Characteristics of Living Things Section 1 Bellringer What are four living and nonliving things that you interact with every day? How do you know whether.
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Characteristics of Living ThingsSection 1
Bellringer
What are four living and nonliving things that you interact with every day? How do you know whether each is living or nonliving? Do you know what the word inanimate means? If so, write out a definition. Does nonliving mean the same thing as dead? Explain your answer.
• Having Offspring Organisms make other organisms similar to themselves. They do so in one of two ways: by sexual reproduction or by asexual reproduction.
• Growing Up All living things, whether they are made of one cell or many cells, grow during periods of their lives.
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Characteristics of Living ThingsSection 1
Discussion:
What are four living and nonliving things that you interact with every day? How do you know whether each is living or nonliving? Do you know what the word inanimate means? If so, write out a definition. Does nonliving mean the same thing as dead? Explain your answer.
• Thirsty Cells Your cells and the cells of almost all living organisms are approximately 70% water.
Air
• Oxygen Air is a mixture of several different gases, including oxygen and carbon dioxide. Most living things use oxygen in the chemical process that releases energy from food.
• Using Nutrients Some organisms make their own food. Some organisms get food from eating other organisms. But all organisms need to break down that food in order to use the nutrients in it.
• Making Proteins Organisms break down the proteins in food to supply their cells with amino acids. These amino acids are then linked together to form new proteins.
• Proteins in Action Proteins have many different functions. Other proteins are very small and help cells do their jobs. Other proteins, called enzymes, start or speed up chemical reactions in cells.
• What Are Nucleic Acids? Nucleic acids are large molecules made up of molecules called nucleotides.
• Blueprints of Life Nucleic acids are sometimes called the blueprints of life because they have all the information needed for a cell to make proteins.