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A rock sample containing an isotope with a half-life of 28 million years has an initial mass of 184 grams. How much time has elapsed after three half-lives?
Genetically Identical
Having the same genetic material or DNA sequence. In biology, this usually refers to organisms or cells produced through processes such as cloning.
Plant Cells
Cells that make up plant tissues, distinguished by their rigid cell walls, chloroplasts for photosynthesis, and large central vacuole.
Lignin
An organic substance binding the cells, fibers, and vessels of wood and plants, contributing to the stiffness and strength of the cell wall.
Polymer
Large molecules composed of many repeated subunits, known for their broad range of properties and uses in natural and synthetic materials.
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