Polytechnic University of the PhilippinesFinal Requirement and ExaminationName (Surname, First Name/s, Middle Initial) Course, Year and Section Student NumberEmail Address General Direction/Instruction: Read the instructions and questions well. Supply the necessary answers demanded in one rtf file, named after your surname. Use the format in this questionnaire. Feel free to use more space or add pages.Plant a tree and document the activity. One tree per individual person (20pts)Identify the species name and common name of the tree to be planted(Species) Syzygium myrtifolium (common name) EugeniaPhotograph the seed, seedling, or nursed plant before planting.Take a photo of the exact area for planting before the activityTake a photo while planting the tree (digging, embedding, and application of organic soil fertilizer like compost)Take a selfie with the planted tree when it is at least 10 cm. tall.Modified Essay. Identify and enumerate the biotic and abiotic factors that are necessary for the survival of the tree. (10 pts)The tree survived the ecosystem because of the components that exist as it grows. The sunlight, water, soil (Edaphic factors), minerals, and rocks were some of the most noticeable factors that affected its growth. There was no necessary type of soil needed for a Eugenia, as long as the soil is not dry. And it is needed to be watered everyday and absorb sunlight. Temperature, wind, sun, precipitation, and humidity, called meteorological factors, were also necessary in its deveopment, same with Carbon dioxide and other gaseous materials. For its biotic factors, the earthworms that fertiles the soil, any animal that gives off carbon dioxide, and the bacteria in the decomposed manure were also necessary for its growth.Essay. What are the general benefits from one tree? (5 pts)One single tree absolutely gives you limited benefits than what a forest or a group of trees may provide you. Bet even if they are alone, they still have priceless worth for its benefits. It can provide shelter and warmth, and/or can be your rendesvouz for an informal meeting, since it is also providing shed. It bears fruits, could be a source of food good for snack, or merely make it medicinal. Since it takes off oxygen, you can create fire beneath its leaves. You can also have some fun climbing it up or staying beside it. It can absorb an average of about 10 kg of carbon dioxide (if it is broad leafed) a year. And last, its roots can absorb excess water or simply small floods. Essay. Describe the benefits from a forest. (5 pts)We, people, already have an inherent concept understanding that forest is the lungs of the earth, and it works against climate change by stabilizing the climate in general. It regulates the water cycle by absorbing and redistributing rainwater equally to every species living within its range, which is known as the economy of water. Generally, forests provide perfect habitats for life to prosper on land. For a clear enlisting of the benefits from a forest, see below.Reduce flooding and low flow events by intercepting runoff and encouraginginfiltrationmprove water quality by slowing the rate at which rainfall runoff flows to riversand streams and trapping, using, or breaking down some of the pollutants andnutrients that are harmful to water qualityImprove water quality by lowering water temperatures with shade over streamsProvide fallen leaves to feed soil and aquatic organismsImprove groundwater quality by increasing the amount of rainfall runoff thatpercolates into the soil and replenishes our main source of drinking water, and bybreaking down or capturing toxinsImprove air quality, especially in the summer when air quality is oftencompromised, by lowering temperatures, filtering dust, and absorbing ozone,carbon monoxide, sulphur dioxide, nitrogen oxides, airborne ammonia, and heavymetals, and by releasing oxygenHelp counteract the greenhouse effect and global climate change by taking carbonout of the atmosphere and storing it in the form of wood, and by reducing winterheating and summer cooling energy demandsReduce erosion and help the soil recuperate where trees are plantedReduce summer temperature extremes and air conditioning costs by providingshade and the cooling effects of evapotranspiration, particularly in the citiesReduce winter discomfort, energy loss and heating bills, and snow movementwith windbreaksIncrease crop and livestock productivity and soil sustainability by sheltering fieldswith windbreaksDiversify the rural economy by providing income (or savings) from harvestingforest products such as firewood, fence posts, maple syrup, pulpwood, and lumber(over 5,000 products are derived from trees)Provide homes for wildlifePreserve and increase the diversity of plants and animals (biodiversity) which inturn improves the overall health of the community ecosystemLink natural areas together with plantings to provide travelways for wildlifeIncrease the beauty of the environment in our communityEncourage healthy open-air activitiesProvide living laboratories and outdoor classroomsReduce glareFilter out harmful UV raysProvide a calming environment by absorbing noise and improving aesthetics,resulting in less stress, less crime, and traffic calmingProvide food, medicinal ingredients, herbsProvide an opportunity for healthy community action and involvementIncrease property valuesProvide a sense of placeContribute to a quality of life that makes the area a desirable place to live and toestablish enterprisesProvide spiritual and creative inspirationAccentuate the seasonsWhat type of organism or species is the keystone in the whole worlds ecology in all its history? (10 pts)According to Nature.com, Keystone species are species that play a disproportionately large role in the prevalence and population levels of other species within their ecosystem or community. Without these keystone species, a significant dramatic changes in the ecosystem might occur. In the whole worlds ecology, I would say that the keystone species are the bacteria. When the earth was first created, bacteria were present, and were making more and more bacteria. Bacteria were the first to conquer the world and still conquering. But since we are not just talking about its quantitative factor, bacteria also has the dominant effect on earth. First, its function, which cannot be enumerated one by one for there were millions and billions of bacteria whove been having different functions. But one of its given functions is to decompose. Decompositionis the process by which organic substances are broken down into a much simpler form of matter. The process is essential for recycling the finite matter that occupies physical space in the biome. Bodies of living organisms begin todecompose shortly after death. From here, we can say that without bacteria, there would be no decomposition, no new plant, no cycle, and therefore, no life at all. On the other hand, the bad bacterias were also responsible for changes in the ecosystem. Even those bacteria that can make one sick, when disappeared, will have necessary changes not just within an individal but also in his society/ecosystem. As a generalization, bacteria were the keystone species on earth of all time, which when imagined to be on the top of an arch, were the most necessary for having the worlds foundation, strength and form.Bonus essay points. As a student, what can you best contribute in maintaining a sustainable ecology? (Practicality, 5 points; Impact, 5 points)In my 17 years of existence in this ecology, I might have already used thousands of energy and resources. But what am I thinking about is, if I used that amount of energy, what more about the whole earth. Isnt it much devastating to the environment? So now, Ill start from myself. From the very beginning of the day, I will never forget to turn off any appliances and unplug them. Then, when brushing my teeth, I will use glass to save water, and also not taking a bath for too long. In my workout routine, I will not use any electronic exercise equipments, since it is also good to use body weight. In ironing clothes, Ill polish my attires for the entire week once. If I am to go somewhere not so far, Ill have my bicycle ride or walk down the street. When buying, I will never request for a plastic bag. Ill use eco-bag or paper bag. In eating, Ill try to take less meaty and dairy products for they are highly-resource intensive and inefficient. I would even have healthier body if I eat vegetables. In my things, Ill search for what chemicals or things itself were harmful to environment, Ill be knowledgeable enough to be able to omit my things that are risky to ecosystem. Ill use reusable bottles for drinking when not at home. In doing projects or anything, Ill apply the 3 Rs: Reduce, Reuse, Recycle. Whenever weve given the chance, Ill encourage my parents to install skylight and solar tubes, and use solar energy. Ill try to suggest to my family to have a garden which could also be a business. Last, Ill try to read more, and acquire knowledge about what harms our ecosystem and whats good for it, which I will consequently share to other so they could apply it to themselves and we all could spread the word. If all guys of earth would also be like this, there might still be a chance to diminish the pollution and escape from this partially unstained ecology.