Saturday, April 29, 2017
Weekly Bio Journal #8 April 29
This week revolved around our transpiration lab. Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. Our task was for each group to test a different variable and observe how it may affect a plants rate of transpiration. My group tested how changes in pressure can alter the transpiration rate. Our actual results were difficult to interpret because the initial set up of the pressure vacuum was difficult to create and may have been done incorrectly. We placed the plant stem and leaves upside down in flasks and stoppered the end with a tube connected to a pipette that would measure the rate of transpiration. What ended up happening because the experimental plant was in a closed environment (in order to create a pressure vacuum), the water levels would drop only to rise again later as all the water cycled through had no where to evaporate to except back into the water well. We shall see how we interpret our findings next week. We also completed a packet on the structure of neurons and took notes on Paul Anderson's Podcast on animal communities, and animal ecosystems.