Plant Review

Plant Review - BIOE 20B Spring 2009 Review Plant diversity...

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BIOE 20B Spring 2009 Review 1 Plant diversity and phylogeny How do different plants relate to each other Major breaks between groups of plants (Fig. 28.7) o Spore vs. seed bearers o Vascular vs. non-vascular Plant morphology Specialized structures of plant cells (Fig. 4.7) Basic plant body plan- shoot and root systems (Fig. 34.2) Differences between monocots and eudicots (Greenhouse lab 1) Cell, Tissue and Organ types 3 types of mature cells. Where in the plant are they found? What are their functions? Are they alive or dead when mature? o Parenchyma o Collenchyma o Sclerenchyma 2 specialized cell types for vascular tissue. What do they transport? Are they alive or dead when mature? What general type of cell are they? o Tracheary elements o Sieve tube elements 3 types of tissue. Where are they found in the plant? What is their function? How are they arranged in the plant? (Fig. 34.6) o Epidermis o Ground o Vascular 3 Organ types o Roots –what regulates movement of water into stele? What’s the pericycle? o Stems –primary and secondary growth; arrangement of phloem and xylem in vascular bundles o Leaves –structure and function of parts Cell division and development Meristems o Apical vs. Lateral o In shoots, auxillary vs. apical buds o In roots, zones of cell division, elongation, and differentiation o Branch and root hair growth: where does the growth start? Tree growth o Primary growth is from apical meristem, secondary growth from lateral meristem. o What does the vascular cambium do? o What is the arrangement of xylem and phloem in relation to the vascular cambium? o Why does girdling kill trees? Water and sugar transport Water potential ( ! )=solute potential ( ! S ) + pressure potential ( ! P ).
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BIOE 20B Spring 2009 Review 2 o What happens to the potential when a flaccid cell ( ! S= -0.7, ! P =0) enters: ! a .4M sucrose solution ( ! S= -0.9) ! distilled water ( ! S= 0) o turgor vs. plasmolysis movement of water into roots o symplastic vs. apoplastic ! is movement through the xylem symplastic or apoplastic? ! Which is more favorable under drought conditions?
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Plant Review - BIOE 20B Spring 2009 Review Plant diversity...

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