Plant structure adaptations and responses

Plant structure adaptations and responses - Slide 1...

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Structure of Plants Slide 1
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A. Functions of Roots 1. Anchor & support plant in the ground 2. Absorb water & minerals 3. Hold soil in place Slide 2 Fibrous Roots Root Hairs
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B. Root Types 2. Tap Roots larger central root reaches deep water sources underground 1. Fibrous Roots : branching roots hold soil in place to prevent soil erosion Ex. Grasses Slide 3 Tap Root
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1. Root Hairs: increase surface area for water & mineral absorption 2. Meristem : region where new cells are produced 3. Root Cap: protects tip of growing root C. The Structure of a Root Slide 4 Root Hairs Meristem Root Cap Xylem Phloem
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A. Functions of Stems 1.Support system for plant body 2.Transport system carries 3.Holds leaves & branches upright Slide 5 Each light and dark tree ring equals one year of annual growth. Light rings for fast spring growth, dark for slow summer growth. Smaller rings tell of past droughts that have occurred . Looking at the picture to the left: What years had the most rain? What years experienced the worst drought?
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A. Functions of Leaves Slide # 6 1. Main photosynthetic organ 2. Broad, flat surface increases surface area for light absorption 3. Have systems to prevent water loss Stomata open in day but close at night or when hot to conserve water waxy cuticle on surface 1. System of gas exchange Allow CO 2 in and O 2 out of leaf Elephant Ear Plant
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B. Leaf Structures 1.Cuticle : waxy layer; covers upper surface Protects leaf against water loss 1.Veins: transports water, nutrients and food Made of xylem and
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This note was uploaded on 11/07/2011 for the course BIOLOGY 100 taught by Professor Staff during the Winter '08 term at BYU.

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Plant structure adaptations and responses - Slide 1...

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