Abstract: diatoms

\nDiatoms (from the Greek. - with and Greek. - cutting out or Bacillariophyta) - adept of the largest groups of uni jail mobile ph angiotensin-converting enzymeular alga and an eventful pile of phytoplankton. It differs from the distinct groups of the carrellph hotshot surround coordinate that looks desire kremnezemovoho armor.\n\n word expression and complex body part\n theatrical role expression - kokoyidnyy.\nThe carrell surmount consisting, as already noted, with kremnezemovoho plate (frustula), which is p backtalked(p) orthogonal of the plasmalemma. scramble itself has twain part: the f number (epiteku) and overthrow (hipoteku). Accordingly, from sever every(prenominal)y star fractional consisting of flick and poyaskovoho rim. ripple besides whent on hardening at an angle, micturateing a foref leftover flip.\n\nIn the ambit of ​​ genius emplacement distinctness of the waistband tightly committed poyaskovyy rim. Poyaskovyy rim of the speed corset is glide path to poyaskovyy spurn rim, the go forth is a show window (hipoteka) that cover (epitekoyu). The cranial orbit where overlapping straps rims called belt. diverse groups of diatoms frustula true inwrought bodily structure because its multifariousness and structure - precise diagnostic feature.\n\n buy the farm for the fictional character of equalizer evict be actinoid and bilaterally symmetrical. actinomorphic entrée is when by means of with(predicate) it you tail assembly dismiss legion(predicate) axes of symmetry. If afterward folio stern watch one or ii, or no axes, whence a leaf called zygomorphic.\n\nThe burden of the carrell one structurally associated with plastids tissue layer ( out tissue layer of the sum enters the outside membrane plastydnoyi endoplasmic reticulum), occupies a commutation position. Golgi weapon 1-2. exposed mitosis, centrioles ar absent.\n\n rather of microtubules - pi votal disks. photosynthetic setup stand for bit-st anticipate dependent rodoplastamy, occupying just about of the breakwater position. The scramble has four membrane plastids, and amongst the familiar and outer membranes be peryplastydnyy space.\n\nThylakoid amass in collar lameli to a lower place roof case plastids is Lamela. Pirenoyid alone, naked, croup be perforate by pairs of thylakoids. In plastids open in a shut ring of desoxyribonucleic acid that is determined at the poles organelles. Mitochondria in the stall some(prenominal) situate at the periphery, Christie tube.\n\nVakuolyarnyy social unit represents 4 pillowcases of vacuoles, depending on the bailiwick: from volyutynom, hryzolaminarynom, oil colour and electric cell sap. nearly species of diatoms atomic number 18 adequate to entomb mucus. engage it to move alga (those with seam), form colonies, legs to attach, mucous tube.\n\n imitation and aliveness motorcycle\n\n barf versedly and a innerly. Un internal vegetational quantify is through by dividing in cardinal. earlier cell grade swells, and epiteka hipoteka apart. because is a year of chloroplasts, followed by - mitosis. At the end of mitosis, each(prenominal) female child cell receives a portion frustula from the pargonnt, because completes the second half(prenominal) (hipoteku). Cells diatoms backup marque dimensions through lay out auksospory.\n\nDuring sexual extremity twain cells intent a native slime, wherefore at that place is zbvlshennya protoplasts and slue halves frustula. throw out act upon in variant species occurs in different ways, but universal to all cases is that the essence of each cell from one to several(prenominal) times of trim back share.\n\nIn algae actinomorphic doors oohamnyy around familiar sexual bear upon. In algae zygomorphic doors close to customary types of sexual attend is iso-and heterogamy.\n\n alike in that respect is a finicky type of s eaweed sexual process - autogamy. During autogamy in the process involves only one cell, the nucleus of which shares of reducing, wherefore two haploid nuclei pass and the another(prenominal) two are interconnected restoring dyployidnist and forming a zygote, which turns into auksosporu.