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Published byReynard Mathews Modified over 9 years ago
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Characteristics of Life
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All living things share some basic properties Cells Organization Energy Use Homeostasis Growth and Development Reproduction
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Cells Basic unit of life Carry out the functions of life All organisms have 1 or more cells. Human skinPlant leafBacteria
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Cells Unicellular organisms Made of 1 cell Each cell has everything necessary for life Include bacteria and protists
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Cells Multicellular Organisms Made up of many cells Cells have specialized functions within the organism
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Organization Living things are much more complex than anything non-living. More complex molecules, structures organized into groups. Non-living: composed of atoms and/or molecules Living: macromolecules, organelles, cells Protein Cell with many organelles
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Other levels of Organization TISSUEORGANORGAN-SYSTEM
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Energy Use Living things need energy to grow, develop, repair damage, and reproduce Known as metabolism
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Autotrophs vs. Heterotrophs Autotrophs, like plants, can make their own food using the sun’s energy and Earth’s inorganic molecules. Heterotrophs, like the bird that eats fish, consume other organisms.
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Homeostasis Maintain stable internal conditions. Response to the environment. Includes body temperature, blood volume, removal of waste, pH balance, and water balance
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Growth and Development Growth Cells divide to make more cells and the organism gets bigger
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Growth and Development Development Cells take on specific roles (differentiation). Physiological change or change in form may occur.
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Reproduction Pass genetic information (DNA) along to produce more members of a species.
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Reproduction Asexual reproduction A single organism reproduces by itself
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Reproduction Sexual Reproduction 2 different parent organisms contribute genetic information to an offspring
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From what you learned about the characteristics of life: Look at the 2 items at the front of the room. What observations can you make about each item. They will be passed around for you to make these observations. With your partner decide if they have been alive, if they are currently alive, and how we would know based on the characteristics of life. Could we set up an experiment with each to find out?
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