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Characteristics of living things Aseel Samaro What is this building made of ? What are we made of ? Cells: The Building Blocks of Life! What makes the dog alive ? Characteristics of living things 1. 2. 3. 4. 5. 6. Living things have Cells Living things Sense and respond to change Living things reproduce Living things have DNA Living things use energy Living things grow and develop Living things have Cells Every living things composed of - one or - more cells. Thus, cells are the basic unit of living things. A cell is a membrane-covered structure that contains all the materials necessary for life. Cells contain Nutrients DNA information many other things to help our body function in everyday activities. Living things have Cells Trillions of cells make up these organisms Each of these organisms is made of only one cell Living things have Cells Cells perform specialized functions For example: 1. Nerve cells transport signals 2. Muscle cells help in movement Living Things Sense and Respond to Change All organisms have the ability to sense change in their environment and to respond to that change. Please, expose some light on your friend’s eye Stimulus (plural, stimuli) is a change that affects the activity of the organism Stimuli can be: Light Sound Hunger Living Things Sense and Respond to Change A gentle touch causes a response in the plant Living Things Sense and Respond to Change Give more examples of stimuli Living Things Reproduce Living Things Have DNA The cells of all living things molecule deoxyribonucleic acid (DNA) contain the DNA controls the structure and function of cells. Thus, DNA is a special molecule that is found in the cells of all living things. It provides instruction for making molecules called protein Protein take part in almost all of the activities of an organism’s cell Living Things Use Energy Organisms use energy to carry out the activities of life. Name four activities in living things that require energy. Living Things Grow and Develop All living things, whether they are made of one cell or many cells, grow during periods of their lives. In a single-celled organism the cell gets larger and divides, making other organisms. In organisms made of many cells the number of cells gets larger, and the organism gets bigger. In addition to getting larger, living things may develop and change as they grow. Living Things Grow and Develop Over time, acorns develop into oak seedlings, which become oak trees. Living Things Grow and Develop What are four living and four nonliving things that you interact with or see everyday?