Prokaryotic vs Eukaryotic Cells - Free Essay Example

Sample details Pages: 2 Words: 519 Downloads: 7 Date added: 2017/09/17 Category Biology Essay Type Compare and contrast essay Did you like this example? In life’s hierarchy, cells make up the lowest level of organization. Cells can perform activities required to sustain life. A cell’s ability to divide to form new cells is the basis for growth and repair in organisms. Cells also play a key role in the recycling of carbon, a chemical element essential to life, and also participate in cellular processes such as photosynthesis. With these points in mind, it should be noted that cells come in one of two forms: prokaryotic and eukaryotic. By investigating the structural and functional similarities and differences of prokaryotic and eukaryotic cells and by exploring the process of endosymbiosos, one can gain further insight into the diversity of cells. One distinct difference between these cells is prokaryotic cells can be classified as either bacteria or archaea while eukaryotic cells make up all other forms of life including plants and animals. This distinction arises from the fact that prokaryotic cells are simp le, small, and mostly unicellular whereas eukaryotic cells are more complex, big, and generally multi-cellular. Eukaryotic cells have a membrane enclosed nucleus and many small organelles in its cytoplasm while prokaryotic cells lack membrane enclosed organelles of specialized form and function and a nucleus. Furthermore in a prokaryotic cell, DNA is not separated by a membrane bound nucleus; instead the DNA is concentrated in a region called the nucleoid. Another difference involves the way in which both the cells replicate. Prokaryotic cells reproduce through a process of cellular division known as binary fission. In binary fission one copy of the origin moves rapidly towards the other end of the cell. Once the origins meet on one side of the cell, the plasma membrane grows inward and a new cell wall is deposited. The result is two daughter cells. Eukaryotic cells reproduce through an evolved form of binary fission known as mitosis, in which spindles from outside the nucleus and break down into two separate cells, and meosis. Despite these major differences, both Eukaryotic and Prokaryotic cells have many structural and functional similarities. All cells are enclosed by a plasma membrane, filled with cytoplasm, that functions as a selective barrier. This barrier allows for the passage of oxygen, nutrients, and wastes between the cell and its surroundings. Another similarity is that both types of cells have chromosomes, ribosomes ( tiny organelles that make proteins via instruction from the genes) and protein lipids in their membranes. Both also have DNA strands which hold their genetic information. The evolutionary relationship between the both cells establishes how eukaryotic cells evolved from prokaryotic cells. Eukaryotic cells were created through a process of genetic exchanges between prokaryotes. This process is known as endosymbiosis. Two organelles which have directed this theory are the mitochondria and the plastids. Both of these organe lles are found in eukaryotic cells however research has shown that these structures are decedents of independent prokaryotic cells. Since Eukaryotic cells have the ability to engulf other cells, it can be concluded that the prokaryotic ancestors of the mitochondria and plastids gained entry into the eukaryotic cells which in turn formed into packages of vesicles. Thus, Eukaryotic cells were Don’t waste time! Our writers will create an original "Prokaryotic vs Eukaryotic Cells" essay for you Create order

Analysis Of The Poem Snow - 924 Words

True love is irresistible and regardless of obstacles and interferences from outside forces, undying affections still remain. In the third stanza, he uses a simile to compare how his lover can shut him down emotionally with how a rose closes in the winter time. He creates this beautiful image to represent his consistent and never ending love towards her. He says if he has to leave her, then he will be like a cold rose in a garden covered with snow. Such an image symbolizes dead or dormant love; the result of rejection and heartache from leaving her. Snow falls gently and silently, which enhances the beauty of the scene. The snow represents death and the end of a relationship. When winter comes, flowers wither and through personification, he compares the flower to his heart and says that when a flower detects snow falling, it closes off and eventually, dies due to the bearable conditions. Snow occurs during winter and winter strongly contrasts with Spring, which was mentioned in the previous stanza. Instead of the cycle of life, a resurrection, a relationship, and hope, there will be anger, resentment, discontentment, anxiety, anguish, or hatred from the cold that will displace it. He is willing to suffer, disappear, and deny his feelings just for her sake. Closing himself off from the world and shutting â€Å"very beautifully† (10) is not a sacrifice too big for him to commit because he is doing it out of love for her. So, like a flower, on the outside, he will appear fine, butShow MoreRelatedAnalysis Of The Poem The Snow Flower And Snow Flowers 1484 Words   |  6 Pagesas kindred sisters who are even closer than a husband and wife. Her laotong, Snow Flower, introduces herself by sending Lily a silk fan where she has written a poem in nu shu, the unique and secret language created by Chinese women. As the years pass, Lily and Snow Flower send messages on the fan and compose stories, on handkerchiefs, to share their hopes, dreams and accomplishments . Through the point of view of Lily, Snow Flower and the Secret Fan by Lisa See shows the pain, the hardships, and theRead MoreAnalysis Of The Poem Snow White 2692 Words   |  11 Pages SNOW WHITE Prologue: The Seed The stars glitter coldly, the frozen lake shines icily, the Queen looks on regally. Her hair is a star-filled night dotted with grey; her eyes are a cool, azure blue. A gleaming, nefarious smile lingers on her tightly drawn lips. Rise. She says, and a huntsman in front of her clambers to his feet. The huntsman is not at his best. He s haggard with traces of brown stubble appearing on his dark flesh. His usually lush hair is unkempt. My Lady, The huntsmanRead MoreJohn Greenleaf Whittiers Poem Snow-Bound: An Analysis of Romantic Poetry644 Words   |  3 Pagesnature, were also themes shared by all the romantic era poets. John Greenleaf Whittiers poem Snow-bound fills all the criteria for romantic poetry, and may even be the quintessential American romantic era poem. In Snow-bound, a family is trapped inside their New England cabin. They use the opportunity for self-reflection, musing on the past, and bonding over their experiences. Natural imagery pervades the poem, which is narrative in style and epic in scope. The snowstorm that prompts the narrativeRead MoreBilly Collins, analysis of his poems. Shoveling snow with Buddha, Victorias secret, and I Chop Some Parsley While Listening To Art Blakeys Version Of Three Blind Mice3082 Words   |  13 Pagesthe poem could be read like a novel. The other type brings humor and whimsy to his work, yet he hints at a seriousness that lies beneath the surface. Both styles of poetry are easy to read, but take a second look to realize what the Collins is intending the reader to understand. Billy Collins is an exceptionally talented poet whose writing at first can be taken to be a simple comedy but when read more carefully, it can be interpreted as a far more complex script. First readings of the poems I ChopRead More Analysis of Robert Frosts Stopping by Woods on a Snowy Evening832 Words   |  4 PagesAnalysis of Robert Frosts Stopping by Woods on a Snowy Evening Stopping by Woods on a Snowy Evening is a very well know poem by Robert Frost. The poem appears to be very simple, but it has a hidden meaning to it. The simple words and rhyme scheme of the poem gives it an easy flow, which adds to the calmness of the poem. The rhyme scheme (aaba, bbcb, ccdc, dddd) and the rhythm (iambic tetrameter) give the poem a solid structure. The poem is about the speaker’s experience of stopping by theRead MoreRobert Frost Explication Analysis1266 Words   |  6 PagesPoetry Explication Essay The poem Stopping by Woods on a Snowy Evening was published in Robert Frost’s New Hampshire in 1924 (Pritchard). The poem is among the most easily recognizable and familiar works written by Frost. On the surface, this poem is a short encounter at the edge of a snowy forest. Perhaps its outer simplicity is what makes the poem stand out in the minds of readers. The straightforward structure and balanced rhyme pattern make it easy to recite and the imagery Frost evokes is bothRead More Analysis of Robert Frosts Desert Places Essay1236 Words   |  5 PagesAnalysis of Robert Frosts Desert Places Robert Frosts Desert Places is a testament to the harrowing nature of solidarity. By subjecting the narrator to the final moments of daylight on a snowy evening, an understanding about the nature of blank spaces and emptiness becomes guratively illuminated. The poems loneliness has the ability to transcend nature and drill a hole through the mind of the narrator so that all hope for relationships with man and nature are abandoned. Read MoreAnalysis of Stopping by Woods on a Snowy Evening851 Words   |  4 PagesAnalysis of Stopping by woods on a snowy evening Stopping by Woods on a Snowy Evening is a very well know poem by Robert Frost. The poem appears to be very simple, but it has a hidden meaning to it. The simple words and rhyme scheme of the poem gives it an easy flow, which adds to the calmness of the poem. The rhyme scheme (aaba, bbcb, ccdc, dddd) and the rhythm (iambic tetrameter) give the poem a solid structure. The poem is about the speaker s experience of stopping by the dark woods inRead MoreWinter: A Magical Time of Year809 Words   |  3 Pageswinter as my theme for a number of reasons. Winter is when nature sleeps, or dies, waiting for spring to come. Also, winter is great because of snow and the cold weather. Winter is a great time to just sit inside by a fire and read a book. The peace and quiet of winter is also what makes it one of the best seasons of the year. The analysis of the following poems â€Å"Now Winter Nights Enlarge† by Thomas Campion, â€Å"Stopping by Woods on a Snowy Evening† by Robert Fros t, â€Å"Like Brooms of Steel† by Emily DickinsonRead MoreAnalysis Of The Poem For The Union Dead 1412 Words   |  6 PagesThe poem â€Å"For the Union dead† by Robert Lowell is one of the writings whose title is exquisitely regarded. Commencing as a private meditation of his childhood the poet flashbacks on the commitment of Colonel Robert Shaw a union officer who was assassinated during the battalion of the black soldiers during the time of the civil war. Altering from the historical ancient and modern analysis, the poet is depicted lamenting that the heroic nature in the Contemporary America has been eroded. The contemplation

Role of Government in Economics - 1028 Words

Role of Government The government provides the legal framework and the services needed for a market economy to operate effectively. The legal framework sets the legal status of business enterprises, ensures the rights of private ownership, and allows the making and enforcement of contracts. Government also establishes the legal rules of the game that control relationships among business, resource suppliers, and consumers. Discrete units of government referee economic relationships, seek out foul play, and impose penalties. Government intervention is presumed to improve the allocation of resources. By supplying a medium of exchange, ensuring product quality, defining ownership rights, and enforcing contracts, the government increases†¦show more content†¦The main categories of Federal spending are pensions and income security, national defense, health, and interest in the public debt; Federal revenues come primarily from personal income taxes payroll taxes, and corporate inco me taxes. Each state derive their revenue primarily from sales and excise taxes and personal income taxes; on the other hand, major state expenditures go to education, public welfare, health and hospital, and highways. Local communities derive most of the revenue from property taxes; education is their most important expenditure. Over the years, the tax collections of both state and local government have fallen substantially short of the expenditures. Such shortfalls are largely filled by Federal transfers or grants. It is not common for 20 to 25 percent of all revenue received by state and local government to come from the Federal government. In addition, to Federal grants to state and local government, the states also make grants to local governmental units. According to the U.S. Department of Information Programs, America points to its free enterprise system as a model for other nations. The country s economic success seems to validate the view that the economy operates best when government leaves businesses and individuals to succeed -- or fail -- on their own merits in open, competitive markets. But exactly how free is business in America s freeShow MoreRelatedThe Government Should Play an Active Role in Managing an Inflationary Economy983 Words   |  4 PagesThe government should play an active role in managing an inflationary economy. I agree that the government should play an active role in managing an inflationary economy. 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Such economic growth owes not only to economic reform began at the end of 1978, when the third session of the Central Committee of the 11th National Congress of Chinese Communist Party was held and later regarded as a landmark in the existing Chinese history, but also to administrative reform accompanying with economic reform. Administrative reform has beenRead More Asian Essay946 Words   |  4 PagesMarkets The Asian financial markets can be compared to the economic philosophy of mercantilism, which is regulated commerce to produce a favorable balance of trade. Governments regulate production techniques to ensure the quality of exports, and in general, subsidize production in their exporting industries. Tariffs can be high on imported manufactured goods and low on imported raw materials. 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The Unites States Constitution was created in 1787, and is the supreme law of this nation. It is the backbone on which laws to follow and how we live today. There are six characteristics of a market economy. Which as follows; Private property, Freedom of enterprise and choice, Motive of self-interest, competition, markets and prices and limited role of government. One of the first economic concepts is â€Å"Freedom of Enterprise

My Antonia class system Essay Example For Students

My Antonia class system Essay In My Antonia Willa Cathers seems to target the differences between the western, pioneer, farmer and the eastern, industrial, businessman. This contrasting seems to peak in the span of two paragraphs at the end of book four where Cathers injects a passage wrought with imagery and personification to relay her message. Here, the reader is placed into the mind of Jim Burden, the main character, during a period in his life when he is to choose the person him will grow up to become. Cathers exposes the conflict going on inside him as he struggles between choosing the eastern life expected of him or the western life he has wanted. Jim Burden is a young man at this point with a Harvard Law education, the promise of a good job, and the implication of financial success. He would settle for nothing less at this point in his life had it not been for the success he had seen around him in people like Lena, Tiny, and Mr. Harling amongst several others. However, in this passage, as his last meeting with Antonia before he leaves to the east comes to an end, he says, I wish I could be a little boy again, and that my way could end there. (251) He reveals that he longs not for his financial success but rather for something else, he tells us that he desires something he once had. Jim also says, I felt the old pull of the earth, the solemn magic that comes out of those fields at nightfall. (251) In this personification of the land Jim makes the west sound like someone he wants to be with. He describes the land as a magical person pulling to keep the two together. As a child Jim was entrenched in the land in the west no matte r what he was doing and now he longed to have that companionship back. This longing reveals the conflict Jim sparked when he chose to explore a life as a businessman, or more specifically a lawyer, in the east. Cathers uses imagery in the first part of this passage to do an incredible job of capturing this battle inside him. Cathers writes, As we walked homeward across the fields, the sun dropped and lay like a great golden globe in the low west. While it hung there, the moon rose in the east, as big as a cart-wheel, pale silver and streaked with rose color, thin as a bubble or a ghost-moon. (251) Jim sees his two paths in the sky. He sees the golden light of the life, the pioneer spirit he so wants to have in the west while at the same time he sees the ghost-moon, the less luminescent light, he is expected to follow in the east. The seasonal colors Cathers uses here to describe the scene give us an idea of the emotions Jim is feeling at this point. She calls the sun golden like the summer when things are always well, crops are good, and spirits are hig h in the novel. The moon, on the other hand, is a pale silver color like the winter when times are bad throughout the book. We see here what Jim truly desires. Cathers finished the paragraph by saying For five, perhaps ten minutes, the luminaries confronted each other (251) We find that the choice of either one of the lifestyles is of astronomical size for Jim and also that the conflict is brief. Cathers alludes that the choice has already been made; the sun will always set in the west while the moon will continue to rise in the east. Even though the choice is made there is a brief moment where Jims longing for the west prolonged the movement of the two giants. Ultimately, however, Cathers tells us that Jim is not strong enough to change of course of the planets. .ubd1af1af156dc4abad592b62f7007430 , .ubd1af1af156dc4abad592b62f7007430 .postImageUrl , .ubd1af1af156dc4abad592b62f7007430 .centered-text-area { min-height: 80px; position: relative; } .ubd1af1af156dc4abad592b62f7007430 , .ubd1af1af156dc4abad592b62f7007430:hover , .ubd1af1af156dc4abad592b62f7007430:visited , .ubd1af1af156dc4abad592b62f7007430:active { border:0!important; } .ubd1af1af156dc4abad592b62f7007430 .clearfix:after { content: ""; display: table; clear: both; } .ubd1af1af156dc4abad592b62f7007430 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .ubd1af1af156dc4abad592b62f7007430:active , .ubd1af1af156dc4abad592b62f7007430:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .ubd1af1af156dc4abad592b62f7007430 .centered-text-area { width: 100%; position: relative ; } .ubd1af1af156dc4abad592b62f7007430 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .ubd1af1af156dc4abad592b62f7007430 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .ubd1af1af156dc4abad592b62f7007430 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .ubd1af1af156dc4abad592b62f7007430:hover .ctaButton { background-color: #34495E!important; } .ubd1af1af156dc4abad592b62f7007430 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .ubd1af1af156dc4abad592b62f7007430 .ubd1af1af156dc4abad592b62f7007430-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .ubd1af1af156dc4abad592b62f7007430:after { content: ""; display: block; clear: both; } READ: The Renaissance and its Humanistic Principles Essayâ€Å"As we walked homeward across the fields, the sun dropped and lay like a great golden globe in the low west. While it hung there, the moon rose in the east, as big as a cartwheel, pale silver and streaked with rose color, thin as a bubble or a ghost-moon. For five, perhaps ten minutes, the two luminaries confronted each other across the level land, resting on opposite edges of the world. In that singular light every little tree and shock of wheat, every sunflower stalk and clump of snow-on-the-mountain, drew itself up high and pointed; the very clods and furrows in the fields seemed to stand up sharply. I felt the old pull of the earth, the solemn magic that comes out of those fields at nightfall. I wished I could be a little boy again, and that my way could end there.†