BIOL 111 Chapter Notes - Chapter 6: Meiosis, Charophyta, Light-Independent Reactions
Document Summary
Lab 6: green algae and seedless plant diversity. Primary producers; convert light energy into chemical energy and release oxygen as by-product: heterotrophs require the organic molecules produced by plants as fuel for cellular activities. Plants exhibit a life cycle with alternation of generations: multicellular diploid organism (sporophyte) alternates with a multicellular haploid organism (gametophyte) Phytoplankton: unicellular organisms containing chloroplast/photosynthetic pigments: photoautotrophic: co2 uptake driven by solar energy produces organic molecules, eukaryotic ancestor of plants. Green algae: linked unicellular protists and multicellular organisms: cellulose cell walls, store food as starch, contain chlorophyll a and b in chloroplasts. These are traits all green algae have and share with land plants. Colony: group of identical cells living attached to one another: ex: volvox. Consists of a hollow ball of biflagellated independent cells. Multicellular organisms have many cells of multiple types, with unique structures and functions. Preventing desiccation: subject to occasional drying out, adaptations: waterproof coverings (ex: cuticle, waxy material covering leaves & stems)
