کتاب english for the students of forest science and engineering یوسف عرفانی فرد نشر مرکز نشر دانشگاهی

abiotic adjective pertaining to the nonliving parts of an ecosystem, such as soil particles, bedrock, air, water aerobic adjective 1. occurring in the presence of free oxygen, 2. growing or occurring only in the presence of molecular oxygen biotic adjective pertaining to living organisms and their ecological and physiological relations catabolism noun the breaking down of complex chemicals into simple chemicals cellulose noun a straight-chain polymer built up of a large number of glucose anhydride molecules with the empirical formula of (C6H1۰O5)n decay noun a process by which tissues become rotten and decompose, caused by the action of microorganisms and oxygen decomposer noun consumers, mostly bacteria and fungi, which break up complex organic substances of dead matter. Some of the decomposition products are taken into the organism’s own protoplasm and the remainder becomes available to consumers decomposition noun a large number of interrelated processes by which organic matter is broken down to smaller particles and soluble forms available for plants