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What You Absolutely Need to Know To Pass the NYS Living
What You Absolutely Need to Know To Pass the NYS Living

... chemical respiration (which uses energy from sugar to make ATP). Excretes the waste, carbon dioxide, which is produced from chemical respiration. The diaphragm is the muscle that allows breathing to occur. You breathe faster when CO2 builds up in the blood (not when you need oxygen). The alveoli are ...
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What You Absolutely Need to Know To Pass the
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Biology Keystone Exam Review Packet

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Biology Keystone Practice PowerPoint
Biology Keystone Practice PowerPoint

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Taxonomy and Virus Review Answer Key File

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Biology SOL Review Packet
Biology SOL Review Packet

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Symbiogenesis



Symbiogenesis, or endosymbiotic theory, is an evolutionary theory that explains the origin of eukaryotic cells from prokaryotes. It states that several key organelles of eukaryotes originated as a symbiosis between separate single-celled organisms. According to this theory, mitochondria, plastids (for example chloroplasts), and possibly other organelles representing formerly free-living bacteria were taken inside another cell as an endosymbiont around 1.5 billion years ago. Molecular and biochemical evidence suggest that mitochondria developed from proteobacteria (in particular, Rickettsiales, the SAR11 clade, or close relatives) and chloroplasts from cyanobacteria (in particular, nitrogen-fixing filamentous cyanobacteria).
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