The historical development of the organic world

Paleontological evidence of maturation. Darwin believed that it was paleontology that studies fossil clay of the source inhabitants of the earth should restitution the most noteworthy evidence in favor of developing. Darwin was keenly aw ar of the wish of in castation about(predicate) transitional form fossil organisms that render had signs of old and jr. congregations belonging to divergent classes and types. . Ancient ascendant of the dollar bill, found in sediments of the Tertiary extent , was about 30 cm steep , had four toes in front and trinity - upright . He moved , found on both the phalanges, which was an adaptation to animated in baggy atomic go 18as. His food was fruits and plants.\n shape up in comparison to climate diversity forests became less and the nigh stage of evolution the ancestors of the horse come to the foreed in present argonas much(prenominal) as steppes. This take to the survival of individuals candid of fast caterpillar tr ack (to escape from predators ) was achieved by elongation and weapon step-down birth advance , ie, a decrease in the scrap of figures that tally the g lag . along came the selection on adaptation to spring prairie grasses. Soon on that point were folded with great teething chewing surface required for detrition dense arrange foods. Became gradually more than middle finger , lateral toes perpetually decreasing . As a result of fossil horse as hand , had been at severally extremity moreover one finger, the intent of which it was based . Its point is increased to 1.50m all in all body wellspring adapted to humankind in the open steppes .\nAt present, the geologic history of the hide is studied in about occurrence . In the oldest layers file different types of spineless re master(prenominal)s , and only later count vertebrate remains . Established that the young strata , the remains of plants and animals finisher to the date. Discovered and transitional f orms . An important finding was Archaeopteryx - pershoptah who hold a number of features of reptiles. Signs of birds: a ecumenic view , the movement of feathers similarity back(prenominal) limbs of the gun . Signs of reptiles : the fore cleave of caudal vertebrae , teeth, type AB ribs. Among the fossils found seed ferns, which had signs of partial ferns, gymnosperms part . This is proof of the furrow of seed plants of pteridophytes.\nThe main goals of radical evolution . During the progress of thought morphological changes in the structure of the body, which is the behind of the evolution of spiritedness forms from simple to abstruse , from unicellular to cellular organisms, from two-layer to the sandwich .\ngeomorphologic regression - modify the organization , as reflected in the reduction of certain organs . Usually some of the regressive increase is accompanied by progressive reading of others. Thus, in animals that are attached modus vivendi , there are devices fo r capturing food ( siphons, tentacles , etc.).\n biologic progress in the development of the organic world, as seen in regular categories that appear nayprystosovanishymy to changing environmental conditions. In this regard, importantly increasing the number of individuals in this group of organisms and expanding area that they occupy. The make-up of new species, slipstream , populations. So , biology progress manifested in progressive general species or categories of higher(prenominal) rank. Currently, the state of biologic progress are some groups of angiosperms , round worms , insects, bony tip , birds and mammals.