Biology Photosynthesis Lab - 934 Words

Biology lab AIM: To test a leaf for starch APPARATUS/MATERIALS : * bunsen burner, tripod stand, wire gauze(OR 90oC electric water bath OR hot plate) * 250 cm3 beaker * boiling tube * anti- bumping granules * forceps * test tube holder * white tile * leaf to be tested (hibiscus leaves are excellent) * 90% ethanol * iodine/potassium iodide solution PROCEDURE: The video above shows the steps in Testing a Leaf for the Presence of Starch. The Procedure outlined below is slightly different. 1. Remove a green leaf fom a plant that has been exposed to sunlight for a few hours 2. Half-fill a 250cm3 beaker with water. Heat the water until it boils. Keep the water at boiling point. 3. Use the†¦show more content†¦Most photosynthesis takes places in the green parts of plants, in particular the leaves. Photosynthesis involves 2 stages - the Light-dependent Stage and the Light-independent stage. In the light-depedent stage, water is photolyzed by sunlight into Hydrogen and oxgen. Hydrogen enters the second stage, oxgen is gaseous by-product. In the light - independent stage enzymes catalyse the reduction of carbon dioxide by hydrogen. The carbohydrate, glucose is first formed. Glucoe may be immediately used, translocated in the form of fructose or sucrose or stored as starch granules. The overall equation for photosynthesis is: 2. Which organic substance does iodine/potassium iodide solution detect the presence of? What observations will you make if the test is positive? Starch. The iodine solution will turn from brown to blue - black. 3. Explain the significance of boiling the leaf in water. Boiling the leaf in water: * Removes the waxy cuticle which prevents entry of iodine/potassium iodide solution. * Ruptures cell membranes to make starch granules in cytoplasm and chloroplasts accessible to iodine/potassium iodide solutiion. Cell membranes are selectively permeable and do not readily allow the penetration of iodine. * Denatures enzymes, particularly those which convert starch to glucose e.g. diastase. Boiling arrests all chemical reactions, since enzymes which catalyse the reactions areShow MoreRelatedBiology Photosynthesis Lab925 Words   |  4 PagesBiology lab AIM: To test a leaf for starch APPARATUS/MATERIALS  : * bunsen burner, tripod stand, wire gauze(OR 90oC electric water bath OR hot plate) * 250 cm3 beaker * boiling tube * anti- bumping granules * forceps * test tube holder * white tile * leaf to be tested (hibiscus leaves are excellent) * 90% ethanol * iodine/potassium iodide solution PROCEDURE: The video above shows the steps in Testing a Leaf for the Presence of Starch. The Procedure outlined below isRead MoreThe Analysis of Spinach Pigmentation During Photosynthesis (biology Lab Report)1050 Words   |  5 PagesSpinach Pigmentationp During Photosynthesis p University of Alabamap I. Introduction:p quot;Photosynthesis is the conversion of light energy to chemical energy that is stored in glucose or other organic compounds; it occurs in plants, algae, and certain prokaryotesquot; (Campbell, G-16). The formula below is photosynthesis and quot;the ingredients necessary to make a plant growquot; (KoK, 30).p 6CO_2 + 6H_2_0,,#179; C_6_H_12_O_6_ + 6CO_2p Photosynthesis occurs within chloroplasts whichRead MoreThe Effect of Temperature on Photosynthesis1085 Words   |  5 Pagesproduct of photosynthesis, which is the process that converts energy in sunlight to chemical forms of energy that can be used by biological systems2. Many organisms are not able to use the energy obtained from sunlight directly; however, plants are able to use this energy and convert it into chemical energy by converting CO2 (carbon dioxide) and H2O (water) to organic materials3. The energy source for photosynthesis comes from sunlight, which allows for the fuel that drives photosynthesis. This processRead MoreLab Report on Photosynthesis Essay1251 Words   |  6 PagesLab Report: Understanding Photosynthesis Gen Biology Lab Abstract: This lab was called photosynthesis: understanding photosynthesis. It is a highly complex process that needs to be broken down in many steps to understand how it works. This lab covers the big components in photosynthesis including carbon dioxide intake, light consumption, and varying pigmentation. Introduction: Photosynthesis is a huge concept to learn and understand in the field of biology. Plants have their own specialRead MorePhotosynthesis Lab Report866 Words   |  4 Pages Photosynthesis Lab 8 Section 022 Kaileen Savage Tanushree Majumber Introduction â€Å"Photosynthesis is a biochemical process for building carbohydrates using energy from sunlight and carbon dioxide taken from the air†, (Morris, J. (2016) Biology How Life Works. New York, NY.). It is a system that uses plants and specific algae to synthesize molecules from both water and carbon dioxide. The oxygen we breathe and the food we eat is fueled by photosynthesis because it is anRead MorePhotosintersis Experiment1317 Words   |  6 PagesMeasuring the Effect of Light Intensity on Photosynthesis Introduction Photosynthesis captures energy from sunlight. Plants, algae, and some bacteria use the energy captured during photosynthesis for their metabolic reactions. During photosynthesis in plants, chlorophyll and enzymes in leaves convert certain wavelengths of light into chemical energy. A simple equation can be used to represent photosynthesis. Enzymes and Chlorophyll light energy CO2 H2O carbohydrate O2 In this investigationRead MoreLeaflab Report Essay943 Words   |  4 PagesMarlena Ferone LeafLab Biology 101 - Professor Landry University of Phoenix Due Date: August 30, 2011 EXPLORATION What is the relationship between the increase in light intensity and the photosynthetic rate in leaves from a corn plant? How does this relationship compare with what you observed for tomato plants? As light intensity increases, the photosynthetic rate of a plant increases as well. However biochemical reaction, in fact, DO have temperature limits because if the temperaturesRead MoreLeaf Lab931 Words   |  4 PagesMarlena Ferone LeafLab Biology 101 - Professor Landry University of Phoenix Due Date: August 30, 2011 EXPLORATION What is the relationship between the increase in light intensity and the photosynthetic rate in leaves from a corn plant? How does this relationship compare with what you observed for tomato plants? As light intensity increases, the photosynthetic rate of a plant increases as well. However biochemical reaction, in fact, DO have temperature limits because if the temperaturesRead MoreWorld War Ii Through the 1970s627 Words   |  3 PagesENERGY IN A CELL Lab Name: Tigist Badeg Data Table. Step | Tile | 1. | Energy | 2. | H2O, CO2, Chlorophyll | 3. | Electron Transfer | 4. | ATP + NADPH | 5. | Calvin cycle | 6. | Glucose and O2 | 7. | Glycolysis | 8. | Pyruvic acid | 9. | Krebs cycle | 10. | ATP, H2O and CO2 | 1.What is the importance of the light and dark reactions in photosynthesis? In light reactions, light is absorbed by chlorophyll in the thylakoid membrane and energizes the electronsRead MoreIB Bio lab report on photosynthesis1509 Words   |  7 PagesThe effect of different coloured lights on the rate of Photosynthesis Objective: To find out which colour of light provides the best consequences for the production of oxygen/ the rate of photosynthesis Background: In photosynthesis, there are two main parts, including light dependent and light-independent reactions. Plants use the energy from light for producing sugar, which is being converted into ATP by cellular respiration. They also are the only organisms that produce oxygen along with glucose

Kate Chopin s An Hour - 1323 Words

Thesis The late 1800s was a time period in American history marked by increased immigration, industrialization, territorial expansion, urbanization, and political activism. In regards to political activism, the feminist movement grew as a result of major social, intellectual, political, economic, and cultural transformations that were occurring in American society. During this time period, women still couldn’t obtain an education because it was believed it would injure their brains; they couldn’t vote; they could be beat by their husbands; and they couldn’t hold property. Women were viewed as emotionally and physically weak, a reason that men used to justify the subjugation of women and their need for â€Å"protection† under an onerous marriage. In The Story of an Hour, through peculiar sentence structure, feministic themes, and irony, Kate Chopin portrays the resentment of women towards the oppressive institution of marriage through Mrs. Mallard’s joviality for her newly discovered freedom- a product of her husband’s assumed passing. Body Paragraph #1- Literary Device: Sentence Structure Kate Chopin commences the short story with â€Å"Knowing that Mrs. Mallard was afflicted with a heart trouble, great care was taken to break to her as gently as possible the news of her husband’s death† (66). A transparent view of this sentence simply reveals that Mrs. Mallard suffers from cardiomyopathy; that her husband has died; and that someone has taken care to gently inform her of the news.Show MoreRelatedKate Chopin s An Hour1812 Words   |  8 PagesAuthor Kate Chopin is famous for some of the most influential feminist stories and novels in the Western canon. â€Å"The Story of an Hour† is one such text. In this story, Chopin tackles many of the concerns that are essential to feminism, including the willpower and expression of a woman’s distinctive identity separate from the identity of her husband and the right of a woman to identify and experience her own interests. While there is an aspect of this story that is provocative, namely, that Mrs. MallardRead MoreKate Chopin s An Hour857 Words   |  4 Pagesunderstanding of how various emotions can effect an individual; this is a consequence of being human. The broad variety of different emotions that Kate Chopin fit into â€Å"The Story of an Hour† presents the story with a perspective that is very intelligible. While some readers may not understand what it is like to live a sheltered life due to marital convention, Chopin laid out the emotional path that the protagonist takes and simplified it into individual, coherent feelings that a woman in the late nineteenth-centuryRead MoreKate Chopin s An Hour899 Words   |  4 PagesThe author has to choose the gender of their main character, and by Kate Chopin choosing a woman it set a completely different mood to the story rather than it being a man. The time this story was written were women were suppose to be submissive and loyal to their husbands, caring and nurturi ng for their children, and well-bred, catering hostesses. If a woman were to overstep such boundaries, she would be considered unladylike, scandalous, or even immoral. Society looks differently upon a personRead MoreKate Chopin s The Hour1361 Words   |  6 PagesStory of the Hour† has been whether or not Mrs. Mallard was oppressed in her marriage or if she was depressed due to the lack of time she and her husband spent together. Time plays a crucial role in the story, from the time they have spent together, to the period of the story, and to the short time in which the story takes place. â€Å"The Story of the Hour,† is a story written by feminist author, Kate Chopin in 1894 that deals with marital instability from a woman’s perspective. Chopin, whose husbandRead MoreKate Chopin s An Hour1273 Words   |  6 Pagesthe probation to ban the consumptions of alcohol, because alcohol attributed to their husbands’ abusive behaviors. Three stories serve as grea t examples for how women were treated/viewed in overtime. One of those stories is the story of â€Å"An Hour†, by Kate Chopin, which shows us how shows us how women were in oppressive marriages and desired freedom. Another story called â€Å"Proof†, which was written by David Auburn, demonstrates the negative treatment of women in a male dominated work force. Finally,Read MoreKate Chopin s The Story Of An Hour1579 Words   |  7 PagesKate Chopin’s The Story of an Hour written in 1984 is a story of a woman who, through the erroneously reported death of her husband, experienced true freedom. Both tragic and ironic, the story deals with the boundaries imposed on women by society in the nineteenth century. The author Kate Chopin, like the character in her story, had first-hand experience with the male-dominated society of that time and had experienced the death of her husband at a young age. The similarity between Kate Chopin andRead MoreKate Chopin s The Story Of An Hour1336 Words   |  6 Pagesstatus in society as married women. In the story of an hour, the author, Kate Chopin describes the emotions of a woman who is married and tied down to this oath for the rest of her life. The author uses the ways of the society during that time to construct a story that accurately reflects the feelings of majority of women of that time. The goal of the story is to examine how women were indirectly oppressed during those times. The story of an hour is an interesting short story that begin with tellingRead MoreKate Chopin s Story Of The Hour Essay982 Words   |  4 PagesKate Chopin was an American author who wrote two novels that got published and at least a hundred short stories. In Kate’s short story The Story of the Hour she uses some of her traumatic event that happened in her lifespan in the short story even though it the story is fictional. A lot of her fictions were set in Louisiana and her best-known works focused on the lives of sensitive intelligent women. One-third of Mrs. Chopin’s stories are children’s stories. A lot of Mrs. Chopin’s novels were forgottenRead MoreKate Chopin s The Hour928 Words   |  4 Pagesâ€Å"The Story of The Hour† fully answers its title. It is a story about a woman living her last hour. Not so many things happen during that hour, but in contrast, many thoughts fly through main character’s head and a reader can form an accurat e portrait of a woman’s life from these thoughts. Somebody tells her that her husband is dead. After that she dives into the whirl of thoughts regarding the impact of husband’s death on her future. Some facts or beliefs make this woman think that her husband’sRead MoreKate Chopin s Story Of An Hour993 Words   |  4 Pageswriter’s base their stories of real life experiences and feelings. Kate Chopin largely based her stories off of her own life. Kate Chopin spent her childhood years in an alternative and matriarchal Louisiana town with a family that was unconventional. She challenged her nineteenth century sexist society and used her own life to put strength and feminism into her stories like â€Å"The Storm†, â€Å"Desiree’s Baby† and of course â€Å"The Story of an Hour†. She lived with her mother, grandmother and great grandmother

How to Catch a Fish free essay sample

Here is a list of essential items for fishing. 1. A fishing rod and reel. You can get this already put together and strung with line at a department store, sporting goods department or at the bait and tackle shop. Make sure the line is 8 or 16 pound test line or at least tested for well above the weight of any fish you plan to catch. 2. A lure and/or bait such as fishing worms. These can be bought at a bait and tackle shop or you can catch some worms yourself after a rain. Look up the bait shop in the yellow pages. 3. You will need a bobber or float if using worms. You will also need a bucket which you can fill with water at the lake, pond or river you plan to go fishing at. This is to keep your fish in once caught. If you think you may catch something pretty big you will want a stringer instead to string the fish on. We will write a custom essay sample on How to Catch a Fish or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page 4. You will need a fishing license and a copy of the local fishing laws to follow. 5. You will want to dress comfortably in clothes not easily snagged by hooks. How to fish. Once you have your equipment and have found a suitable place where fishing is permitted, you will want to get set up. Place the bobber on the line by pushing the button in on it that allows the wire to come out that wraps around the line. You’ll see what I mean. Position the bobber about 3 feet above your hook. Bait the hook with a worm by piercing the worm and working it over the whole hook to cover the hook completely. If you are using a lure you won’t need the bobber. You will need to have your area around you clear so as not to hook anyone. Push in and hold the button on the reel, draw back the pole and snap the end like a whip sending the hook out into the water and releasing the button as the hook is being propelled forward. You may want to practice with an object like a lure on the line before trying this with a hook to avoid complications, till you get the hang of it. When you believe you have a fish on the line, either by the bobber being pulled under or the line going out, draw up the line a little so that it will draw tight when you secure the hook in the fish’s mouth. Now be ready to wind the reel and jerk back tight on the pole securing the hook into the fish’s mouth. Keep the line tight and try to tire the fish out before bringing it all the way in. You can unhook the fish by hand or with a special tool if you want to purchase one. By hand you will hold the fish above the fins so as not to be stabbed by them. Squeeze the fish in such a way that the mouth opens wider. Look at how the hook is located in the mouth of the fish. Push the hook in till free then take it out of the fish’s mouth.

Tolkiens serious Essay Example For Students

Tolkiens serious Essay Rings well with Bilbos discovery of the ring of power (Kocher 11). Tolkien had trouble publishing this book at first, but obviously it later became a great success.  Tolkiens next and most famous book, The Lord of the Rings, begins with the discovery of the great ring of power. It begins with the passing of the ring from Bilbo to Frodo Baggins. This book is undeniably Tolkiens best work. His other books can be seen as support and basis for this novel. For this book he  received thousands of flattering letters, The Order of the British Empire (one level below knighthood), and recently a multi million-dollar movie trilogy based on his writings. Many critics believe the character Frodo Baggins in The Lord of the Rings is symbolic of Tolkien and his war experience. Both seem to have been aimlessly caught up in a bad situation, which came to them without any warning. Frodos adventures follow Tolkiens life pretty closely. Similar instances include wounds and camaraderie (Sale 27). This work is the classic example of a fairly unimportant and rarely recognized member of society who shapes the lives and fortunes of every character on Middle Earth. We will write a custom essay on Tolkiens serious specifically for you for only $16.38 $13.9/page Order now The Lord of the Rings was originally one book. When Tolkien was trying to get this book published, his publisher Raynor Unwin decided to split the book into three parts: The Fellowship of the Ring, The Two Towers, and The Return of the King (Belz 27). Tolkien really didnt like this idea but went along with it. The first of the three, The Fellowship of the Ring, tell of the ring coming to Frodo Baggins and the fellowship of men, dwarfs, elves, and wizards who will share the task of destroying the great ring. The second, The Two Towers, tells of the hardships of the journey and the classic heroic battles between good and evil. The final book in the series, The Return of the King, consists of the destroying of the great ring and the defeat of the evil forces of Middle Earth. This book in particular is filled with many dramatic ironies that are foreshadowed in the previous books. The Lord of the Rings is by far Tolkiens most popular work. It is commonly agreed that if Tolkien had lived longer he would have been knighted. Due to Tolkiens dislike of  publicity, it was said that it was harder to get an interview with him that the British Prime Minister (Belz 27). His last and least well-known work is The Silmarillion. This book basically tells the stories and history of Middle Earth. This book explains well how each race came about and depicts the setting for his other books. These books also contribute to the ironies of the previous books, and how more powerful forces control the characters. Although Tolkien does not call them gods, the controlling forces basically fit the names requirements. This book is an essential to any of Tolkiens serious readers. Even though Tolkien started this book as a young lad, he died before completing it. The book was finished and promoted by his son Christopher and has sold over a million copies.  In conclusion, Tolkiens works raised the bar for the modern fantasy field. His books will be hard for any upcoming writer in this field to match.