2-18 Plants-Secondary Growth (answers)

2-18 Plants-Secondary Growth (answers) - SI Leader Anita...

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SI Leader: Anita Vijapura Spring 2010 BSC2011 02/18 Plants: secondary growth Secondary growth is growth in ___ thickness __________ produced by __ lateral meristems _____ and occurs in ___ roots and stems of woody plants, but rarely in leaves ___________. Primary and secondary growth occurs simultaneously but in different regions. Explain! While an apical meristem elongates a stem or root, secondary growth commences where primary growth has stopped, occurring in older regions of all gymnosperm species and many eudicots, but rarely in monocots. Q A SIGN IS HAMMERED INTO A TREE 2M FROM THE TREE’S BASE. IF THE TREE IS 10M TALL AND ELONGATES 1M EACH YEAR, HOW HIGH WILL THE SIGN BE AFTER 10 YEARS? The sign will still be 2m above the ground because only secondary growth occurs in this part of the tree. The secondary plant body consists of the tissues produced by the: 1) vascular cambium a. Develops from: undifferentiated cells and parenchyma cells that regain the capacity to divide b. Function: adds secondary xylem interiorly and secondary phloem exteriorly to increase thickness 2)
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