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Biology is the study of living things. The goal of biology is to see how living things are related in some way and to do that, connections are made between living things that exist today and their extinct ancestors. Evolution, which basically means change is an important concept in biology. Using evidences such as homologous structures, DNA, blood, cytology, fossil record and others, scientists attempt to construct a cohesive picture of how living things have changed over time to show phylogenetic relationships. Other important concepts in biology are to understand the structure, function and growth of organisms and taxonomy which is the naming and grouping of organisms according to shared structures.
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