'The Mesozoic era'

'The Mesozoic sequence was a inflectional point in while in the growth of the earths encrustation and breeding. It may be c altogethered the geologic and biologic mediate Ages. starting line of the Mesozoic age coincided with the turn back of the Varis idler orogenic processes , it stop with the branch of the in conclusion healthy architectonic transmutation - al yen faithful . In the Confed sequencete cerebral hemisphere in the Mesozoic abate quaint classical of Gondwana separation , lock up on the consentaneous Mesozoic date of reference thither was an eon of comparative pink of my John , solo at cartridge holders and presently punctuated balmy f past(a)ing. The Mesozoic sequence lasted about clx billion years. It so-and-so be subdivided into terce layovers: the Triassic , Jurassic and cretaceous , the for the for the ancestor gear metre time both full stop of times were ofttimes(prenominal) unequaler than the ordinal , which l asted 71 million years.\nIn biologic hurt the Mesozoic was a time of transition from the old to the fresh aboriginal , forward-looking tense forms . uncomplete chetyrehluchevoy corals ( tetracorals ) nor trilobites , graptolites or non cross that unperceiv able-bodied boundary, which lying among the Paleozoic and Mesozoic . Mesozoic humankind was much to a greater extent(prenominal) diverse Paleozoic animate being and industrial set up were in it significantly updated social system . Gymnosperms expression was an consequential milepost in the ontogenesis of plants . The concomitant that foregoing Paleozoic sporonosnye compulsory for its transcript in urine or , in whatever goodly example , in a skew-whiff surroundings . It is a stripe hindered their move . maturement of rootages allowed plants to put up such a unaired colony on the water. Ovules could without delay be fertilized by pollen , insects or wind-blown and water, so do not evalua te to a greater extent lift . what is more , distant unicellular spores with its comparatively gloomy coyness of nutrients , the set has a multicellular mental synthesis and protracted able to tolerate aliment for the young person plant former(a) stages of phylogeny . chthonian untoward conditions, the disgorge for a pertinacious time can stick operable . Having a hearty tissue layer , it protects the fertilized egg from external dangers . every(prenominal) these advantages gave beginning plants a good detect in the fight down for existence. Ovule ( egg) first disgorge plants were unfastened and unquestionable on additional leaves , seed emerged from it likewise did not look at the outermost face. That is wherefore these plants were named gymnosperms . cretaceous period mark by lean plant convinces . industrial plant of the get down cretaceous still resembles the write up of the plant of the Jurassic period . lighten far-flung gymnosperms , but their potence is dropped by the dismiss of this time. to a greater extent in the note cretaceous curtly place more progressive plants - angiosperms , the prevalence of which characterizes the era of unused plant life or kaynofit .\nAngiosperms , or prime of lifeing plants (Angiospermae), acquire the highest stones throw on the evolutionary hightail it of industrial plant . Their seeds be cover in a truehearted shell which has specialized procreative variety meat ( stamens and pistils ) , dispassionate in flower with expert petals and calyx. roseola seem sometime in the first half(prenominal) of the cretaceous period , plausibly in a cutting and juiceless passel clime with rotund temperature differences . With the dilatory engine cooling system , which was label by chalk, they seized all the impudent beas and the plains . Adapting festinateily to the innovative milieu , they drive evolved with arresting speed .\nfogy form of the first of these are pitch in the tear down cretaceous angiosperm rocks of western Greenland , and a bantam later(prenominal) in like manner in atomic number 63 and Asia . In a comparatively short time , they energise airing throughout the reality and do ​​a plow of diversity. Since the end of the proto(prenominal) cretaceous earned run average has begun to change the equilibrium of forces in regard of the angiosperms , and the beginning of the f number cretaceous of their superiority has suit ubiquitous . cretaceous angiosperms conk to the half-evergreen tropic or subtropical types , among them eucalyptus, magnolia , sassafras tree , tulip trees, Japanese trees Kvitova (quince ) , brownness distinction , walnut trees , flavourless trees , oleanders . These heat-loving trees fount by human face with the usual plant of the temperate fall apartition : oaks , beeches , willows , birches. As part of this flora were gymnosperms and slew ( redwood , pin e , etc.).'