Life Science - download pdf or read online

By Biggs02

ISBN-10: 0078236940

ISBN-13: 9780078236945

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25 (l)Zig Leszczynski/Animals Animals, (r)R. Andrew Odum/Peter Arnold, Inc. 428-S4-MSS05 9/3/04 1:16 PM Page 26 Dichotomous Keys A dichotomous key is a detailed list of identifying characteristics that includes scientific names. Dichotomous keys are arranged in steps with two descriptive statements at each step. If you learn how to use a dichotomous key, you can identify and name a species. Did you know many types of mice exist? You can use Table 2 to find out what type of mouse is pictured to the left.

When organisms die, substances in their bodies are broken down and released into the soil or air. The substances can then be used again by other living organisms. Some of the substances in your body might once have been part of a butterfly or an apple tree. At the beginning of this section, you learned that things such as clouds, sidewalks, and puddles of water are not living things. Now do you understand why? Clouds, sidewalks, and water do not reproduce, use energy, or have other traits of living things.

Living Things How are living things classified? 1. Classification is the grouping of ideas, information, or objects based on their similar characteristics. 1. Organisms are made of cells, use energy, reproduce, respond, grow, and develop. 2. Scientists today use phylogeny to group organisms into six kingdoms. 2. Organisms need energy, water, food, and a place to live. 3. All organisms are given a two-word scientific name using binomial nomenclature. Copy and complete this events-chain concept map that shows the order in which you might use a scientific method.

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Life Science by Biggs02


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