SATII Biology MAY

RoshNY
Sun, 13 May 2007 19:19:46 +0000

I don’t think this was on the test…but since I’m studying for AP tomm…

Yes Stomata are closed off by guard cells in order to prevent water loss
Plants also take in CO2 for use in Photosynthesis through their stomata
Its is like a trade off system really…a plant must sacrifice water to evapotranspiration in order to acquire necessary CO2 molecules

Also C3 plants are normal basic plants
C4 Plants are specially evolved with waxy cuticles and more efficient usage of their stomata
CAM Plants actually seperate the process of collecting CO2 (@ night) and combines it into molecules of carbon containing acids which it will use in daylight to make energy

Hope that helps
Rosh