bio sf 6 - PlantStructuresand Transpiration

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Plant Structures and  Transpiration
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Classification of Plants Arose from green algae and share many of  their  characteristics Photosynthetic organisms that develop from  embryos protected by parental tissue Use Chlorophylls a and b in photosynthesis Use starch as a photosynthetic storage  product Have cellulose in their cell walls 10 groups of land plants; 7 of which are  vascular and 3 nonvascular What do you think the difference may be here?
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Vascular vs. Nonvascular plants Vascular land plants are also called  tracheophytes  because they possess fluid- conducting cells called  tracheids . These represent the aforementioned 7 groups  of vascular plants Nonvascular land plants lack tracheids i.e. liverworts, hornworts, and mosses
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For the purposes of today’s  lab, we will be focusing on  vascular plants
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Characteristics of Vascular  Plants The first land plants were non-vascular,  lacking both water- and food-conducting  tissue Tens of millions of years later, the first  vascular plants arose which possessed  fluid-conducting tracheid cells The vascular system consists of tissues  that transport materials from one part of  the plant to another. Xylem and phloem
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“We’re not in water anymore, Toto” Need to obtain water and  minerals from environment Roots absorb water and  dissolved nutrients by  osmosis Absorbed water can only go a  short distance through  osmosis and capillary action,  so how does the water  continue up the stem?
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