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"Mitochondria" are the membrane-bound structures that produce energy for cells. The mitochondria are thought to be descended from a once free-living cell that set up a symbiotic relationship with a host cell. More »

www.reference.com Science Biology Cells

Plants need mitochondria because they are essential for the production of adenosine triphosphate, or ATP. In addition, the Krebs Cycle and the electron transport chain, two important steps in cellular respiration, take p... More »

www.reference.com Science Biology Botany

Cristae are folded structures of the inner membrane of mitochondria that create more space to allow for a faster production of energy. They are key to the process that helps release energy during cellular respiration. More »

www.reference.com Science Biology Cells
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Microscopes are important because they allow scientists to study microorganisms, cells, crystalline structures and molecular structures. Microscopes are one of the most important diagnostic tools when doctors examine tis... More »

www.reference.com Science Biology Cells

Eukaryotic cells have organelles, membrane-bound structures that perform different functions in the cell, and prokaryotic cells do not. Some typical eukaryotic organelles include the nucleus, mitochondria, ribosomes, Gol... More »

www.reference.com Science Biology Cells

Damaged human brain cells do not regenerate because the process that creates brain cells, neurogenesis, ceases before birth for many brain structures and in all but one brain structure by age two, according to BrainFacts... More »

www.reference.com Science Biology Cells

Human beings need cells because they are the building blocks for all living structures. While the human body produces a wide variety of cell types, collectively, they are how the human body builds everything from skin to... More »

www.reference.com Science Biology Cells