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Waveform Audio File Format  |  1995-06-29  |  396.1 KB  |  1 channel  |  22,050 sample rate  |  36 seconds  |  [TEXT/LMAN]
Transcription: Most plants are green because they contain the substance chlorophyll. They use it to trap light energy. This is used during photosynthesis to make food. Plants are usually anchored in a growing medium such as soil. Some, such as mosses and liverworts, are small and delicate. Others, such as the giant redwood trees, are huge. Many plants, such as marigolds and sunflowers, are annuals, which means that they live for just a year. Perennials can live for many years. Some bristlecone pine trees, for example, are 5,000 years old.