Plants have two separate transport systems. A network of xylem vessels transports water and mineral ions from the roots to all other parts of the plant. Phloem tubes transport food made in the leaves to all other parts of the plant. Neither of these systems has a pump‚ this is because they are not as active as animals and do not need such rapid supplies of food. Neither xylem nor phloem transports oxygen as oxygen gets to a plants cell by diffusion. Both stems and roots contain xylem vessels and
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Diffusion And Osmosis Abstract In this Diffusion and Osmosis lab a total of three experiments were performed. For experiment 5.1 we investigate diffusion through a selectively permeable membrane and the many factors that influence the rates of diffusion. In experiment 5.2 we investigate both animal and plant cells in different molar solutions and the different osmotic behaviors within the cells. In experiment 5.3 we test the osmolarity of plant cells through the usage of potato tuber cells
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Glomerular Filtration Activity 1: Effect of Arteriole Diameter on Glomerular Filtration 1. Compare this data with your baseline data. How did increasing the afferent arteriole radius affect glomerular filtration rate? >>Increasing the afferent arteriole radius pushed the glomerular pressure‚ the glomerular filtration rate‚ and the volume of urine to be higher than the baseline data. Increasing the afferent arteriole radius increased the glomerular filtration rate. 2. Under
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higher temperatures. 3. State how sucrase activity changes with increasing sucrose concentration. Discussion 1. Explain how pH and temperature affect enzyme activity. 2. Compare optimal temperature for sucrase activity to body temperature. 3. Specifically state where in the intestine sucrase is likely to be most active (pH along GI tract). 4. Explain how sucrase activity in the intestine is affected by the sucrose content of food. Why is this important? 5 Heat treatment was used to denature
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(a) (i) ● the concentrated sucrose solution in X has a lower water potential than the water in flask A (1)-water from flask A moved into X by osmosis (1) ● generated a hydrostatic pressure that forced the contents in X (with the dye) to move into Y (1) via the tubing L (ii) ● tubing M channelled water from flask B to flask A (1) ● this resulted in a continual supply of water for mass flow (1) ● M = *Xylem (1) (iii) X‚ sucrose formed by the photosynthetic
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AP Biology Unit Test Review Guide Plants Obtaining and Transporting Nutrients Pigments and photosynthesis 1. Distinguish between the strategies used by autotrophs and heterotrophs to obtain free energy for cellular processes. In other words‚ how and in what form does each capture and store that energy? 2. Explain how photosynthesis differs in eukaryotic organisms (with organelles such as chloroplasts) and in prokaryotic organisms (single-celled‚ no organelles). 3. How does a metabolic
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Firstly‚ there was a source of error when testing sucrose for a carbohydrate presence using Benedict’s Regent. According to Dr. Hunt‚ the sucrose solution should have remained blue but instead the sucrose turned teal in colour. This could be a result of mixing different solutions by accident. Fortunately‚ this was a very minor issue which was unfortunately over looked. The next
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Biology 100 Lab Laboratory Report Title: Identifying the four major classes of macromolecules through various tests. Group Members: Antonia Johnson‚ Payton Ewing‚ Lenneisha Hepburn‚ Kendisha Hanna‚ Introduction: Macromolecules also known as biological molecules are monomers which are the simple units of polymers. All macromolecules contain carbon and hydrogen which are found in organic compounds. In this Experiment we will test for the presence of protein‚ starch‚ lipids‚ and sugars by analyzing
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Gel Filtration Gel filtration is a non-adsorptive chromatography technique that separates molecules on the basis of molecular size. Desalting and buffer exchange are two special examples of gel filtration that are widely used in many downstream bioprocesses. Desalting is used to completely remove or lower the concentration of salt or other low molecular weight components in the sample while buffer exchange replaces the sample buffer with a new buffer. Gel filtration is one of the easiest chromatography
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Introduction A series of biochemical tests was carried out to identify unknown carbohydrates. There were six carbohydrates that needed to be identified; they have been randomly labelled A-F. The carbohydrates are glucose‚ fructose‚ maltose‚ lactose‚ sucrose and starch. There was six tests that were carried out to help identify them‚ these were: Iodine Test‚ Solubility in Water‚ Benedict’s test‚ Acid Hydrolysis‚ Barfoed test and Diastix test. Aim The aim of the experiment which was carried out was
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