BILD 2 - BILD 2 MIDTERM REVIEW Lecture 1(Ch 39.2 A...

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BILD 2 MIDTERM REVIEW Lecture 1 (Ch. 39.2) coleoptiles , enclosing the shoot of a grass seedling, bends toward the light when illuminated from one  side because of elongation of cells on darker side Gibberellins stimulate growth Abscisic Acid (ABA) slows growth. Ethylene  is produced by plants in response to stress and during fruit ripening and programmed cell death Ethylene initiates  triple response , which is slowing of stem elongation, thickening of stem and initiation  of horizontal growth Senescence  is the programmed death of plant organs or whole plant Apoptosis , or programmed cell death, requires synthesis of new enzymes that break down many cellular  components, which plant may salvage Ethylene promotes fruit ripening; initiates triple response; involved in apoptosis. Cytokinins stimulate cell division, growth, and germination; anti-aging. Abscisic Acid (ABA) inhibits growth; maintains dormancy; closes stomata during water stress. Auxin stimulates stem elongation, root branching, fruit development; apical dominance Brassinosteroids promote cell elongation and division, xylem differentiation; retard leaf abscission Gibberellins promote stem elongation, seed germination; contributes to fruit set. Gibberellins  are necessary for a seed to break dormancy Cytokinins , synthesized in the root, counteract apical dominance Polar transport of Auxin involves movement of Auxin through transport proteins located only at the basal   ends of cells Which of the following situations would most likely stimulate the development of axillary buds? o A small amount of auxin travelling down from the shoot and a large amount of cytokinin travelling       up from the roots The growth inhibitor in seeds is usually Abscisic Acid Which of the following hormones would be sprayed on barley seeds to speed germination in production of  malt for making beer?
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o Gibberellin Lecture 2 (Ch. 40.1-40.2, 45) Interstitial fluid  – exchange surfaces in the circulatory system Epithelial tissue  lines the outer and inner surfaces of the body in sheets of tightly packed cells Lumen – outside of an organ Connective tissue  binds and supports other tissues and relatively few cells suspended in an extracellular  matrix of fibers embedded in a liquid, jellylike or solid formation 1. Collagenous fibers: made of collagen and have nonelastic strength 2. Elastic fibers: made of protein elastin, can stretch and provide resilience 3. Reticular fibers are composed of collagen and form a tightly woven connection with adjacent tissues.
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