Cellular Respiration and Photosynthesis

Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the fuel used by all living things. The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. Most of the time, the photosynthetic process uses water and releases the oxygen. Cellular respiration allows organisms to use (release) in the chemical bonds of glucose(C6H12O6). The energy in glucose is used to produce ATP. Cells use ATP to supply their energy needs. Cellular respiration is therefore a process in which the energy in glucose is transferred to ATP. In respiration, glucose is transferred to ATP. Oxidized and thus releases energy. Oxygen is reduced to form water. In Photosynthesis, plants use the suns energy as light to transform carbon dioxide and water into glucose. In cellular respiration, glucose is ultimately broken down to yield carbon dioxide and water, and the energy from this process is stored as ATP molecules. The equation for photosynthesis is: 6CO2 + 6H2O + energy 6O2 + C6H12O6 and cellular respiration is: 6O2 + C6H12O6 6H2O + 6CO2 + energy The reactants in the photosynthesis process stay on the left, they are 6 molecules of water (H2O) and 6 molecules of carbon dioxide. The products are 6 molecules of Oxygen and glucose. In the cellular respiration the reactants are 6 molecules of Oxygen and glucose, and the products are 6 molecules of water + 6 molecules of carbon dioxide. As we can see the cellular respiration is the opposite equation of the photosynthesis. All life depends on these reactions because we need oxygen, and this oxygen comes from the plants that releases it from photosynthesis. And we all need energy to function. We get this energy from the foods we eat. The most efficient way for cells to harvest energy stored in food is through cellular respiration.

Choose any topic and story Essay Example | Topics and Well Written Essays - 250 words

Choose any topic and story - Essay Example As Matt orders Richard around with a gun pointed at him, Richard reveals to him that he wanted to get back with his wife, but Frank was â€Å"always with her† (Dubus). In order to get back with Mary, Richard thinks that he must completely remove the hindrance to their marriage, who is Frank. At the same time, Matt tells Willis that his wife, Ruth, is always crying because she keeps on seeing him around. Matt also thinks that though Richard might be jailed for twenty years, he will be young enough to continue his life after prison life, unlike his son, Frank, who is already dead. Matt justifies that killing Richard will give peace to him and his wife. Emily, on the opposite, does not kill for revenge, but to avoid the misery of loneliness. She does not want to be alone again, so she poisoned Homer when she believes that he is about to leave her, instead of marrying her. Emily has lived a long, lonely life because of her domineering father who drove all her suitors away and Homer might be her only companion in life. Emily also lacks friends because people think that the Griersons are full of pride because of their social class. Without Homer, she will be lonelier since she already experienced what it means to be loved and to love, so she kills him so he can be with her forever. Despite this difference, Matt and Emily are also selfish in their motivations. Matt wants to kill Richard even when he feels guilty over it. He knows that it is wrong to take another man’s life, but he wants to do it to erase his guilt for not taking care of his kids well as he used to when they were younger. Emily is also selfish because she wants to control Homer for eternity. Hence, there is a difference in the exact motive for their killings, but Emily and Matt both did it for selfish reasons too. I feel more empathy for Matt than Emily because I cannot imagine losing my own child at such a young age. Frank is at the prime of his life. He has

Causes of Salem wWtch Trials Research Paper Example | Topics and Well Written Essays - 750 words

Causes of Salem wWtch Trials - Research Paper Example There was an influx of refugees in Salem village because of war outbreak in 1689, between the English rulers (William and Mary) and France. This made life too hard in this village, as people struggled with the available scarce resources for survival (Blumberg, 2007). In addition to this, the villagers faced diseases, harsh winters and crop failure. The Puritans believed that good fortunes always came from God and were a blessing to them, while bad fortunes were associated with the devil’s work. These people believed that witches were people who had deals with the devil and received powers from the devil in return, for doing evil. According to Puritans, a convicted witch was sentenced to death because it was believed that they could destroy communities and corrupt good Christian people. Although the Puritans had over the years believed in witches, everything changed in 1692, when witch hunt widely spread for the first time. The village of Salem was the centre for accusation. Th is was after two girls, Betty Parris who was 9 years old, the daughter of Reverend Samuel Parris (the first ordained minister in the village), and his niece, Abigail Williams 11 years old accused three women of casting spells on them. Two of the women were Puritan women and the other one was a slave woman. The two girls suffered from a strange sickness, acted oddly, had incomprehensible speech and their bodies were twisted from their original positions into uncomfortable ones. When the girls were diagnosed, there was no reasonable diagnosis found. The doctors tried to search in their medical books but it was unsuccessful. This worried the villagers and made them search desperately for an explanation. It was then that it was concluded that the girls were under the spell of witchcraft by their fellow community members (Yolen and Stemple, 2004). The three women were arrested on February 29 and more than 150 other â€Å"witches† were also arrested and put on trial. By late Septem ber 1692, some had already been put to death and more others died while in jail. During this period, people fasted and prayed for the girls for God’s intervention but it did not succeed. However, although witchcraft began in Salem village making it very famous in rounding up accused witches, the fear of witchcraft increased over the following year. This made the life there more difficult with neighbours rising against their fellow neighbours as others tried to prove the innocence of their dear ones, the accusers worried of what would befall them while the leaders struggled to understand the happenings (Doeden, 2011). In early 1970s, psychologist Linnda Caporael, now a behavioural psychologist at New York's Rensselaer Polytechnic Institute, began to investigate the Salem Witch trials while still a college student with no idea that a common grain fungus could have been the cause of the 1962 events. In 1976, he came up with a theory, which believed that a certain type of food po isoning called convulsive ergotism might have been responsible for the girls’ condition. Convulsive ergotism occurs when a person consumes rye crop- wheat containing a mould called Ergot, which was used to make bread. This causes hallucinations, vomiting, crawling sensations on the skin among many other symptoms similar to those reported in Salem witchcraft trials. It was also discovered that, ergot thrives in damp, rainy springs,