Which gases will leaves be exchanging Gas Exchange in Leaves What features will gas exchange organs have to maximise the rate of exchange Large surface area short diffusion pathway concentration gradient ID: 1000331
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1. Gas Exchange in LeavesWhat features will gas exchange organs have to maximise the rate of exchange?Which gases will leaves be exchanging?
2. Gas Exchange in LeavesWhat features will gas exchange organs have to maximise the rate of exchange?Large surface area, short diffusion pathway, concentration gradientWhich gases will leaves be exchanging?Oxygen and carbon dioxide
3. Gas Exchange in Leaves
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5. Colour each of the tissues on the sheetLabel the stomataDescribe the function of each structurePages 137-138
6. Observing Stomata
7. Observing StomataCollect two leaves of different kinds.Paint about 1 cm2 of the lower surface of the leaf with clear nail varnish.Allow the nail varnish to dry completely.Carefully place a strip of clear tape over the nail varnish and stick it down carefully.Peel the tape from the leaf, removing the nail varnish with it.Stick the tape to a glass microscope slide.Observe using a microscope at medium powerDraw the distribution, size, and shape of the stoma for the two leaves as seen using the microscope.Which leaf would lose the most water? Why?
8. Exam QuestionDescribe how carbon dioxide in the air outside a leaf reaches mesophyll cells inside the leaf........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(3)5 minutes!
9. 1. (Carbon dioxide enters) via stomata;Reject stroma2. (Stomata opened by) guard cells;3. Diffuses through air spaces;3. Allow concentration gradient. Reject along gradient unless direction made clear4. Down diffusion gradient;