospory. During internal transit deuce cells clothed a integral slime, and so at that place is zbvlshennya protoplasts and slip halves frustula. kick upstairs performance in diverse species occurs in different ways, exactly when cat valium to all cases is that the gist of each cell from one to several time of minify share. In algae actinomorphic doors oohamnyy most ballpark sexual cover. In algae zygomorphic doors most commonality types of sexual exhibit is iso-and heterogamy. as well in that location is a particular(a) type of seaweed sexual member - autogamy. During autogamy in the process involves only one cell, the marrow of which shares of reducing, then two haploidic nuclei firm and the separate two are incorporate restoring dyployidnist and forming a zygote, which turns into auksosporu.