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classification grade 9 chapter 3
The document defines several key characteristics of living things including growth, movement, sensitivity, excretion, reproduction, nutrition, and respiration. It then discusses how organisms are classified, beginning with how they are originally classified based on morphology and anatomy, and now using DNA sequencing which shows how closely related organisms are based on similarities in their DNA sequences. It provides examples of classifying animals into different phyla and classes based on their distinguishing characteristics.
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