Understanding The Levels Of Biological Organization

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The Scope of Biology Define the levels of biological organization from molecules to the biosphere, noting the relationship each level has to the others. Atoms are defined as the smallest unit or the basic building blocks of matter which make up all objects. Atoms are made up of equal number of protons and electrons. The term 'organelle ' means little organs and it is a specialized part of a cell. Examples are the nucleus, endoplasmic reticulum, mitochondria, etc. All living organisms in the biological organization consist of structural and functional units called cells; they are the smallest living organisms in the world. For example, bacteria A group of cells which may or may not have similar characteristics is termed as a tissue. Each tissue is attributed with a particular set of functions in the body of the living organism. -Organ Now when the different types of tissues are organized or grouped together, they form what is known as an organ. These tissues enable a particular organ to carry out its own specific task. Examples are heart -Organ System An organ system consists of a groups of organs which are meant for performing a broad set of functions, particularly in multi-cellular organisms. A number of organs in a system work together as a single unit. For example, the circulatory system works with the help of heart, blood and blood vessels. -Organism Plants, animals, humans, bacterium, etc., and any form of life is known as an organism. It can be regarded as the
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