Organisms are classified based on physical traits and genetic similarities like DNA. Observing an organism's genotype and phenotype helps in understanding its characteristics.
Observations of organisms include descriptions of the number, size, and arrangement of parts of the organism. Traits are essential in grouping organisms, such as similarities in physical traits or molecules like DNA among related organisms. Understanding an organism's genotype (DNA) and phenotype (physical characteristics) is crucial in studying organisms.
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