united nations organization security council

Species is generally the lowest taxonomic rank representing organisms that are very much closely related to one another. A species is defined as a group of closely related, structurally and functionally similar organisms which can breed among themselves, producing fertile offspr..

Components of the Ecosystem - The environment in which the man and other organisms live is called the biosphere. The biosphere is made up of different regions that have different types of flora (plants) and fauna (animals). The types of organisms in an area are determined by var..

Summary - The modern classification is an extension of the system of classification proposed by Carolus Linnaeus. The present system of classification involves a series of graded taxonomic ranks called taxa which include phylum and family in addition to the four taxa introduced by Linnaeus. The hie..

. Plant respiration and the decomposition of organic matter release more than 10 times the CO 2 released by human activities; but these releases have generally been in balance during the centuries leading up to the industrial revolution with carbon dioxide absorbed by terrestrial vegetati..