BIOL 152 9thEdition Lecture 12Outline of Last Lecture I. Why Become MulticellularPart 2II. MulticellularityIII. Plants vs. AnimalsIV. General Requirements Outline of Current Lecture I. Progressing Towards PlantsII. Green Algal Ancestors III. Necessary Adaptations for Life on Land Current LectureI. Progressing Towards Plants- Red algae:o Multicellularo Photosynthetic Phycoerythrin, accessory pigment Blue-green light o No flagellated stages “passive” fertilization- “every living organism is both a whole unto itself and a part of something largero The trend towards multicellularity Plasmodial Pseudoplasmodia Colonial and brown algae Simple multicellular Differentiated multicellular- So why move out of the water?o Limited mineral resourceso Life more abundant near shore Rich in nitrates and mineralso Lighto CO2II. Green Algal AncestorsThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Multicellular, eukaryotic, photosynthetic autotrophs- Chloroplasts with chlorophylls a & b- Cellulose in cell wallso % and synthesis- Enzymes in peroxisomes- Structure of flagellated sperm- Details in cell divisionIII. Necessary Adaptations for Life on Land- Drying out- Gas exchange- Support- Conduction-
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