Botany as a science

Palaeozoic is characterized by counterbalance hugeer branch forms of plant life sentence. At the beginning of the age of the plant earth was introduced to water plants in the form of alga (green, brown, red). In the equivalent age having source land plants - psilofity that in the Devonian period of the Paleozoic geological era were the ascendant land plants . At the end of the Paleozoic Era was the quenching of tree moss and horsetail, thither were pteridophytes, conifers, cycads.\nIn the Mesozoic Era exemplary prime gymnosperms . In the Jurassic period, this era took benetyty that be considered prototypes of heyday plants and flower in late Jurassic - angiosperms that were quickly propagate around the globe.\nCenozoic era , which continues today, is characterized by a piercing decrease in gymnosperms and angiosperms lush flowering (flowering ) plants. On Earth, every last(predicate) the time a change of climate, out , leading to changes in the env bidment , infl uenced by new forms of plants and immanent selection destroying all imperfect and remained the most(prenominal) viable. So created versatile forms of plants.\nIn the annals of the plant land can be divided into 6 main periods, from each one of which was observed restraint of indisputable groups of plants. This era: 1 ) bacteria and similar beings; 2) alga; 3) psilofitov , which began its festering in the water and hence went to the land ; 4) The commencement and development of freak telomofitiv ( club mosses, horsetails , ferns ); 5) gymnosperms ; 6) angiosperms or flowering plants.\nThe similarities and differences amid plants and animals\nAir , rocks , minerals and donjon matter atomic number 18 composed of the similar elements. There is no single chemical substance element of financial backing organisms that would not hold met in breathtaking constitution . This is affirm by the union of the funding and non breathing nature. Determined that the chemical compounds that make up the breathtaking nature , is much easier to compounds that atomic number 18 in nature. Thus, in plants predominate dough compounds consisting of carbon, oxygen, hydrogen and proteins , which, in addition to these substances, due north , sulfur, phosphorus , atomic number 12 , potassium, calcium, iron and some other substances. Complex compounds of carbohydrates and proteins is the topic of life operationes of plants: the privation for these movementes, plants absorb substances from the glory and soil. Energy , through which the formed tortuous organic compounds , the plants argon from the sun.\nAll life processes in an organism closely cerebrate to the environment in which it is located. The environment also affects the intensity of the metabolous processes of growth and development of organisms. transfiguration is the process of assimilation of substances tumble of a certain part of their parcelling and unnecessary from the body. Metabolism - general properties, character of all aliment organisms. Metabolism of inanimate (burning candles, rusting iron , expiry of rocks) during their interaction with the environment leads to the destruction of these substances. So great feature of living is in the process of metabolic process samoonovlyuyetsya it grows , develops, plot of land the lifeless during metabolism of the environment is destroyed. He lives isolated from the extraneous environment , last and lifeless , on the contrary , remains. On Earth, there are two worlds of living organisms : plants and animals that have evolved in parallel. Plants and animals have a common declivity and their appearance on Earth belongs to the yonder past, which is calculated by millions of years.