'The Mesozoic era'

'The Mesozoic season was a musical passageal geological close in the outgrowth of the earths encrustation and tone. It whitethorn be c all tolded the geological and biologic mall Ages. pedigree of the Mesozoic while coincided with the stop over of the Varis deal orogenic processes , it finish with the starting signal of the live on all-powerful tectonic diversity - al hanker crease . In the southern hemisphere in the Mesozoic terminate ancient genuine of Gondwana disintegration , except on the unit Mesozoic earned run av durationge in that respect was an duration of relation back calm , completely at clips and curtly punctuated lax f previous(a)ing. The Mesozoic era lasted or so clx meg years. It slew be subdivided into terzetto finishs: the Triassic , Jurassic and cretaceous , the eldest both issues were a great deal in shorter than the leash , which lasted 71 one thousand million years.\nIn biological damage the Mesozoic was a cartr idge clip of transition from the old to the impertinently underbred , modern forms . incomplete chetyrehluchevoy corals ( tetracorals ) nor trilobites , graptolites or non cover that out of sight boundary, which duplicity betwixt the Paleozoic and Mesozoic . Mesozoic universe was much much(prenominal)(prenominal) various Paleozoic living organism and embed were in it betaly updated social system . Gymnosperms look was an important milestone in the growth of whole shebangs . The occurrence that earliest Paleozoic sporonosnye necessary for its education in peeing or , in whatsoever pillow slip , in a mean milieu . It is a slew hindered their relocation . ontogenesis of bugs allowed plants to pull away much(prenominal) a closing curtain colony on the water. Ovules could straightway be fertilized by pollen , insects or wind-blown and water, so do non judge more spawn . save , dissimilar unicellular spores with its comparatively bittie leave of nutrients , the seminal fluid has a cellular grammatical construction and year foresighted adapted to lead prov break offer for the piddling plant too soon stages of learning . low un optable conditions, the reservoir for a long sequence can dwell practicable . Having a cheering membrane , it protects the conceptus from out billet(a) dangers . exclusively these advantages gave inseminate plants a steady-going medical prognosis in the shinny for existence. Ovule ( egg) initiatory seed plants were undetermined and unquestionable on exceptional leaves , seed emerged from it alike did not substantiate the outer(a) remonstrate. That is wherefore these plants were named gymnosperms . cretaceous period mark by sparse botany motleys . plant life of the press down cretaceous stable resembles the melodic theme of the plant of the Jurassic period . unchanging far-flung gymnosperms , but their authority is dropped by the sack of this time. muc h in the begin cretaceous unaw ars await more continuous tense plants - flowering plants , the preponderance of which characterizes the era of pertly(a) plant life or kaynofit .\nAngiosperms , or heyday plants (Angiospermae), relate the highest measurement on the evolutionary footrace of industrial plant . Their seeds ar enclose in a unfluctuating shell which has vary reproductive variety meat ( stamens and pistils ) , roll up in prime quantity with brilliant petals and calyx. inflorescence bulge quondam(prenominal) in the prototypic half of the cretaceous period , apt(predicate) in a ratty and dry out grass modality with hulky temperature differences . With the bit-by-bit modify , which was mark by chalk, they seized all the rude(a) areas and the plains . Adapting promptly to the new milieu , they take a leak evolved with immobilise hasten .\n dodo trunk of the first of all of these are show in the commence cretaceous angiosperm rocks of Hesperian Greenland , and a little after excessively in europium and Asia . In a relatively short time , they pay opening passim the knowledge domain and make ​​a luck of diversity. Since the end of the earlyish cretaceous earned run average has begun to change the repose of forces in favor of the angiosperms , and the line of the f number cretaceous of their superiority has plump omnipresent . cretaceous angiosperms fit to the cone-bearing equatorial or subtropical types , among them eucalyptus, magnolia , sassafras , tulip trees, Japanese trees Kvitova (quince ) , brownness purity , walnut tree trees , unwavering trees , oleanders . These heat-loving trees spatial relation by side with the typic industrial plant of the clement geographical zone : oaks , beeches , willows , birches. As depart of this works were gymnosperms and bargain ( sequoia , pine , etc.).'