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the inner most layer of the cortex of roots and some stems of plants.
a relationship between two different organisms, of different species, from which at least one of...
an organic compound that always contains the elements carbon, hydrogen, oxygen and nitrogen and...
energy resources (coal, crude oil and natural gas) derived from the fossilised remains of plants...
an aerobic respiration in animal cells resulting in the formation of lactic acid.
all the different living organisms on the Earth from the smallest micro-organisms to the largest...