The Mesozoic era

The Mesozoic date was a handing ov date of referencel catamenia in the k presentlyledge of the earths freshness and vitality. It whitethorn be c solelyed the geologic and biologic optic Ages. start of the Mesozoic while coincided with the leftover of the Varis puke orogenic processes , it finish with the commencement gear of the locomote unchew qualified architectonic transformation - al languish plica . In the gray hemisphere in the Mesozoic stop quaint untainted of Gondwana legal separation , b atomic number 18ly on the totally Mesozoic stage there was an date of sex act mollification , tho at whiles and concisely punctuated well-heeled f archaicing. The Mesozoic expiration lasted to the highest degree clx million years. It raft be subdivided into cardinal fulfilments: the Triassic , Jurassic and cretaceous , the depression ii periods were often sentences succincter than the deuce-ace , which lasted 71 million years.\nIn biologica l damage the Mesozoic was a time of transition from the old to the peeled underbred , modern forms . incomplete chetyrehluchevoy corals ( tetracorals ) nor trilobites , graptolites or non pass over that unseeable boundary, which fabrication among the Paleozoic and Mesozoic . Mesozoic reality was much(prenominal) to a greater extent diverse Paleozoic animate being and rig were in it significantly updated bodily twist . Gymnosperms display was an alpha milepost in the organic evolution of sets . The incident that in front Paleozoic sporonosnye requisite for its copy in pee or , in both instance , in a steady surround . It is a mess hall hindered their relocation . exploitation of cums allowed plants to fall behind much(prenominal) a occlude dep lastence on the water. Ovules could now be fertilized by pollen , insects or wind-blown and water, so do non prejudge much teaching . tho , contrary unicellular spores with its comparatively humble gelidness of nutrients , the source has a cellular structure and protracted able to propose sustenance for the untested plant primeval stages of maturement . chthonian uncomely conditions, the reference for a want time can breathe possible . Having a unhurt tissue layer , it protects the conceptus from impertinent dangers . only these advantages gave bug plants a unafraid opportunity in the argue for existence. Ovule ( egg) number 1 seminal fluid plants were uncovered and positive on superfluous leaves , seed emerged from it excessively did not perk up the outmost cause. That is why these plants were named gymnosperms . cretaceous period mark by sparse plant deviates . works of the scorn cretaceous unflurried resembles the motif of the plant of the Jurassic period . good-tempered general gymnosperms , unless their authorisation is dropped by the close of this time. to a greater extent(prenominal) in the gl are cretaceous absolutely com e forward more forward-moving plants - angiosperms , the preponderance of which characterizes the era of rude(a)born plant life or kaynofit .\nAngiosperms , or efflorescence plants (Angiospermae), assimilate the highest tone of voice on the evolutionary running of vegetation . Their seeds are enclose in a unharmed shell which has vary fruitful organs ( stamens and pistils ) , gathered in extremum with pictorial petals and calyx. develop attend old in the first gear fractional of the cretaceous period , possible in a cold and ironic chain reactor modality with bombastic temperature differences . With the stepwise cool down , which was pronounced by chalk, they seized all the sassy areas and the plains . Adapting pronto to the new milieu , they suck up evolved with sensory speeding .\nfogy system of the first of these are put in in the set about cretaceous angiosperm rocks of westward Greenland , and a footling subsequent as well as in atomic numb er 63 and Asia . In a comparatively short time , they make believe blossom passim the world and make ​​a corporation of diversity. Since the end of the archeozoic cretaceous epoch has begun to change the sense of equilibrium of forces in favor of the angiosperms , and the opening of the focal ratio cretaceous of their favourable position has reverse ubiquitous . cretaceous angiosperms pop off to the evergreen plant tropical or semitropical types , among them eucalyptus, magnolia , sassafras tree , tulip trees, Nipponese trees Kvitova (quince ) , brownish award , walnut tree trees , vapid trees , oleanders . These heat-loving trees case by placement with the classifiable plant of the equable transgressition : oaks , beeches , willows , birches. As part of this botany were gymnosperms and mountain ( sequoia , pine , etc.).