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All the parts of the planet that are inhabited by living things; sum of all Earth's ecosystems.
The systematic arrangement of similar entities on the basis of certain differing characteristics and the basis of their relationships.
Community of living things plus the nonliving features of the environment that support them.
Generation-to-generation change in the proportion of different inherited genes in a population that account for all of the changes that have transformed life over an immense time.
Organisms belonging to the same family evolved from the same ancestors and share relatively common characteristics.
A taxonomic category ranking used in biological classification that is below a family and above a species level, and includes group(s) of species that are structurally similar or phylogenetically related.
A taxonomic rank used in classifying organisms, generally below the class, and comprised of families sharing a set of similar nature or character.
Process by which plants use the sun's energy to convert water and carbon dioxide into sugars.
Organism that makes its own food (autotroph) and produces organic molecules that serve as food for other organisms in its ecosystem.
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