Key Takeaways Key Points. Community: Communities consist of different populations (groups of organisms of the same species) in a given geographic area. The … :JI ! /Height 233 D A > > D L?2 ...,,, ?+PF%lA w:w7r/e(S(L,R3]1Y7ST/t^4~b7U*r /Subtype/Image What is cellular specialization? Babushka dolls, also known as matryoshka dolls, are a Russian toy. Introduction All life is composed of increasing levels of complexity. The biological levels of organization range from a single organelle all the way up to the biosphere in a highly structured hierarchy. Molecule: Molecules are composed of atoms and are the smallest units of a compound. Describe the hierarchical organization of life. p=j;\aGv-jS}FgPz@dHx/iK�6N;[ 7KJ A. single-celled organism; multicellular organism . 5 years ago. Extremophiles, for example, are organisms that thrive in extreme ecosystems such as salt lakes, hydrothermal vents, and in the stomachs of other organisms. The study of life extends from the microscopic scale of the molecules and cells that make up organisms to the global scale of the entire living planet. A cell is the basic unit of life. This includes areas on the Earth's surface, below the Earth's surface, and in the atmosphere. Molecules. CLEAR AND SIMPLE - Learn how life is organized, from the very small and simple (atom) to the very large and complex (biosphere). In sequence, they are represented as atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms, population, community, ecosystem, biome, and biosphere. Likewise, the circulatory system distributes oxygen that is taken in by the respiratory system. PLAY. To further understand the complexity of life, listed below are the ten levels of biological organization in living organisms listed based on the hierarchy starting with the basic element, cell . 0 0. Test. Biology is the study of life. STUDY. 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