* life processes depend on ____ whose structure is related to their ____ . The fundamental units of living organisms are cells, which may be part of highly adapted structures including ____, organs and organ ____, enabling living processes to be performed effectively * * living organisms may form populations of single species, ____ of many species and ecosystems, interacting with each other, with the environment and with humans in many different ways. Living organisms are interdependent and show ____ to their environment * * life on Earth is dependent on ____ in which green plants and ____ trap light from the Sun to fix ____ and combine it with hydrogen from water to make organic compounds and oxygen. Organic compounds are used as fuels in cellular ____ to allow the other chemical reactions necessary for life. The chemicals in ecosystems are continually ____ through the natural world * * the characteristics of a living organism are influenced by its ____ and its interaction with the environment. Evolution occurs by a process of ____ and accounts both for biodiversity and how organisms are all related to varying degrees.

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