Chapter 34 and 35 - Stems and Transport Understand the...

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Stems and Transport Understand the basic structure and function of the stem. Be able to describe and draw the external and internal structures of a stem, identifying the major structural features of that stem. Understand how the monocot and dicot stems differ in their internal structure. Understand how the structure of a woody stem changes with secondary growth.
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Stems and Transport Be able to describe the mechanisms (tension- cohesion model and root pressure model) that allow fluid movement in the xylem. Understand how environmental conditions (soil moisture, relative humidity, temperature, etc.) would impact fluid movement within the xylem. Be able to describe the mechanism (pressure- flow hypothesis) that allow for movement of sugar within the plant.
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Stems Aerial support Transport Storage Photosynthesis
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External (Woody) Stem Structure Bud = embryonic shoot Terminal bud Bud scales: modified leaves Axillary (lateral) buds Node Internode
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External (Woody) Stem Structure Bud scale scar Leaf scar Bundle scar Lenticels
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External (Woody) Stem Structure Primary Growth Elongation Apical meristem Secondary Growth Lateral meristems Increase girth
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Dicot Stem Structure Epidermis and Cuticle Pith: Storage (parenchyma) Pith rays: Cortex Ground tissue Photosynthesis Support Storage
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Dicot Stem Structure Vascular bundles Arranged in a ring around the pith Xylem Phloem Phloem fiber cap
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Monocot Stem Structure Epidermis Ground tissue Vascular bundles Scattered throughout stem
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This note was uploaded on 12/07/2009 for the course BIO 101 taught by Professor Don during the Fall '09 term at Ivy Tech Community College.

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Chapter 34 and 35 - Stems and Transport Understand the...

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