BIO 152 Lecture Notes - Lecture 6: Chloroplast Dna, Intermembrane Space, Brown Algae

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Have own dna: circular like prokaryotic dna. Have double membrane: inner and outer. Involved in energy processing: respiration and photosynthesis, respiration: breaks down sugar and releases molecules and water need in cell. Ancestral eukaryote ingested bacteria and it did not get digested. Mitochondria performed in breaking down glucose and getting atp. Ancestral eukaryote benefited from it (mitochondrion), and the bacterial was passed down. Mitochondria dna: most similar to proteobacteria. Chloroplast dna: most similar to cyanobacteria (photosynthetic bacteria) Precambrian: most of earth"s timeline, photosynthesis, prokaryote, then eukaryote. Single cellular multicellular life: proterozoic era, cambrian: diversification of phyla. Ex) some seaweed: green algae/land plants, brown algae. Single celled organisms: all prokaryotes, many eukaryotes. Simple multicellularity: multiple cells, but not different, each cell can function alone. Complex multicellularity: cellular differentiation cells different from each other. Ex) skin cells and brain cells: cells working together. What problems do multicelled organisms have to face: communication, delegating tasks, getting rid of waste, inside cells getting food.

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