BI111 Lecture Notes - Lecture 6: Hemicellulose, Root System, Lignin
Document Summary
Photosynthetic (chlorophylls a and b carotenoids in thylakoid membranes. Plant bodies are dendritic (spreading and branched in form) Highly adaptive for photosynthesis and positions flowers for pollination. Bud gives rise to extension of shoot or new, branching shoot. Produces flowers which later develop fruits containing seeds. Organ/tissue system: body structure that contains two (or more) types of. Organ/tissue system: body structure that contains two (or more) types of tissues and have a definite form and function. Tissue: group of one (or more) types of cells and intercellular substances that function together in one or more specialized tasks. Primary cell wall (surrounding plasma membrane and cell contents) Large vacuole (30-80% of internal volume) tonoplast membrane. Used for storage and to maintain turgor pressure against the cell wall. Cellulose is a branched polymer made of 7,000-15,000 glucose molecules per polymer (most abundant organic substance on earth!) Hemicellulose is a branching polymer consisting of chains of 500-3,000 sugar units.
