IB HL BIOLOGY Dialysis Lab: Exploring Osmosis and Diffusion Through A Membrane Introduction: Dialysis is the flow of certain solutes through a semi permeable membrane. Dialysis is usually used on patients with failing kidneys to clinically purify blood in their kidneys‚ or other regions of their bodies. The dialysate contains waste matter that flows from the blood our of the dialysis tubing. Question/aim of lab: To test the solutions inside and outside the dialysis tubing with Benedict’s
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necessary energy (Slaughter et al.‚ 2001). The enzymatic activity of α-amylase is facilitated by calcium and chloride ions during the hydrolysis (Marini‚ 2006 and Siddiqui et al.‚ 2010). The complete digestion of starch and formation of maltose and glucose can be examined through the iodine test when I2KI reagent is added into the solution and remains brown instead of turning into dark blue‚ marking that all the molecules of starch have been fully hydrolyzed (Hanes‚ 1932). While amylase effectively activates
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released though pores called stomata. The overall reaction can be expressed as follows; 6H₂O + 6CO₂ C₆H₁₂O₆ + 6O₂1 There are four variables that affect the rate of photosynthesis; light intensity‚ temperature‚ CO₂ and water.2 However‚ is it possible to count in the colour of light‚ too‚ which I am going to investigate in this lab. Since the photosynthesis takes place in chloroplasts that has chlorophyll‚ the rate of photosynthesis can be affected by different colours of light‚ since the absorption
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Why can’t penguins fly? Why can’t penguins fly? This is a question that has been asked ever since the discovery of the majestic bird that has the inability to fly. Well the only thing to blame would be the penguins themselves since they adapted to stop flying and start swimming. Another frequently asked question is “why can’t penguins swim and fly”? All of these questions will be answered in this essay. Why did penguins adapt to to swimming instead of flying? One answer to this is that penguins
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Dayanna Chiriboga 02/03/2015 Lab Report #1 Genetics 1 χ² Results : Phenotype Expected Expected Observed Ratio Counts Counts (Eͥ i) ͥ (Oi) Deviation (di) =(EiOi) di² = (EiOi)² di²/Ei Purple 75% 657 642 15 225 .34 Yellow 25% 219 234 15 225 1.03 Χ² = ∑ (di / Ei) = 1.37 According to the chi square chart values we are 80% confident that our hypothesis is correct
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I am the one and only Me 1. What is unique about me? _ I have a red (violet if I feel cold) birth mark on my right arm‚ which takes the shape of Pac-man (A video game character popular in 1980s) _ I have an imagination of a child yet do things in realistic ways _My DNA‚ mypersonality‚ my experience‚ my look and my way of thinking and doing things 2. What makes me special? _ I have IQ level over 130‚ this doesn’t make me a genius but still enough to separate me from 90% population of the
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progeny will reflect the founder’s gene pool. This is known as the founder effect. Materials Beaker #1 Beaker #2 Beaker #3 Questions 1. What observations can you make regarding the gene pool and gene frequency of the founding individuals? 2. Do these results vary between the populations founded by beakers #1‚ #2 and #3? Why or why not? 3. What observations can you make about the genetic variation between the parent and founding populations? 4. Suppose you have a population of 300 butterflies
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Introduction: The purpose of this lab is to test the effect certain stimuli has on the behavior of a terrestrial isopod. These bugs are more commonly known as pill bugs and potato bugs. The objective of this experiment is to determine which kinds of habitats potato bugs favor. Potato bugs have an innate behavior called taxis which will cause the animal to move away from a stimulus that is unwanted and towards a stimulus that is favored. Different stimuli which can cause taxis to occur are light‚ sound
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Charbel Bassil Notre Dame University Principles of Macroeconomics ECN212 Required Homework Assignment 5 Prepare problems 3‚ 5 and 7 on pp.521 and the additional problem‚ Principles of Economics‚ Case‚ Fair and Oster. Problem 3 p.521 For each of the following statements‚ decide wether you agree or disagree and explain your answer : 1. During period of budget surplus (when
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Lord of the Flies Worksheet: Chapter 1 Answer the questions. For each answer‚ indicate the page number in parentheses.10 pts. 1. How did the boys arrive on the island? 2. How did Ralph call the first meeting? 3. What are the names of the twins? 4. What does Ralph’s dad do? 5. What nationality are the boys? 6. The island was roughly _______ - shaped. 7. What is the "scar?" 8. For whom did Piggy vote as chief? 9. Who went to make sure the island was really an island
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