Transcription of UNIT 4 - NCERT
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UNIT 4 - NCERT
UNIT 4 The description of structure and variation of living organisms over aperiod of time, ended up as two, apparently irreconcilable perspectiveson biology. The two perspectives essentially rested on two levels oforganisation of life forms and phenomena. One described at organismicand above level of organisation while the second described at cellularand molecular level of organisation. The first resulted in ecology andrelated disciplines. The second resulted in physiology and of physiological processes, in flowering plants as anexample, is what is given in the chapters in this unit.
mineral nutrition of plants, photosynthesis, transport, respiration and ultimately plant growth and development are described in molecular terms but in the context of cellular activities and even at organism level. Wherever appropriate, the relation of the physiological processes to environment is also discussed. PLANT PHYSIOLOGY Chapter 11
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