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a complex chemical compound that fills the spaces in the cell wall between cellulose, hemicellulose, and pectin components, especially in tracheid, sclereid and other xylem cells. This makes the cell walls hard, woody and waterproof.
liquid that drains out of a landfill and is contaminated with solutes from the waste matter
the collection and disposal or recycling of waste materials and the monitoring of waste.
biochemical process that traps radiant or light energy from the Sun and converts it into glucose...
a chemical substance found in food that is essential for maintaining life.
three pairs of exocrine glands which secrete saliva into the mouth.