A ____________ is a set of short dna fragments that will be subjected to massively parallel sequencing in order to produce ____________, which are the dna sequences of those fragments.

Answers

Answer 1

The term "genomic library" refers to a collection of brief DNA fragments that will be submitted to massively parallel sequencing to yield sequence reads, also known as "next generation sequencing," which are DNA sequences or base pairs of those DNA fragments.

A genomic library includes every sequence found in an organism's genome (apart from any sequences, such as telomeres that cannot be readily cloned). It is a group of cloned, restriction-enzyme-digested DNA fragments that include copies of all the DNA sequences found in a genome. An organism's full genome is represented as a collection of DNA fragments put into a vector molecule.

A genomic library could be created using a plasmid vector in the case of organisms with tiny genomic sizes, such E. coli. Only 5000 clones in this scenario (with an average DNA insert size of 5 kb) would provide a higher than 99% chance of successfully replicating the whole genome (4.6 x106 bp).

Lambda phage, BAC, or YAC vectors are used to build the majority of libraries from organisms with bigger genomic library. These can accept DNA inserts that are about 23,45,350 and 1000 kb in size, respectively. Because of this, fewer recombinants are required than with plasmids to span the entire genome.

Learn more about genomic library here

https://brainly.com/question/14006268

#SPJ4


Related Questions

In the roosevelt corollary to the monroe doctrine, the president informed several european nations who threatened to invade the dominican republic that:_________

Answers

In the Roosevelt corollary to the Monroe doctrine, the president informed several European nations who threatened to invade the Dominican republic that announced that in some circumstances the US had the right to meddle in Latin American affairs.

In order to collect customs taxes until European debts were paid, the US would send gunboats to a Latin American nation that was behind on its payments. US sailors and marines would control the key ports during this time.

The Monroe Doctrine was founded on four tenets. One of them was that any future colonization or domination of the Americas by a European force was no longer to be entertained.

To learn more about Monroe Doctrine, click

https://brainly.com/question/290388

#SPJ4

This statue from china was created about 1500. what do the buddha's hand gestures symbolize? meditation wisdom charity and compassion teachings of buddha

Answers

This statue from china was created in about 1500. Buddha's hand gestures symbolize charity and compassion.

According to tradition, Buddha prefers the "fingers" of the fruit to be in a posture that very closely looks like a closed hand than an open one because he believes that a closed hand represents the act of prayer. In China, the fruit in the Buddha's hand is a symbol of happiness, longevity, and wealth.

The right hand of the sitting Buddha of Protection is extended and outstretched. The hands are making a shield-like gesture. In another sense, the position can represent overcoming fear. Whether the Protection Buddha is seated or standing, the left hand is usually either extended or put on the lap.

He is seated on a lotus flower, which represents purity, and is holding another one in his hands.

To learn more about Buddha refer to:

https://brainly.com/question/11283932

#SPJ4

What are the three requirements that the international fire code imposes on contractors related to acceptance tests?

Answers

The three requirements that the international fire code imposes on contractors related to acceptance tests

coating made of mortar.

flammable coating

coating for sublimation.

What does a fire prevention system acceptance test entail?

"Acceptance testing functionally evaluates system components to ensure that a specific system was installed and is operational in compliance with the relevant standards and the authority having jurisdiction (AHJ)," according to the APA.

Which three things make up a commercial fire protection system's core elements?

The following are the essential elements: regulating fire alarms. Control panel for the ARCS (Auxiliary Radio Communication System).

Which organization is a reliable resource for information on testing programs for fire protection systems?

The Certified Fire Protection Specialist, Certified Fire Inspector, and Certified Fire Plans Examiner professional certification programs are all administered by NFPA. The NFPA Conference & Expo, held annually, promotes communication among Association members.

To Know more about sublimation

https://brainly.com/question/28626755

#SPJ1

How would you make a multimedia cookbook for a family of varying cooking skills and abilities?

Answers

Answer:

Give each person a chapter in the cook book

Explanation:

each chapter would be different and on different levels. like chapter Emily would be more easy level breakfast foods

_______________ concerns how disease or injury affects physiological processes or dysfunction.

Answers

Pathophysiology concerns how disease or injury affects physiological processes or dysfunction.

Pathophysiology is the combined form of pathology with physiology that studies the dysfunctional pathological responses in an organism associated with an injury or disease. Pathology is a medical study that tells about the typical conditions of a diseased state of an organism, while physiology is a medical study that describes various anatomical processes occurring within an organism.

A student who studies pathophysiology gains knowledge about human body organs and their functions. It also tells about how organ systems are interrelated to maintain homeostasis.

Thus, after being acknowledged the organ systems, one can distinguish the changes occurring in the body after a disease or injury.

To know more about the effect of diseases, refer to the following link:

https://brainly.com/question/934133

#SPJ4

The reason that people do not become overwhelmed by their environments is that consciousness allows people the awareness to __________. a. learn to observe all stimuli at once b. rewire the brain to have more capacity c. selectively focus on certain stimuli d. remember the feeling of calmness please select the best answer from the choices provided a b c d

Answers

The reason that people do not become overwhelmed by their environments is that consciousness allows people the awareness to selectively focus on certain stimuli.

Because consciousness enables individuals to consciously focus their awareness on particular stimuli, humans do not become overwhelmed by their surroundings.

Anything that prompts action in any organism is known as a stimulus or stimulus. An internal or external trigger is possible. We are sensitive to outside stimuli thanks to our sensory organs and receptors.

The order in which stimuli are sent to our brain can be controlled. All stimuli do not necessarily have to be felt. There are a number of cognitive and emotional restrictions on environmental awareness. Depending on its surroundings, the brain can concentrate on certain stimuli.

To learn more about receptors refer to:

https://brainly.com/question/11985070

#SPJ4

_______ reality allows physical and virtual elements to interact with one another in an environment; it is not a fully immersive experience because it maintains connections to the real world.

Answers

Augmented reality (AR) allows individuals to see physical and virtual contents interacting with one another in an environment that seems to be real but it does not provide a fully immersive experience because it sustains connections to the real world.

Augmented reality is a technology that allows virtual elements to be displayed onto the physical environment. In augmented reality, a simulated environment is experienced that allows one to remain in the real world and experience computer-generated content.

As augmented reality is the integration of the digital environment with the physical world, it does not completely shut down the real world as in the case of virtual reality. Go-ogle Glass is an example of augmented reality where digital content is shown on a mini screen ahead of a user’s eye.

You can learn more about augmented reality at

https://brainly.com/question/9054673

#SPJ4

On a very, very cold day at the north pole, santa notices that his dual-reading thermometer registers the exact same reading on both the celsius and fahrenheit scales! the temperature is:_________

Answers

Santa sees that his dual-reading thermometer displays the exact same value in both Celsius and Fahrenheit on an extremely frigid day at the north pole. It is -40 degrees outside.

At what temp does your body shut down?Temperature is a unit used to represent hotness or coolness on any of a number of scales, including Fahrenheit and Celsius. According to temperature, heat energy will naturally move from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature). There are two significant temperature scales: Celsius and Fahrenheit. While Celsius is utilized all across the world, the Fahrenheit scale is mostly employed in the United States. The zero points on the two systems differ, and the Celsius degree is greater than the Fahrenheit degree. The internal organs begin to shut down when the body temperature exceeds 104 degrees.

Hence, Degrees F = 1.8 × degrees C + 32

If degrees F = degrees C = x, then:

x = 1.8x +32

Subtract x from both sides:

0 = 0.8x + 32

Subtract 32 from both sides:

-32 = 0.8x

Divide  both sides by 0.8:

-40 = x

To learn more about Fahrenheit readings, refer to:

https://brainly.com/question/26141817

#SPJ4

Court records of juvenile offenders are often hidden from the public or expunged to avoid stigmatizing relatively young individuals for life. this concept relates to what is known as ______.

Answers

Court records of juvenile offenders are often hidden from the public or expunged to avoid stigmatizing relatively young individuals for life. this concept relates to what is known as discreditable stigma.

People with a stigma that is primarily visible, such as one related to race or ethnicity, gender, or physical impairment, are considered to be dismissed. The discreditable, in contrast, are people who are stigmatized for reasons that are primarily concealable, such as mental illness, HIV infection, or sexual minority status.

People can see and find it challenging to conceal a stigma that has been discarded. A disabled person, depending on where they are placed, is an example of a discredited stigma. Other examples include leprosy, social disabilities like stigma, and race and ethnicity.

To know more about discreditable stigma refer to:  https://brainly.com/question/6354442

#SPJ4

Identify ways in which team size and diversity of membership affect team performance

Answers

The following are some ways that team size and membership diversity effect performance:

Large teams suffer from a lack of coordination, a loss of motivation, and a reduction in performance. Smaller teams are more efficient, but they should be big enough to have a variety of talents to finish tasks well.

A larger team experiences more absenteeism and turnover.

Teams with a variety of members do better than those with only one type.

Diverse teams are better able to produce creative solutions than monolithic groups.

Teams perform better when there is gender and talent diversity.

membership diversity effect, team member satisfaction, or an organization's ability to innovate can all be affected by diversity. The Input-Process-Output Model identifies team diversity as an input factor that influences both the processes and the team outputs of collaborative work.

In general, variety in groups will typically result in more positive than bad results under the correct conditions. Membership diversity effect can lead to some issues in groups, some of which, if uncontrolled, can destroy the entire group dynamic.

Learn more about membership diversity effect here

https://brainly.com/question/13102825

#SPJ4

True or false? inserting into an unsorted list and deleting from an unsorted list are the same time complexity.

Answers

True: Inserting into an unsorted list and deleting from an unsorted list are the same time complexity.

What is the time complexity of inserting and deleting?If you don't know the location, then you need to traverse the list to the location of deletion/insertion, which takes O(n) time.  The deletion cost is O(log n) for the minimum or maximum, O(n) for an arbitrary element. There is some confusion in deletion in array.Finding the element you want to delete takes O(n) time. Then, to delete it, move all elements to the right of it one space to the left. Because this is also O(n), the overall complexity is linear.Inserting an element in the middle of an array has a computational complexity of O(N), where N is the number of elements in the array. The elements in the array must all be shifted up one index after the insertion, or all the elements must be copied to a new array big enough to hold the inserted element.

To learn more about complexity refer to

https://brainly.com/question/1870140

#SPJ4

You are collecting the same data and receive very different results from your participants. what should you do?

Answers

We can actually deduce here that when one is collecting the same data and receiving very different results from the participants, what the person should do is to reevaluate the data-collection methods.

What is data collection?

Data collection or collection of data is actually known to be a process of gathering, collecting and analyzing data that has been collected from various sources. This is done in order to find answers to research questions and trends that go on.

We see here that there is a possibility of collecting the same data and receive very different results from participants and so as a result of that the data-collector should reevaluate the data-collection methods.

Learn more about data collection on https://brainly.com/question/25836560

#SPJ1

Observation, surveys, interviews, standardized testing, physiological measures, and case studies are all methods of:_______

Answers

Observation, surveys, interviews, standardized testing, physiological measures, and case studies are all methods of data collection.

"Data collection is the procedure of collecting and measuring information on aimed variables in an pre developed system, which allows one to answer applicable questions and study the results. It is a research factor in all fields of study, including physical science, social sciences, humanities,  business, etc."

"It is a very crucial part of a research work because it allows the surveyor to make decisions related to the information gathered and also to understand how considerate the data is, that will guide in moving forward the research work".

To learn more about Data collection,

https://brainly.com/question/21605027

#SPJ4

By defaul, icmp traffic (ping) is allowed through the ufw firewall. what file needs to be modified to deny this ping activity?

Answers

By default, ICMP traffic (ping) is allowed through the ufw firewall. The file that needs to be modified to deny this ping activity is /etc/ufw/before.rules.

Ping operates using Internet Control Message Protocol (ICMP) packets. Pinging involves sending an ICMP echo request to the target host and waiting for an ICMP echo reply.

To send an ICMP echo request packet to the IP address you specify: Issue the ping command in Privileged Exec mode.

The Internet Control Message Protocol (ICMP) is used by devices within a network to communicate data transmission problems. In this ICMP definition, one of the primary ways in which ICMP is used is to determine if data is reaching its destination and at the right time.

To learn more about ICMP here

brainly.com/question/6265069

#SPJ4

Which is the most likely reason that some countries, such as norway and switzerland, choose not to be members of the european union?

Answers

They don't want to be bound by the terms of the treaty is main reason that some​ countries, such as Norway and​ Switzerland, choose not to be members of the European Union​ (EU).

More about European Union​ (EU):

27 European nations make up the European Union (EU), an international organisation that sets basic economic, cultural, and security policies. The EU began a major growth into central and eastern Europe in the beginning twenty-first century after being limited to western Europe at first.

The European Coal and Steel Community, which had just six members when it was established in 1950 and included Belgium, France, Germany, Italy, Luxembourg, and the Netherlands, is where the European Union EU had its start. Under the terms of the Rome Treaty, it was renamed the European Community in 1957 after becoming the European Economic Community (EC).

Learn more about European Union (EU) here:

https://brainly.com/question/13433737

#SPJ4

Why is suction filtration used in this experiment versus gravity filtration? how can suction filtration assist with determining the percent composition of these two compounds in an unknown?

Answers

Suction filtration is preferred when solids are retained by gravity filtration. It is much less efficient at removing residual liquid from the solids of the filter paper. Vacuum filtration helps to determine the percentage composition of these two compounds in unknown quantities. Suction filtration (also known as vacuum filtration) is a technique used to separate liquids from solids. In this method, the aspirator draws air contained in a flask with a Buchner funnel with a filter.

Gravity: The invisible force that attracts objects to each other. Earth's gravity is what holds you to the ground and makes objects fall. Animation of gravity in action. Albert Einstein described gravity as a curve in space surrounding an object such as a star or planet.

Gravity, or gravity, is the force of attraction between two objects in space. The force of attraction depends on the mass of the object and the square of the distance between it. It is the weakest force known in nature. Einstein suggested that the shape of space-time is what gives rise to the force we perceive as gravity. Concentrations of mass (or energy), such as the Earth or the Sun, warp the surrounding space just as rocks bend the flow of a river.

Learn more about Gravity here:

https://brainly.com/question/557206

#SPJ4

Memorization through repeating information over and over may result in poor retrieval because ____.

Answers

Memorization through repeating information over and over may result in poor retrieval because no association are created by repeating the information.

What is Information?

Information is a general term for everything with the capacity to inform. It is most fundamentally concerned with the interpretation of what may be felt. Any naturally occurring process that is not entirely random, as well as any discernible pattern in any media, can be considered to communicate some level of information. Other occurrences and artifacts, such as analog signals, poetry, photographs, tunes or other audio, and currents, communicate information in a more continuous manner than digital signals and other data do. Information is the meaning that may be inferred from a representation through interpretation, not knowledge itself.

Learn more about Information here:

https://brainly.com/question/23264557

#SPJ4

What do sociologists call the social honor or prestige that society accords to a group of people?

Answers

sociologists name social popularity/status to the social honor or prestige that society accords to a team of people.

social status, additionally known as status, the relative rank that an man or woman holds, with attendant rights, duties, and lifestyle, in a social hierarchy primarily based upon honour or prestige.

What is status used for?

status Add to listing Share. If anyone wishes to recognize the popularity of something, they favor to understand what situation it is in, where it is, or how tons growth it's made. You've possibly checked the status of your flight to see if it's on time or delayed.

Learn more about social status here:

https://brainly.com/question/1288622#SPJ4

What is the best leadership style
Automatic
Democratic
Laissez-faire

Answers

The best leadership is B. Democratic leadership.

What is a leadership style?

A leader's distinctive characteristics when directing, inspiring, directing, and managing groups of people are referred to as their leadership style. Outstanding leaders may stoke social and political movements. They can also inspire others to work hard, be inventive, and produce

One of the most well-liked leadership philosophies is democratic leadership, which encourages employees to feel ownership over their work and solicits advice from the entire team. It should be noted that Democratic leadership ensures that everyone participates in achieving the goals.

Therefore, the best leadership is Democratic leadership.

Learn more about leadership on:

https://brainly.com/question/12522775

#SPJ1

Disciplinas del bádminton

Answers

Answer:

Individual masculino, individual femenino, dobles masculino, dobles femenino y dobles mixto.

                                            OR

Men's singles, Women's singles, Men's doubles, Women's doubles and Mixed doubles.

The nurse and client are developing a transcultural nursing care plan related to heart disease. the nurse will include in the plan:_________

Answers

Answer:

The nurse recognizes that this client is at increased risk for what conditions due to ethnicity or culture? Select all that apply. Cardiovascular disease

Explanation:

As part of a lab practical, you need to attach labels about chemical models. for the bond between amino acids, you would add a label describing that it is:________

Answers

As part of a lab practical, you need to attach labels about chemical models. for the bond between amino acids, you would add a label describing that it is: peptide bond.

Each amino acid is joined to another amino acid via a covalent bond, sometimes referred to as a peptide bond. To create polypeptide chains, amino acids are joined via peptide bonds.

A protein is made up of a lengthy chain of amino acids that are connected by peptide bonds. A water molecule is removed during a biological process that links the carboxyl group of one amino acid to the amino group of a nearby amino acid to generate peptide bonds.

To learn more about amino acid, refer

https://brainly.com/question/11843803

#SPJ4

A ______________ error is an error not sufficient to warrant the appellate court's reversing the decision.

Answers

A trial court docket error is an error now not ample to warrant the appellate court's reversing the decision.

An “error of law” generally capacity that the decide in your case utilized the incorrect rule or “legal standard” to the data of your case. This can show up if a trial court did not comply with either the statute or case law in your country that is supposed to observe in your case's circumstances.

What does error to the court docket mean?

Legal errors

A prison error occurs if the Judge applies the incorrect law or criminal theory to your case. Legal mistakes are a whole lot more difficult to show than clerical errors. Legal errors include: The Judge mistakenly applies the incorrect law in identifying your case

Learn more about trial court here:

https://brainly.com/question/11610196##SPJ4

What is the difference between a subculture streak from pure culture and a subculture streak from a mixed culture?

Answers

A culture is a group of microorganisms that has been cultivated in a lab. A mixed culture comprises two or more different types of bacteria while a pure culture only contains one type. While a mixed culture comprises a variety of microorganisms, a pure culture only contains one organism.

In order to adequately streak a plate for isolation, the organism(s) must be dispersed via the inoculating loop until single colonies appear. Each colony is made up of a collection of cells that develop from a single bacterial cell through cell division. Each mixed separated colony thus represents a pure bacterial culture.

To learn more about culture, click here.

https://brainly.com/question/3181478

#SPJ4

can someone in college or 11, 12 answer this please i need this done by today please help!!!

Answers

A nation's government is known as its national government. The fundamental duties of a national government include exercising leadership, upholding law and order, rendering public services, and ensuring national security, economic security, and economic assistance.

What is the function of a national government?

The U.S. Constitution grants Congress, the President, and the Federal courts, respectively, the authority to act as the legislative, executive, and judicial departments of the federal government.

Each area of government has unique duties that are peculiar to it. National defense, the criminal justice system (safety and security, courts), higher education, water, and energy (electricity) resources, and administrative functions are some examples of these for the national government (home affairs, collection of national taxes). Governments maintain competition, provide public goods and services, redistribute income, account for externalities, and stabilize the economy in addition to providing the legal and social framework.

In conclusion, the duties of a government include exercising leadership, upholding law and order, rendering public services, ensuring national security, etc.

Learn more about government on:

https://brainly.com/question/1078669

#SPJ1

Given the equilibrium system at 25 degrees c, what change will shift the equilibrium to the right?

Answers

At equilibrium, any chemical process, The equilibrium moves to the right, toward products, as a result of adding reactant(s) or taking away product(s).

There is no longer a propensity for the reactant and product concentrations to alter over time, and there has been no appreciable change in the system's characteristics. Changing the reactant or product of a chemical reaction after it achieves equilibrium is one strategy. As more reactant is added, the equilibrium changes, increasing the amount of product created. More products are added to reduce the tension, which shifts the equilibrium to reactants.

According to one of the principles, if you add additional products, the equilibrium will shift to the left, resulting in the production of more reactants. Equilibrium can also be shifted to the left by taking reactants out of the equation.

To know more about equilibrium refer to: https://brainly.com/question/12381710

#SPJ4

Global firms used advanced _______ to target markets, develop social media, track products in the supply chain, and enable robots and drones to perform tasks that provide customer service.

Answers

Global firms used advanced analytics to target markets, develop social media, track products in the supply chain, and enable robots and drones to perform tasks that provide customer service.

Advanced analytics is the independent or quasi-analysis of data or content using complex tools and methodologies, often above and beyond those of conventional business intelligence (BI), to gain a deeper understanding, predict the future, or product suggestions. Fundamentally, advanced analytics differs from classic descriptive analytics, also known as business intelligence, because it uses automation and artificial intelligence (AI) to handle far more complicated information and generate much more insightful and accurate forecasts. With the aid of advanced analytics, businesses may innovate and streamline their processes to acquire a competitive advantage. Advanced analytics helps businesses make better decisions and keep up with highly competitive, rapidly evolving markets by improving customer analysis, predictive analytics, and statistical modelling.

Learn more about advanced analytics here:

https://brainly.com/question/28080527

#SPJ4

You must have the ____ directory mounted on an available disk partition for any linux installation to be successful

Answers

You must have the boot directory mounted on an available disk partition for any Linux installation to be successful.

What is booting?

In computers, booting is the process of turning on a computer, whether it be by software or hardware commands like a button.

A process must load software into memory for a computer's central processing unit (CPU) to be able to run it after the machine is turned on.

Methods for Booting

The Start-Up It is the initial stage that entails turning on the power.

Power On Self Test in the BIOS. It is a preliminary test run by the BIOS.

OS loading. The operating system is loaded into the main memory in this step. ...

System Utilities for loading.

To learn more about booting, refer

https://brainly.com/question/27773523

#SPJ4

What is the importance of the international employment?​

Answers

Answer: Foreign employment reduces the unemployment problem of a country. It may help to develop international relations with other countries because the country has to do labor contract with other countries and embassies has to be established there.

Explanation:

Which European country settled most of North America during the 16th and 17th century

Answers

The people from the British in European continent settled most of North America during the 16th and 17th century.

What was the reason for the immigration?

The North American was mainly settled from about 1717 to 1775 by Presbyterian farmers from North England border lands, Scotland, and Ulster, fleeing hard times and religious persecution. Hence, about an estimate of 250,000 and 400,000 Scots-Irish migrated to America in the 18th century.

Therefore, the people from the British in European continent settled most of North America during the 16th and 17th century.

Read more about 1700s immigration

brainly.com/question/11461340

#SPJ1

Other Questions
A plots falling action includes events that Please help!!!!!!!!!!!!!!!!!!!!!!!In The Tell Tale Heart Poe uses pacing within his story.Read the quote below:His room was as black as pitch with the thick darkness (for the shutters were close fastened, through fear of robbers), and so I knew that he could not see the opening of the door, and I kept pushing it on steadily, steadily.ANSWER BOTH QUESTIONS.How is Poe using pacing in the quote provided?What impact does the pacing have on the story? A studio engineer charges a flat fee of 450 for equipment rental and 42 an hour for recording and mixing time. Write the equation that shows the cost to hire the studio engineer as a function of time. How much would it cost to hire the studio engineer for 17 hours? Which of the Middle Colonies did William Penn found in North America? What of the following of density is true. a density is measured in grams. density is mass per unit volume. density is measured is millimeters density is a chemical property the measure of a supplement of an angle exceeds 10 times the measure of its complement by 9. Find the measure of the angle Which lines are parallel to the graph of 4x y = 6? Check all that apply.x 4y = 12y 2 = 4(x + 1)y + 1 = 4(x 2)y = 4x + 11y = x 38x 2y = 6 (b) Identify and explain ONE perspective the colonists had about colonial involvement in the war. ____________ occurs when a mutation causes a change in the h and n spikes on the influenza virus. According to the basic dupont equation, a firm's roa is the product of what other two ratios? What is the verb in the following sentence?This, we decided, would be our secret hiding place for sweets and other small treasures such as conkers and monkey-nuts and birds eggs.A) would beB) wouldC) be A cup of coffee contains 87.2 mg of caffeine. how many grams is this? find L in the coneplease hurry When two species interact within a habitat, competitive exclusion can be observed if? The measure of one angle is 3 degrees more than 1/2 the measure of its supplement. Identify and solve an algebraic equation. _____ is credited with proposing the first rational explanation of why people get sick. Please help! Due in 5 mins! Experienced drivers are those drivers who have limited or no driving experience and possess basic knowledge as to their familiarity with, andoperation of, a motor vehicle.True or false In this problem, you will investigate the location of the points of concurrency for any equilateral triangle.a. Concrete Construct three different equilateral triangles on tracing paper and cut them out. Fold each triangle to locate the circumcenter, incenter, centroid, and orthocenter. What is a collaborative website that allows users to add, remove, and change content?