BIO120H1 Lecture 4: Bio Lecture 4- chap 11 & 12.docx
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BIO120H1 Full Course Notes
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Document Summary
Co2+h20 carbohydrates + o2 photosynthetic structures embody adaptation to environmental studies. Lead size and shape is very important factor. To increase surface area, leaf is perfect for letting oxygen out and absorbing everything. Only problem is that there is a tradeoff when the leaf is being exposed to large amounts of sun. It deals with the large amount of heat coming from the sun by evaporative cooling. Shuts down all gas exchange, including co2 input, so photosynthesis and plant stops growing risks overheating & tissue damage. Trunk has photosynthetic bark. overheating problems are less because lesser sa/v. leaves are also very small. The term for small leaves is called microphyllyl. Plants have a hard time dealing w th stress because they cannot move. The deal with stress by growth and development. Cacti can store water in sponge like tissue =succulents. There is alot of water there for brief periods of time. rillito river. water enters in episodic patterns.
