Study Guide Exam 3-1

Study Guide Exam 3-1 - Study Guide Exam III Lecture 13...

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Study Guide Exam III Lecture 13 (Chapter 35)- plant structure How are plant cells like all other cells? Nucleus (nuclear envelope, nucleolus, chromatin); ER's; Centrosomes, golgi, mitochondria; peroxisome; membranes, ribosomes, cytoskeletons How are plant cells different from all other cells? Have: chloroplasts, central vacuoles and tonoplast, and plasmodesmata. Don't have: lysosomes, centrioles or flagella. What are the three basic parts of higher plants? Roots, stems leaves What are characteristics of angiosperms? Dicots? Monocots? What are various things that roots do? Anchors vascular plants, absorb minerals and water and store organic nutrients. Eudicots and gymnosperm have taproot system. Modified roots: prop, storage, strangling aerial, buttress, pneumatophores. What are the various parts of the shoot? Nodes – points of leaf attachments; internodes: stem segments between nodes; axillary buds: can form lateral shoots; terminal bud: developing leaves and compact series of nodes and internodes. What are some modifications of shoots? Stolongs (runners, asexual reproduciton); bulbs ( underground shoots made of bases of leaves used for storage); tubers (enlarged ends of rhizomes for storage; eyes are axillary buds making nodes); rhizomes (horizontal stem below surface; is noded) What are the parts of a leaf? Tendrils, splines, storage leaves, bracts (bright, surround flowers), reproductive leaves What are some modified leaf functions? Support, protection, storage, attractions, reproduction What are the three plant tissues? Dermal, ground, vascular What is vascular tissue? Carry out ling distance transport of materials between shoots and leaves What is phloem? Transport organic nutrients such as sugars to growth sites What are phloem cells? Seive tube members: living cells w/o nucleus, ribosomes or vacuole with perforated end walls allowing for transport of nutrients across cell. Companion cell connected by pasmodesmata has missing organells to support seive tube members and help load sugars. What does phloem do? Organic nuctrient transport. 1
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What is xylem? Tubolar elongated cells dead at maturity that transport water from roots to leaves What are xylem cells? Tracheids: tapered ends, water moves through pits without secondary walls. Secondary walls have lignin for support. Vessels: shorter, thinnerwalls and not as tapered. Arranged end to end forming pipes. What does xylem do? Water transport. What is a protoplast? Cell without cell wall. What does the plant cell wall do? Protects and supports. What are plasmodesmata? Perforations in cell wall allowing nutrient exchange. Where do shoots and roots grow? Shoots – aprical meristems and lateral meristems (vascular and cork cambiums) What are buds? What are meristems?
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This note was uploaded on 03/27/2008 for the course BIOL 212 taught by Professor Shen during the Spring '08 term at Iowa State.

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Study Guide Exam 3-1 - Study Guide Exam III Lecture 13...

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