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

Speciation Essay

609 words - 3 pages

Speciation
Speciation is known to take place in two general ways. Species are known to change over time into something that is so extremely different they are considered a completely different species. In other words, a species can change so drastically that it splits into two separate groups that no longer share a similar gene pool. In each case of speciation, reproductive isolation occurs. Even for a single definition of species, there are many ways for speciation to occur. Under the biological species concept, speciation is the evolution of one or more reproductive isolating mechanisms. Under the cohesion species concept, speciation is the evolution of isolation or otherwise distinct ...view middle of the document...

d.). This type of speciation often occurs because of polyploidy, when a group of offspring is produced with two times the normal number of chromosomes. When a normal organism contains two chromosomes (diploidy), there new offspring contain four chromosomes (tetraploidy). This creates reproductive isolation because a diploid organism is unable to mate with a tetraploid organism (Stebbins Jr., n.d.). Since sympatric speciation is uncommon, it occurs in plants because they generally fertilize themselves. Tetraploidy plants can reproduce with other tetraploidy plants of the opposite sex, allowing them to form a new species.
Allopatric speciation is a more common type of speciation, and this occurs when the species become isolated geographically. Once populations gap, or separate, the gene flow becomes nonexistent. The two populations that were separated become genetically different over time, due to natural selection in the different regions. However, if the species population is small, enough they can experience something known as the founder effect. Meaning the genetic diversity is reduced...

Other assignments on Speciation

Economy Effect Of Marijuana Essay

277 words - 2 pages Modern American History by Alan Renga 2nd Mid Term! You will be given 3 Short Essay questions and 20 Multiple Choice questions deriving from this list! 80 points total! The 1920s Warren Harding then Calvin Coolidge Tea Pot Dome 1st Red Scare Immigration Restriction, Sacco and Vanzetti Langston Hughes, Marcus Garvey, KKK Prosperity, advertising Prohibition, Al Capone Flappers, Clara Bow, Rudolph Valentino Babe Ruth, Jack Dempsey

The Vc Shakeout Essay

2033 words - 9 pages ECONOMY 26 Luring a big firm to town is not the secret to job growth DEFEND YOUR RESEARCH 30 Are morning people wired for success? VISION STATEMENT 32 The social web’s east-west divide COLUMN 38 Warren Bennis looks back on his surprising path to fame New Thinking, Research in Progress hbr.org New Thinking, Research in Progress hbr.org FIRST The VC Shakeout Venture capital hasn’t worked for a decade and must be radically

Hospitals Paper

6014 words - 25 pages I hope to provide in this paper a comprehensive understanding for what the term “hospital” has become. Hospitals are an extremely complex system that man has created and shaped and reshaped throughout history. My goal in writing and researching this paper will be to provide those who read it a clear understanding on how the hospital system got to where it is today, and to shed some light on the many organizations that affiliate with and

Course Syllabus

2610 words - 11 pages [pic] COURSE SYLLABUS Semester: Fall, Year: 2012  College Mission Statement Richard J. Daley College provides high-quality education which leads to academic success, career development, and personal enrichment that fulfill diverse community needs. Mathematics Department Mission Statement Our mission is to deliver excellent service and to provide learning opportunities by offering a wide range of mathematics courses, which will help our

Management

1477 words - 6 pages Boeing Management Planning Heather Oetzel MGT 330 October 22, 2012 Joe Cheng Abstract Boeing is known as “the world’s leading aerospace company and the largest manufacturer of commercial jetliner and military aircraft combined ("The Boeing Company: About Us", 2012). Every company uses different types of management techniques including how the planning function of management is used. Planning allows organizations to develop how the

Assisted Suicide

1015 words - 5 pages Should physician-assisted suicide be legal? While I believe if one chooses to end his or own life through physician assistance for reasons that they chose, the choice should be up to the individual. Physician-assisted suicide should be at one's discretion. “Assisted Suicide, also called Voluntary Euthanasia, is currently a contentious issue in many countries. Because Euthanasia is legal in a few modern democracies: the Netherlands, Belgium

Tanglewood Case 1

797 words - 4 pages Tanglewood’s staffing strategy requires the organization to make key decisions about the acquisition, deployment, and retention of the organization’s workforce. In order to accomplish this, Tanglewood’s must make thirteen decisions regarding its staffing levels and its staffing quality. One of the first decisions that Tanglewood needs to choose is to acquire or develop talent. Tanglewood should try to develop their current talent because one

Nnnnn

1391 words - 6 pages Есе по въпроса: Кои от всички „действащи” лица могат да се разглеждат като морално отговорни и в какво именно? по казуса Форд „Пинто” Корпоративните злодеяния са нанесли повече вреди на обществото от всички улични престъпления взети заедно. Според данни на ФБР сумата от уличните престъпления възлиза на $3.8 млрд. годишно, а загубите от корпоративните измами между $100 млрд. и $400 млрд. годишно

The Penis

1052 words - 5 pages The short story ”The Penis” is written by Hanif Kureishi. The short story is about a penis, which has been separated from its owner Doug, who we hear from later on. At first though we hear about a guy called Alfie who was “a cutter – a hairdresser – and had to get to work”. He is having breakfast with his wife, when she asks him what he did last night, and if he had a good time last night? Alfie can not remember what he did last night, he then

Managed Care Paper

543 words - 3 pages Managed Care and Case Management Care Marvin Lloyd BSHS/402-Case Management 27 August 2012 Virgil Miller Managed Care are techniques employed to help reduce the cost for providing health benefits and a system for improving organizations quality of care

Media

439 words - 2 pages The life expectancy is lower; so people are not kept alive with drugs for decades in a virtual sleep state. There is less state education; so kids don't have it drilled into them that their only goal in life is to make money, at the cost of 'everything' else. The health care is less; so diseases, usually brought by Westerners, kill many more than they do in countries where drug companies can make a fortune from selling medicines that aren't

Similar Documents

Scie211 Phase 2 Lab Report

343 words - 2 pages Name: Date: Instructor’s Name: Assignment: SCIE211 Phase 2 Lab Report Title: Speciation Instructions: You will need to write a 1-page lab report using the scientific method to answer the following question: • What would happen if a species within a population were suddenly split into 2 groups by an earthquake that creates a physical barrier like a canyon? When your lab report is complete, post it in Submitted Assignment

Scie211 Phase 2 Lab Report

350 words - 2 pages Name: Date: Instructor’s Name: Assignment: SCIE211 Phase 2 Lab Report Title: Speciation Instructions: You will need to write a 1-page lab report using the scientific method to answer the following question: • What would happen if a species of lizards were suddenly split into 2 groups by a hurricane, resulting in isolation of a small group of individuals on an island far from the mainland? When your lab report is complete

Love Is God Essay

6636 words - 27 pages ) and groups involved in the fight against poverty and social exclusion in the Member States of the European Union. One of the main conclusions of the meeting was that social service users fell often professional mistreated them, especially if they have children. In those situations social workers “treat” them using their parental rights in relation with their children if they do not fulfil social workers’ speciation in relation to the way they

Mgt216 Essay

714 words - 3 pages The first ethical issue presented in the ethics game simulation was whether to warn consumers about the contaminated product and what information to provide consumers about the contaminant. The second ethical issue was whether to sell a product that does not meet U.S. safety requirements in a foreign market that has lower safety restrictions. G-BioSport was not required to meet prior approval from the Federal Drug Administration before they