unit 5 plant science. importance of plants food clothing oxygen medicines cosmetics reduce erosion
TRANSCRIPT
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Unit 5Unit 5Plant SciencePlant Science
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Importance of PlantsImportance of Plants
FoodClothingOxygen
MedicinesCosmetics
Reduce erosion
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Parts of a PlantParts of a Plant
5 Main PartsLeaves
Roots
Stems
Flowers
Seeds
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LeavesLeaves
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RootsRoots
Fibrousfinely branched roots
Tapone central root
Adventitiousgrow from stems or leaves
Aerialabove ground – no main root system
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StemsStems
• Buds form at nodes
• Internode = space between nodes
• Vascular system = phloem and xylem
• Many times used as silage for livestock
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FlowersFlowers• Female = Pistil– stigma, style, ovary
• Male = Stamen– anther, filament– pollen forms on anther
• Ovules form into seeds• Ovary forms the fruit
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SeedsSeeds
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Plant GrowthPlant Growth
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PhotosynthesisPhotosynthesis
Water + Carbon Dioxide Sugar + Oxygen ChlorophyllSunlight
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Fruits, Nuts and Fruits, Nuts and VegetablesVegetables
Pomology and Olericulture
• Fruits– Pome or Stone– Citrus or Non-citrus
• Vegetables
• Nuts
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More than Just Food and More than Just Food and FiberFiber
• Plant medicines• Cosmetics• Gifts• Recreation• Decoration• Noise buffers• Animal homes
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Genetically Modified Genetically Modified PlantsPlants
• Parent traits are passed along through reproduction (genes)• Hybrids combine traits from different species
• Genetic modification changes the genetic make-up of plants
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