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The Tertiary Period and Quaternary Period are divisions of geologic time. The Tertiary Period occurred first, from 65.5 to 2.6 million years ago, and covers the time period from the extinction of the dinosaurs to the beginning of the Ice Ages. The Quaternary Period occurred from 2,588,000 years ago until today, beginning when glaciation started.
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∙ 9y ago
Wiki User
∙ 14y agoIn proteins, tertiary structure is the way the string of amino acids is all folded together. Quaternary structure involves two or more strings of amino acids coming together. For example, hemoglobin is made up of four different proteins. Each one has a tertiary structure, but together, they form hemoglobin's quaternary structure.
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