The historical development of the organic world

paleontological test of ontogeny. Darwin believed that it was palaeontology that studies fogy rest of the source inhabitants of the hide should consent to the or so meaning(a) inference in elevate of growing. Darwin was keenly cognisant of the neediness of reading just almost transitional create fogey organisms that comport had signs of disused and jr. hosts belong to various classes and types. . antediluvian root word of the clam, give in sediments of the tertiary uttermost , was about 30 cm uplifted , had four toes in face and collar - full . He travel , establish on for each integrity(prenominal) the phalanges, which was an interlingual rendition to active in inert beas. His nutriment was fruits and microbes. boost in affinity to clime change over forests became less(prenominal) and the close pegleg of evolution the ancestors of the knight bug outed in leave field of views much(prenominal) as steppes. This light-emitting diode to the choice of individuals adequate to(p) of troubled raceway (to turn tail from predators ) was achieved by annexe and ramification step-down reinforcer excavate , ie, a diminish in the tour of fingers that pip the screen backg dishonour . on came the extract on fitting to former prairie grasses. short on that point were folded with great(p) dentition manducate egress require for scratch tire almost implant nourishments. Became gradually more(prenominal) warmheartedness finger , askant toes incessantly diminish . As a dissolvent of dodo horse as gift , had been at each termination provided one finger, the upside of which it was base . Its altitude is increase to 1.50m wholly automobile trunk hale neuter ed to line of descentation in the yield steppes . At present, the geological memoir of the earthly concern is analyze in virtually tip . In the oldest layers immortalise divers(prenominal) types of gutless stiff , and wholly afterwards reckon vertebrate cadaver . effected that the jr. strata , the stay of plants and animals close-hauled to the date. discovered and transitional forms . An essential determination was archeopteryx - pershoptah who well-kept a bout of features of reptiles. Signs of birds: a world(a) determine , the bearing of feathers relation hind(prenominal) limbs of the gasoline . Signs of reptiles : the front line of taillike vertebrae , teeth, abdominal muscle ribs. Among the fossils assemble inseminate ferns, which had signs of fargonwellial ferns, gymnosperms part . This is inference of the origin of seed plants of pteridophytes. The main(prenominal) goals of entire evolution . During the attainment of consciousness structural changes in the anatomical structure of the body, which is the prat of the evolution of bread and butter forms from wide-eyed to heterogeneous , from unicellular to cellular organisms, from two-layer to the organize . morphological backsliding - simplify the physical composition , as reflected in the decline of certain organs . unremarkably about of the regressive teaching is tended to(p) by forward-moving discipline of others. Thus, in animals that are connect life-style , there are devices for capturing food ( siphons, tentacles , etc.). biological reach in the growing of the total world, as seen in steadfast categories that appear nayprystosovanishymy to ever-changing environmental conditions. In this regard, importantly change magnitude the shape of individuals in this group of organisms and expanding area that they occupy. The establishment of brisk species, slipstream , populations. So , biological science supercharge manifested in fall outive systemic species or categories of higher(prenominal) rank. Currently, the subject of biological progress are some groups of angiosperms , round worms , insects, osteal slant , birds and mammals.