This website uses cookies to ensure you have the best experience. Learn more

How Did Life On Earth Begin

2603 words - 10 pages

Life as defined by Knoll, a profesor of Biology at Harvard, is a system in which proteins and nucleic acid interact in ways that allow the structure to grow and reproduce (2004). Or in other words, one can describe life as having these six features; i) have carbon as a driving force, essential for it to grow and being able to make copies for itself and also must have the ability to convert the inorganic sources like carbon dioxide into organic molecules, in the case of hetrotrophics. ii) metabolism, a catalysis-based reactions that occur in a body or system. iii) replication, as a starting point of heredity. A life must be able to pass its structural or functional codes to the next generation. iv) cell compartmentalisation, which makes a life distinguishable from the environment. v) energy as power source. Back to early life, this comes from the disequilibria from the environment, that drive things to move forward. vi) excretion, waste disposal must be continuous to prevent it from being accumulated and ensuring forward momentum.

The earliest paleantology evidence of life on earth dated back 3.2 million years ago, where they discovered microbes in the rock formation of the Transvaal (Grasse P.P., 1977). These organisms may have employed amino acids, or maybe proteins contained in the sea sediments. More than that, photosynthetic organisms, primarily known as cyanobacteria, a green-blue algae was also found fossilised in stromatolite more recent (2.3 billon years old) near the shores of Lake Superior in Canada. The presence of specially-structured cells, with nucleus and chromosomes (which contain DNA) in this algae, definitely display similarities with all life today. Thus, to suggest the first forms of life, one has to imagine a much more simpler form from what we can see nowadays, but still can fit to the definition. Nucleic acid, which able to replicate itself and catalyse some chemical reaction is one of the possible suggestion.

Darwin's “warm little pond” conjecture inspires other scientists to develop various theories on the synthesis of amino acid, as the basic units of life (Scott.A.,1986). The first premordial soup theory came from Haldane and Oparin in 1920 who suggested that life was incubated in chemicals brew during the early earth, in a hot environment. Following this there were many other biosynthesis experiments but one thing in common is that all of them were aware of the importance of water as a medium, despite many settings of the chemical brew. Stanley Miller then further reinvent the premordial soup in laboratory (Miller S.L., 1953). What he had done was that in a flask of ammonia, methane, oxygen and other gases that he believes exist in the early earth, he supplied an electric spark to trigger lightning for a few weeks and that produces 11 of 20 amino acid used by life on earth among others things. The theory goes and after sometime, these organic molecule self-assembled and eventually form microscopic blobs;...

Find Another Essay On How Did Life on Earth Begin

Report on the Religious Life on Planet Earth

967 words - 4 pages Report on the Religious Life of Planet EarthReport on the Religious Life on Planet EarthxxxxxxxxxProfessor Philip VanVleckWorld ReligionsNovember 8, 2012Report on the Religious Life of Planet EarthThis is a report based on my research and findings on whether planet Earth is a religious planet or not. In order for me to start my research I had to find out what makes a person religious and the definition of religion. Religion is a collection of

Popular Theories of the Origns of Life on Earth

1001 words - 5 pages diversity of bacteria in approximately 0.1 billion years is a mystery phenomenon that even evolution cannot explain. Till today, there have been no complete understanding of how the origin of life began. There have been various theories proposed by experts such as life began in the oceans, life began on land and perhaps life did not begin on Earth at all etc. In this essay, three of more popular theories will be discussed. The first theory to be

Microbiology: Microorganisms That Co-exist With Life on Earth

1145 words - 5 pages A diverse collection of microorganisms co-exist with life on Earth; most of them as inhabitants among plants or oceans, many as normal flora in humans, and some in remote locations in the most extreme habitats. Despite being ubiquitous in nature and typically harmless, bacteria get particular attention for causing disease in humans. Correct identification of a microorganism allows for proper investigation of a particular species, and prevention

How Far Did WW1 Change Life In Britain

1171 words - 5 pages How far did WW1 change life in Britain?Lauren CannonWorld War One certainly changed life in Britain, each class was affected by the war which they though would be over by Christmas. The shock was that it lasted for four long years where the men at war weren't the only ones suffering, there are many factors that affected this such as food and women.There were issues with food for the people in Britain, within less than year there were already

Change of Perspective from City Life to Country Life based on American Earth by Barbara Kingsolver

734 words - 3 pages children have grown up surrounded by streetlights for trees and pavement for grass. She explains that she lives a “cabin build of chestnut logs in the late 1930’s,” (American Earth pg. 939) and then goes on to describe how the drizzle of rain enhanced the overall beauty that was to be found in the environment surrounding her house. Imagery used in this depiction include: “listening to the woodblock concerto of dripping leaves… and the wood

The Permian-Triassic Extinction Event and It's Effects on Life on Earth

1823 words - 7 pages Introduction The Permian-Triassic extinction event is undoubtedly the largest extinction event the Earth has ever seen. While evidence shows that it occurred over a great amount of time, it was effective in causing the extinction of an incredibly large portion of life on Earth. To such an extent that it took millions of years before any large amounts of biodiversity occurred again. This is why it is also referred to as the ‘Great Dying’. This

"The Good Earth" essay. A Chinese book of a farmer's hard life working on the land

1035 words - 4 pages Chapters 1-13 EssayThe Good Earth is a Chinese book of a farmer's hard life working on the land. Ittells of the farmer's good times and bad times, and all through this there is alwaysthe good earth that produces his crops that he may eat or sell to make money.Chapter 1: Wang Lung is on his marriage day. He wakes up apon a bright andglorios morning. Wang does his normal chores in the morning and also takes abath and gets a hair cut. He is glad

How did the planets of the solar system come about? How did the atmosphere change and evolve through time? What where the major geological and biological events of Earth history?

620 words - 2 pages are common form that era are the stromatolites. These are layers of calcium carbonate, a material that is deposited by algae. It is similar to the deposits that are produced by modern algae. The Paleozoic era is the era when life on Earth explodes. The first life forms with hard parts start appearing. This lets us study the better preserved fossils that are left behind. A lot of invertebrate groups start evolving. Trilobites brachiopods, and

How did the Second World War Affect Family Life in Britain Between 1939-45?

1943 words - 8 pages How did the Second World War Affect Family Life in Britain Between 1939-45?The Blitz comes from a German word meaning lightning. It was the sustained strategic bombing of the United Kingdom by Germany during the Second World War. Between 7 September 1940 and 21 May 1941 there were major raids (attacks in which more than 100 tons of high explosives were dropped) on 16 British cities. Over a period of 267 days (almost 37 weeks), London was

How Did Eleanor Roosevelt’s Personal Life Relate to Her Choice of Dedicating Her Life to Helping Others?

1777 words - 8 pages “General Assembly of the United Nations” adopted the Universal Declaration of Human Rights. Eleanor Roosevelt’s quest to find equality among all races and her idea of fairness had finally been fulfilled. The following quote is Eleanor Roosevelt’s thoughts about universal human rights. "Where, after all, do universal human rights begin? In small places, close to home - so close and so small that they cannot be seen on any maps of the world. Yet they

Skeleton's in the Closet. A creative imaginative story about a deadly disease threatening to kill all life on earth

1353 words - 5 pages blue little man with three arms was walking towards Fred, and Fred recognized him as a Neptunian (from the planet Neptune). The little man was holding in one hand a vial, the his second hand a file full of documents and proceeded to shake Fred's hand with his third hand. The man went on to say, "I give you this vial and documents which will instruct you on how to eliminate 'kills all' disease which plagued Earth. I give you this because your heart

Similar Essays

Life On Earth Essay

1160 words - 5 pages , for once, not alone. I felt like I had a purpose. Like God was supposed to make me feel. My job was to dig up holes the size of coffee cans. I would stick the coffee can into the dirt, lift it back up, and dig a hole the size of the imprint. Grandma would then place a seed into the hole and I would fill it back up with soil. Grandma was always happiest planting the seeds. She said it was as if she was giving life to the earth. After coming

Life On Earth Essay

1950 words - 8 pages while humans maintain their way of life? Biodiversity is the biological diversity of life on earth. This includes varied ecosystems like forests, as well as the diversity of species of plants, animals, and microorganisms, and the multifariousness of genes in these species (Shah). All species have an important function to increase the success of its ecosystem. For example, the more varieties of plants there are on the planet, the more food there

Prelim Life On Earth Study Notes

4779 words - 19 pages ) Analysis the oldest sedimentary rocks provides evidence for the origin of life 1.1) Identify the relationship between the conditions on early earth and the origin of organic molecules Describe the first + second atmosphere and how relates to origin of organic molecules Describe hypothesized environment and conditions of early earth Compare to earths present day atmosphere when solar system formed earth gained

A Brief History Of Life On Earth

521 words - 2 pages Life is valuable to all of us, but how it began is not something many people are interested in discussing. This is a brief summary of one version the history of life on Earth, agreed on by most biologists.The Earth's crust formed about 4.5 billion years ago. There are various theories as to what it was that caused the first prokaryotic cells to form 700 million years later. Unfortunately, Scientists have not agreed on what it was. Roughly two