95% of a plant’s water loss is through these small pores.
An internal clock in the guard cells open the stoma at dawn even if the plant is in the dark.
Hypothesis stomata density in leaves directly exposed to the sun will be greater then those in the shade In this environment the southern faced leaves are directly exposed to sunlight, where the northern faced leaves are low to the ground with less sunlight exposure.
Conclusion Looking at the t Critical and t Stat , we confirm that there is a significant difference between stomata density in leaves of the shade and sun areas Looking at the Probability we can assure that we are 100% sure of our conclusion Statistics Sun Shade Mean 251.92 186.50 Variance 1202.34 452.27 Standard Deviation 34.67 21.27 t Stat 5.57108 t Critical one-tail 1.73406 P(T<=t) one-tail 1.372 x 10 -5
Bruce W. Grant, Itzick Vatnick, and the Ecological Society of America. 2004.Environmental Correlates of Stomata Density. TIEE. http:// tiee.ecoed.net/vol/v1/experiments/stomata/stomata_description.html . “ February16, 2011 ”