PBIO 1210 Lecture Notes - Lecture 2: Axillary Bud, Chlorophyll, Chitin
10 Jan 2018
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Document Summary
What makes a plant a plant: composed of many cells. Cells are minute in diameter (10-100 micrometers) Hooke"s estimation: 1,259 million cells in a cubic inch of cork. Cells are modi ed according to the functions they perform: cellulose-rich cell walls. Micro brils (microscopic strands) of cellulose can be seen in plant cell walls with a high-magni cation microscope. 80-90% of plants live in close association with fungi. Bene cial fungi help plants obtain essential nutrients from soil. Fungi have cell walls that are rich in chitin (a nitrogen-containing polysaccharide) Photosynthesis production of organic food from inorganic molecules using the energy of light. Most algae (protists adapted for life in water) Parasites get water, minerals and organic food from host plants: adapted for life on land. Embryo a young stage that develops from a fertilized egg within a mother plant"s tissues.
