My_Ch35_lecture(2009030500032461)

My_Ch35_lecture(2009030500032461) - Chapter 35: Plant...

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Chapter 35: Plant Structure Purpose —to understand the functions of plant structures What you MUST know in Ch 35: Fibrous vs. Taproot systems 3 types of tissue systems Meristems Monocot vs. Dicot For additional info on plant structure (and source of the photos for this lecture), with good photos and less wordy than Campbell’s: http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookPLANTANAT.html http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookPLANTANATII.html Root systems are adaptations to land Absorb water and minerals, anchor the plant into the ground, conduct water and nutrients to the rest of the plant, and store food Root hairs increase the surface area of roots for absorption (this theme is repeated in animals, for example the villi in your intestines) Root nodules have symbiotic bacteria that convert N 2 to usable nitrogen compounds Taproot system—1 large vertical root, with lateral roots Dicots have taproot systems (plant on the right) Taproots anchor the plant in the ground and can “tap” water deep undergound
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Fibrous root system—mat or cluster of fine threadlike roots; no central taproot Monocots have fibrous root systems Spread-out roots anchor the plant to the topsoil, prevent soil erosion, and cover a wide area for absorbing soil minerals and water. Plant tissues Each part or organ of a plant (leaf, stem, root) is composed of 3 types of tissue: Ground tissue Dermal tissue Vascular tissue Each tissue is continuous throughout the plant. (Fig 35.12, p. 681)
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This note was uploaded on 09/29/2011 for the course BIO 020.152 taught by Professor Pearlman during the Fall '08 term at Johns Hopkins.

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My_Ch35_lecture(2009030500032461) - Chapter 35: Plant...

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