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![]() sabinjacob105 Offline | Posted on : 05:11:11 PM on February 10, 2012 reprodection in angiosperm |
![]() Rohit Offline | Posted on : 06:39:41 PM on February 14, 2012 Among all living organisms, flowers, which are the reproductive units of angiosperms, are the most varied physically and show the greatest diversity in methods of reproduction of all biological systems. Carolus Linnaeus (1735 and 1753) proposed a system of classification of flowering plants based on plant structures, since plants employ many different morphological adaptations involving sexual reproduction, flowers played an important role in that classification system. Later on Christian Konrad Sprengel (1793) studied plant sexuality and called it the "revealed secret of nature" and for the first time it was understood that the pollination process involved both biotic and abiotic interactions (Charles Darwin's theories of natural selection utilized this work to promote his idea of evolution). Plants that are not flowering plants (green alga, mosses, liverworts, hornworts, ferns and gymnosperms such as conifers) also have complex interplays between morphological adaptation and environmental factors in their sexual reproduction. The breeding system, or how the sperm from one plant fertilizes the ovum of another, is the single most important determinant of the mating structure of nonclonal plant populations. The mating structure or morphology of the flower parts and their arrangement on the plant in turn controls the amount and distribution of genetic variation, a central element in the evolutionary process. |
![]() sabinjacob105 Offline | Posted on : 06:25:51 PM on February 17, 2012 what is the vegitative reproduction method in mint banana terror of bungal The seed which shows greater seed dormancy |
![]() Rohit Offline | Posted on : 04:16:35 PM on February 20, 2012 please , write your question proper in sequence? |







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