: Introduction to Plant Biology (Sophomore-l able Unit: General Plant-Water Relations tudents already understand: perties of water, adhesion, cohesion, osmosi nt anatomy ic cell structure tudents have prepared for lecture by reading ned textbook chapter about plant-water relat
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Class: Introduction to Plant Biology (Sophomore-level) Teachable Unit: General Plant-Water Relations Our students already understand: - properties of water,
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Class: Introduction to Plant Biology (Sophomore-level)
Teachable Unit: General Plant-Water Relations
Our students already understand:- properties of water, adhesion, cohesion, osmosis- plant anatomy- basic cell structure
Our students have prepared for lecture by reading theassigned textbook chapter about plant-water relations.
Learning goal:Understand how water moves through plants
Learning outcomes:1. Describe the pathway of water from soil to plant
to atmosphere2. Explain the processes that move water through plants3. Analyze the effects of changing abiotic factors on
You observe water droplets on the margin of geranium leaves at 6 am but not at noon.Using your knowledge of plant-water relations &the information below, explain this phenomenon.
Match plants A to Dwith biomes 1 to 4
A.
B.
C.
D.
1.
2.
3.
4.
Have students fill out the diagram collectivelyon single large diagram (doc-cam, big poster, etc)
Teaching Strategy #1: Go through the responses with them. Does anyone disagree with certain responses? For each process from roots to shoots, segue to mini-lecture teaching slides. Let studentsreevaluate their drawings.
Teaching Strategy #2: do mini-lecture and let students reevaluate their drawings.
Mini-lecture on each of the processes-their properties-their limits in terms of movement
Osmosis: gets water from soil into rootsDiffusion: mainly occurs in leaf to atmosphere because
the atmosphere has very little water vapor.Active transport: doesn’t occurCapillary action: gets you less than 1 meter above soil
surface.Cohesion-tension: is the major mover.
Group work: revise your labels and share upfront.Which processes are the most important at each point?