BIOL 1202 Chapter : Chapter 35 Learning Objectives

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15 Mar 2019
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Concept 35. 1: the plant body has a hierarchy of organs, tissues, and cells: describe and compare the three basic organs of vascular plants, leaves shoot system. Pull up water through transpiration (evaporation) out of stomata: stems shoot system. Transport absorbed substances from roots to leaves through xylem. Transport sugars from leaves to root through phloem. Nodes, internodes, axillary buds, terminal buds: roots below ground. Absorb water, oxygen, and minerals from ground. Root hairs increase surface area: describe the basic structure of plant stems, nodes point at which leaves attached. Supports young growing stems: sclerenchyma thick, rigid 2 layers of cellulose; dead at maturity; Major support: water-conducting cells in xylem . Vessel elements short, wide, tubular cells, bigger: sugar-conducting cells in phloem . Companion cells conducting cells; alive; support sieve tube: explain the functional relationship between a sieve-tube member and its companion cell, companion cells support sieve tube members members.

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