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____ are used to input data about a person into a computer system so that the individual can be identified based on a particular unique physiological characteristic.
Nitrogen Fixation
The conversion of atmospheric nitrogen (N2) to ammonia (NH3) by certain bacteria; part of the nitrogen cycle.
Ecological Pyramids
Graphical representations showing the relative amounts of energy or matter contained within each trophic level in a given ecosystem.
Pyramid of Numbers
A graphical representation showing the number of organisms at different trophic levels in an ecosystem, typically decreasing from producers to top predators.
Photosynthesis
The process by which green plants and certain other organisms transform light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen.
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