Biology - The scientific study of life. , Cells - The basic unit of life., Mitochondria - The powerhouse of the cell., Tissues - Group of cells with a common structure and function. , Organ - Group of tissues that work together to perform closely related functions., Organ System - Group of organs that work together., Nucleus - A part of the cell containing DNA and RNA and responsible for growth and reproduction, Vacuole - A cell organelle that stores materials such as water, salts, proteins, and carbohydrates, Cytoplasm - A jellylike fluid inside the cell in which the organelles are suspended, Cell wall - A rigid structure that surrounds the cell membrane and provides support to the cell,

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