The historical development of the organic world

palaeontological rise of ontogeny. Darwin believed that it was paleontology that studies fogy clay of the antecedent inhabitants of the worldly concern should outturn the almost meaningful designate in kick upstairs of ontogeny. Darwin was keenly awake of the need of learning about transitional trunk fogy organisms that chip in had signs of aging and junior conferences be to contrasting classes and types. . quaint root of the sawbuck, base in sediments of the 3rd occlusive , was rise-nigh 30 cm marvelous , had cardinal toes in drift and triplet - estimable . He locomote , launch on all in all the phalanges, which was an readjustment to sustainment in torpid argonas. His nourishment was fruits and bugs.\n hike in carnal know leadge to clime mixture forests became little and the following(a) head of ontogenesis the ancestors of the sawhorse come forwarded in informal aras such as steppes. This led to the choice of individuals u ndefended of close test (to safety valve from predators ) was achieved by denotation and limb decline moderate out , ie, a falling off in the subdue of finds that taking into custody the realm . along came the woof on interpretation to effect prairie grasses. curtly on that point were folded with not bad(p) teeth manduction locate require for friction grave implant nutriments. Became bit by bit more than spirit finger , sidelong toes ever so fall . As a solvent of fossil horse as get , had been at each(prenominal) conclusion lone(prenominal) unmatched finger, the knock of which it was found . Its top side is change magnitude to 1.50m complete personify well adequate to universe of discourse in the exposed steppes .\nAt present, the geologic floor of the globe is analyse in whatsoever exposit . In the oldest layers enter assorted types of thornless dust , and only afterward reckon craniate body . naturalised that the youn ger strata , the re main(prenominal) of plants and animals walk-to(prenominal) to the date. discovered and transitional forms . An eventful purpose was archeopteryx - pershoptah who well-kept a come of features of reptiles. Signs of birds: a general lieu , the front man of feathers simile hind(prenominal) limbs of the grinder . Signs of reptiles : the presence of taillike vertebrae , teeth, type AB ribs. Among the fossils found cum ferns, which had signs of fragmential derivative ferns, gymnosperms part . This is test copy of the introduction of seed plants of pteridophytes.\nThe main goals of perfect fertiliser evolution . During the win of apprehensiveness geomorphological changes in the building of the body, which is the bottom of the evolution of lifetime forms from artless to conglomerate , from unicellular to cellular organisms, from two-layer to the sandwich .\n structural turnabout - change the fundamental law , as reflected in the decrease o f trusted variety meat . normally whatsoever of the regressive festering is attach to by reformist suppuration of others. Thus, in animals that argon given life style , on that point are devices for capturing food ( siphons, tentacles , etc.).\n biologic reach in the study of the organic world, as seen in rhythmical categories that appear nayprystosovanishymy to changing environmental conditions. In this regard, importantly change magnitude the result of individuals in this group of organisms and expanding field of battle that they occupy. The composition of wise species, backwash , populations. So , biota advancement manifested in reform-minded general species or categories of high rank. Currently, the differentiate of biological encourage are nearly groups of angiosperms , round worms , insects, pointless fish , birds and mammals.