What is a control group? Give an example.

Answers

Answer 1

Answer:

Example of a Negative Control Group:

Negative control groups are particularly common in science fair experiments, to teach students how to identify the independent variable. A simple example of a control group can be seen in an experiment in which the researcher tests whether or not a new fertilizer has an effect on plant growth. The negative control group would be the set of plants grown without the fertilizer, but under the exact same conditions as the experimental group. The only difference between the experimental group would be whether or not the fertilizer was used.

Example of a Positive Control Group:

A positive control demonstrates an experiment is capable of producing a positive result. For example, let's say you are examining bacterial susceptibility to a drug. You might use a positive control to make sure the growth medium is capable of supporting any bacteria. You could culture bacteria known to carry the drug resistance marker, so they should be capable of surviving on a drug-treated medium. If these bacteria grow, you have a positive control that shows other drug-resistance bacteria should be capable of surviving the test.


Related Questions

can you anwser this question? How has the government of the Roman Republic influenced the structure of the U.S. government?

Answers

Answer:

This type of government has elected officials that govern the country and are responsible to the voters who elect them. The Romans created a republic after overthrowing a king. Romans are also responsible for creating a legal code written down which protected the rights of all citizens.

Explanation:

They influenced how we where issue up our branches of government

Siddhartha was... PLEASE HELP!

Group of answer choices


the founder of Hinduism


a famous Aryan leader


a famous ruler of India who converted to Buddhism


the founder of Buddhism

Answers

Answer:

the founder of Buddhism

Explanation:

Siddhartha was the the founder of religional belief Buddhism.

Answer: the founder of Buddhism

Siddhartha was the founder of Buddhism. He thought Hindu practices were too hard for him to follow. He was a monk for most of his life.

Hope this helps!

Keeping a child safe is the primary responsibility of the parent.
A.
True
B.
False

Answers

Answer:

A

Explanation:

What kind of question is that lol

Answer:

Its true because they have to keep their children safe, but also false because they also have to keep up with jobs and bills and payments and all of that sTuFf

Explanation:

The Five Pillars (fasting, declaration of belief, pilgrimage, alms, and daily prayer) are the principle religious duties in ________.
A Christianity
B Hinduism
C Buddhism
D Islam

Answers

ISLAM ( D )

BECAUSE THESE ARE THE BASIC FIVE PILLARS OF ISLAM

which of the following statements are true about citizenship in ancient Rome?
A. most of those that became citizens were those that fought during the punic wars.
B.the emperor Augustus made everyone citizens in 63 C.E
C.julius ceaser prohibited citizenship to everyone who isn't a soldier
D.as soon as you paid your taxes you were granted citizenship.

Answers

Answer:

Explanation:

when you paid your taxes then you were considered a citizen

How did the white settlers transform Virginia intona profitable colony by 1700

Answers

Answer:

In order to thrive, the colony needed a staple crop, one that could be exported for profit and thus fuel Virginia's economy. Rolfe discovered such a crop in tobacco. Those who did survive helped to make a small number of elite white Virginians very wealthy.

Explanation:

Hope this helps!

Answer:

Planting Tobacco

Explanation:

To survive, the settlers need a staple crop that can be transported for food, clothing, and other useful things. Tobacco made Virginia a very rich state.

The first communities in China existed along the
A.Huang He
B.Beijing River
C.Ganges River
D. Shanghai River

Answers

i believe it will be answer A

Describe the New Kingdom under Thutmose III and during its later decline. :)

Answers

Answer:

Thutmose Period of rule: from 1479 BC until 1425 BC

was famous for being a brilliant leader, later known as Napoleon of Egypt Thutmose III was one of the greatest pharaohs in the history of ancient Egypt. In his 54-year reign, he defeated many of the country's enemies and expanded the boundaries of the Egyptian empire< It was not long before Thutmose the Third took power until many of the kings of the East declared their rebellion against the Egyptian state; he quickly confronted his army and confronted him with a surprise attack through a narrow mountain pass to defeat the enemy in a battle known as the Battle of Megiddo; And brought them under Egyptian control.

Thutmose III built castles and forts, trained soldiers on the best exercises, supplied them with powerful innovative weapons such as the newly developed darts and expanded use of vehicles in combat ,In the era of Thutmose the Third, he says, "There is no power in the land that can confront the Egyptian army, which received great military training and won the leadership of the king of Abarqee, Pharaoh of Great Egypt Thutmose III"

Architecture in his reignLike other great pharaohs of the modern era, Thutmose the Third had a rich architectural production. Ancient Egyptian writings recorded that he had built more than 50 temples throughout the country. He also put some additions to the Karnak Temple as the construction of new gates, High-rise obelisks.

Explanation:

Im good like eht.

Match the Democratic Principle with the quote from the Declaration of Independence.

Answers

Answer:

do you have a 3rd try??

Explanation:

1 { According to the diagram, what rock groups can form metamorphic rock?
2 { What is the process shown by number 1?

Answers

Answer: Heat and pressure

Explanation:

Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.

heat and pressure

heat and pressure can melt the magma and turn rocks into different rocks

Which is not necessary to include in an emergency call list. A. Poison Control B. Local police department C. Parents' location and number D. Best friend's cell number

Answers

Answer:

its D

Explanation:

your best friends number won't help I'm a serious emergency

Answer:

d

Explanation:

she may not even help you (:

have a great day

How are the layouts of many towns and cities today similar to those in ancient Rome?

Answers

Many Roman towns had shops like we do today. They had temples where they worshipped Roman gods just like we have churches today.

There are lots of ways the layout of many towns and cities of today are similar to those in ancient Rome such as streets follow the same design and layout. They are build in grid like structure.

What was the layout of Roman cities?

The Romans were known to built towns using the same style. There were hundred of town and cities built, throughout the Roman Empire. All the cities and towns had the same building structure at that time.

The whole empire was designed in the form of a grid structure, with the streets which were built at right angles to each other and they were parallel with one of the two main roads.

When they used to build new cities or towns, they typically used the same type of city plans. Today, the layout of the modern city is very much similar to the Roman towns.  

Learn more about layout of Roman cities here:-

https://brainly.com/question/24816416

#SPJ2

Which of the following is not one of the world’s five major religions?

Judaism
Buddhism
Islam
Sikhism

Answers

Answer:

The answer is Sikhism.

Explanation: Sikhism is not even near one of the five major religions.

PLEASE HELP, PLEASE! PLEASE HELP ME

Answers

Answer:

D

Explanation:

i’m pretty sure it’s D

The bar or bat mitzvah is a coming-of-age ceremony in ________.
A Judaism
B Islam
C Buddhism
D Hinduism

Answers

Answer:

judaism

Explanation:

A=Judaism is the correct answer

Mexican Federal Constitution of 1824
How many land grant contracts did the state of Texas grant to settlers?

Answers

Answer:

Explanation: in addition to large grants made directly to the contractors settlers were granted 640 each if heads of familles or 320  if they were single  hope this helped

Which best describes the difference between a market and a command economy?

a: In a market economy, the government has total control over economic decisions; in a command economy, the government has no control over economic decisions.

b: In a market economy, decisions are made according to customs and traditions; in a command economy, the government has no control over economic decisions.

c: In a market economy, the government has no control over economic decisions; in a command economy, economic decisions are made according to customs and traditions.

d: In a market economy, the government has no control over economic decisions; in a command economy, the government has ultimate control over economic decisions.

Answers

d). Is your answer

Explained: In a market economy, the government has no control over economic decisions; in a command economy , the government has ultimate controls over economic decisions

Answer: d: In a market economy, the government has no control over economic decisions; in a command economy, the government has ultimate control over economic decisions.

Explanation:

Explain the difference between the government in the South and the government in the North.
Will Give Brainlest

Answers

Answer:

If you are talking about the state governments in the north and south, the state governments in the south are mostly conservative and republican where the governments in the north are liberal and democratic. If we go back to the Civil War Era, the governments in the south were pro-slavery where the ones in the north were against slavery.

Explanation:

The excerpt above reflects the dissatisfaction of American colonists with the —

A. political debates that took place at the Albany Convention
B. interference of Great Britain in the slave trade
C. economic consequences of the Great Awakening
D. economic policies imposed by Great Britain following the French and Indian War

Answers

Answer:

Your answer is D) Economic policies imposed by great Britain following the French and Indian war.

Explanation:

Hope this helped if so SMASH that 5 star : )

The answer is c just took quiz

Which of the following is the Holiest Book of Islam? A The Talmud B The Hindu C The Gospel D The Qur'an

Answers

Answer:

D

Explanation:

Answer:

The answer is D The Qun'an

Explanation:

plz give brainlest

A goal is:
A.
Anything good that happens to you, whether or not you planned for it.
B.
Any dream you want to accomplish, whether it is written or just a thought.
C.
A desire so strong to achieve something that you are willing to work for it.
D.
All of the above

Answers

Answer:

C

Explanation:

You work for your goals so it would make sense

D is the answer my dude

This list of notes would most likely be used by a student writing a research paper tilted _____.

Answers

Answer:

D for sure

Explanation:

trade makes no sense at all  

and A-B dont make sense because non say nything ab them

What did the Inca believe gold and silver were?

Answers

Answer:

They believed that gold was the sweat of the sun and silver was the tears of the moon.

The Inca believed that the gold was the sweat of the sun and that Silver was the tears of the moon.

Where is the Inca Empire?

The Inca Empire was largest empire in pre-Columbian America also known as the Inka Empire.

In conclusion, the Inca believed that the gold was the sweat of the sun and that Silver was the tears of the moon.

Read more about Inca Empire

brainly.com/question/1036358

PLZZZZZZZZZZZZZZZZ HELP ME i begging YOUUUUU !!!!!!!!!!!!!!!!!!!!!!!!!!!
What countries sent the First Explorers?
Portugal
The Portuguese were the first successful explorers because of their guns and seamanship. With their large cannons, their fleet was able to defeat most ships and armies they came across. Beginning in 1520, Portuguese fleets probing south along the western coast of Africa. There, they discovered a new source of gold. For this reason, the southern coast of West Africa became known as the Gold Coast. The explorer Vasco da Gama sailed around the southern tip of Africa, called the Cape of Good Hope, and cut across the Indian Ocean to reach India. After people heard about de Gama’s profits, many more Portuguese sailed the same route to India, setting up posts in Africa along the way.
Spain
Educated Europeans knew the world was round, but they had no idea of how big it was. The Spanish thought that they could find new routes to India and China by sailing west across the Atlantic Ocean. Christopher Columbus persuaded the king and queen of Spain to pay for his voyage sailing west to reach Asia. With his three ships, Columbus reached the islands of Cuba and Hispaniola (which would later become Dominican Republic and Haiti). As he traveled to most islands in the Caribbean, Columbus thought he had reached Asia. This false belief is why the Europeans called the people they found “Indians” they thought they were in India.
Another important explorer for Spain was Ferdinand Magellan. Magellan succeeded in reaching Asia by sailing west across the Atlantic by going around the southern tip of South American and continuing west across the Pacific Ocean. Magellan reached the Philippines in Asia, where he was killed by local natives. However, one of his ships continued on to Spain, and Magellan is given credit as being the first to sail around the entire world.
The Spanish and Portuguese began competing for the territories they found in the “New World.” Eventually they would sign a treaty, agreeing which lands each country would be allowed to take over. The new lands were given the general name America, after the Italian explorer Amerigo Vespucci. After the success of Spain and Portugal in exploring the Americas, the Dutch, the English, and the French began sending expeditions to find new places to trade in the Americas.
The European explorations would change life not only for Europeans, but also for the native peoples of South America, North America, and Africans as well.

7. In the chart below, list the two European nations that sent the first explorers, which explorers they sent, and what lands they explored.Which is the EUROPEAN NATION ,EXPLORERS and LANDS EXPLORED

Answers

Answer:

Be a bit more specific, if it is to America, then Spain

Explanation:

Reason being christopher colombus

it is spain because christopher columbus was sent by them! hope this helps:)

Explain the difference between the culture in the South and the culture in the North.
WILL GIVE BRAINLY BRAINLEST

Answers

Answer:

Your answer:

The south's culture was based around native American cultures, for example their lifestyle.  In the south they grew things like tobacco, and cotton. They also had great dirt/soil, so they were able to build nice strong buildings. They believed in slavery, they didn't believe in education, and they believed in God.

The north's culture was about the opposite of the south's culture. In the north they were against slavery, they did believe in education and the most people who got education ended up having a career of business, medicine, or education. They wasn't really strict when it came down to religion they accepted different religions.

Hope this helped : )

This is from the internet you can copy the whole thing if you want : )

Overall, are these laws regarding family just?

Answers

Answer:

sureeee

Explanation:

yes they are regarding family just

How is the citizen's role in elections more limited in Saudi Arabia than in Israel?

Answers

Answer:

How is the citizen's role in elections more limited in Saudi Arabia than in Israel?

Explanation:

According to the Democracy Index 2016 study, Israel and Lebanon are the only democratic ... In 2015, Tunisia became the first Arab country classified as free since the ... such as Saudi Arabia, do not claim to be democracies; however, most of the ... Iran holds regular national elections by universal suffrage for all citizens

You show respect for another person by:
A.
Listening to the other person with an open mind
B.
Considering their point of view and feelings
C.
Maintaining your personal values
D.
All of the above

Answers

Answer:

D.all of the above

Explanation:

its important to respect a person in all of these ways

Explanation:

all of the above because so you can show respect to other people

The use of one natural resource is often as high or higher in poor, arid countries as it is in rich nations. Which of these is that resource?
A) oil
B) gold
C) water
D) fertile soil

Answers

C) water
hope this helps x
c , many people use water for survival and watering and hydrating plants and us

What is the analytical question asked by this Mini-Q? PLEASE HELPPPPP ME!

Answers

Answer:

How did the constitution protect against tyranny?

Explanation:

It helped protect tyranny by putting up (subtextual) blocks to help those who were affected by it

Answer:

good

Explanation

its good

Other Questions
Placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 ml. The weight of the sample is 76.6g. What is its density? (Round to the nearest hundredths) the mississippians were considered to be horticulturalist which means they were Hoy es lunes. ______es martes. 22 Carbohydrates perform many metabolic and structural jobs inside the living organisms. Anexample of a carbohydrate that provides structural support to cells is F chitin, a carbohydrate that strengthens the exoskeletons of insects and other arthropodsGstarch, a carbohydrate that is used by some plants as a way to store glucoseH cellulose, a carbohydrate that is used by plants to construct the cell wallJ glucose, a carbohydrate that is utilized by all life forms in the construction of nucleotides KIM AND HER MOM HAVE SOME ITEMS TO DONATE TOFAMILIES IN NEED FOR CHRISTMAS BASKETS. THEYHAVE 100 ROLLS AND 25 PUMPKIN PIES. THEY WANTEVERY BASKET TO BE EXACTLY THE SAME, AND THEYDON'T WANT ANY LEFTOVER FOOD. WHAT IS THELARGEST NUMBER OF BASKETS THAT THEY CAN MAKE? 1. The Sophists view of Rhetoric was based on a) The atoms.b) Skepticism.c) Relativism.d) Both b) and c).e) None of the above.2. Skepticism means that a) Only few persons can know truth.b) If we work hard we can know some truths.c) There are only few truths that we can know.d) All of the above.e) None of the above.3. Relativism means that a) All opinions are true. b) What is true is decided by each individual person.c) Some opinions are better than others.d) Both a) and b).e) None of the above.4. Things are by physis if a) They are good.b) We do not have a choice.c) We have a choice.d) They are beautiful.e) None of the above.5. Things are by nomos if a) They are beautiful.b) We do not have a choice.c) They are good.d) We have a choice.e) None of the above.6. For the Sophists justice, as defined by the laws of a society, was based on a) Physis.b) Mathematics.c) Nomos.d) Both a) and b).e) None of the above.i. 7. For the Sophists doing whatever is to our advantage is based on a) The common good.b) Physis.c) Nomos.d) Both a) and c).e) None of the above. 8. Both Socrates and the Sophists were concerned with a) Clear and persuasive communication.b) Winning arguments.c) Cooperating to get closer to the truth.d) Truth.e) None of the above.9. Socrates believed that truth a) Was relative to each person.b) Was dependent on culture.c) Was not related to happiness.d) All of the above. e) None of the above.10. Union between mortals and divinity was stressed by a) Democritus.b) Traditional Greek Religion.c) Mystery Religions.d) All of the above.e) None of the above.11. A source for our knowledge of Socrates is a) His autobiography.b) The Hindu Vedas.c) Homer.d) All of the above.e) None of the above.12. The answer of the Oracle created a dilemma for Socrates between his a) Epistemology and his aesthetics.b) Reason and his religious beliefs.c) His mission and the teachings of the Sophists.d) All of the above.e) None of the above.13. Both Socrates and the Sophists were concerned with a) Success in life.b) Following the law only if it is to ones advantage.c) Justice based on nomos.d) Succeeding in politics.e) None of the above.14. For Socrates human excellence (arte) consists in a) Political success.b) Applying a certain kind of knowledge to how we live.c) Acquiring honor.d) All of the above.e) Both a) and c).15. For Homer the body was a) What made us human.b) Much more important than psyche (self).c) A breath or vapor.d) All of the abovee) Both a) and b).16. For Socrates a) The Oracles answer was useless.b) Teaching was giving good and lasting ideas to his students.c) Our must important business was to care for our body.d) All of the above.e) None of the above.17. For Socrates wisdom consisted in a) Having a certain kind of knowledge.b) Applying a certain kind of knowledge to enhance our whole life.c) Striving to reach the goal of living the best life for a human being.d) All of the above.e) None of the above.18. By saying that the unexamined life is not worth living Socrates meant that a) Life was too short to continually second-guess our decisions.b) Life without constantly testing our courage is a very inferior life.c) A life without pain is a worthless life.d) All of the above.e) None of the above.19. A requirement for using the Socratic Method successfully is to have a) A sense of humor.b) High self esteem.c) A strong desire to win an argument.d) A healthy body.e) None of the above.20. Socrates told his jury that he was worried about them because a) They might be found guilty later on and condemned to death.b) They were harming themselves more than harming him.c) The gods of Athens will surely punish them.d) Both a) and c).e) None of the above.TYPE EACH QUESTION NUMBER AND AN EXPLANATION OF THE REASONS FOR EACH OF YOUR 46 QUESTIONS. What are the eight areas of wellness and how can they be incorporated into one's daily life help please!!!!! i don't understand, any help would be great!! thank you!! Fish are sensitive to many environmental variables: dissolved oxygen, light, temperature, pH, clarity of water, food supply, presence of predators, etc. Fish will be attracted to different locations in a lake, based on its mix of variables. Imagine you want to conduct an experiment to understand how just one of these variables differs in a local lake, depending on its depth. This lake reaches a depth of 17 meters. For this activity: Pick a variable that might change as you go deeper in the lake on a given day. Do a little research on that variable to determine how you might measure it in a lake. Use the template below to outline an experiment to investigate this variable in the lake by depth. For each part, simply answer the question in parentheses to create your outline. Type your response to each field in the space below that field: Title: (Enter a brief, descriptive title. Hint: Sometimes its best to do this last.) Purpose: (Why are you doing this experiment?) Hypothesis: (What do you predict from this experiment and why?) Procedure/Method: (How will you specifically carry out your experiment to test your prediction?) Observations: (What specifically would you look for and record?) Data analysis: (With this kind of data, what would be the best way to present it?) Conclusion: [No need to enter anything here for now.] References: (List any references you used to design the experiment. Note that for a full experiment write-up youd also list any references you used while carrying out the experiment or in analyzing your results.) factor this expression fully [tex] {x}^{2}(x - 1) - 9x(x - 1) + 8(x - 1)[/tex] I NEED ANSWER NOW .Which detail from "The Workers of Ellis Island" shows that Ellis Island was a processing center sensitive to the needs of immigrants?Given the enormous amount of paperwork that needed to be done at Ellis Island, it comes as no surprise that dozens and dozens of clerks and stenographers were employed there.The role of the doctors on Ellis Island was confined to the medical examination, diagnosis, and treatment of the immigrants.Besides conducting the line inspection, doctors played no role in deciding the fitness of a person to enter the country. Throughout the years, numerous organizations offered aid to immigrants at Ellis Island. Many of these immigrant aid societies maintained permanent representatives on Ellis Island. 0.3 (2x+5x) = 4.2How do you solve Decimal Equations? i need help again Which of the following forces weathers objects by expanding and changing shape?Moving waterWindPlantsIce What is the circumference of the circle?r=22in d=44inA. 222in B. 2.5in C. 125.23inD. 138.23in 1) a+b=b+a2) (a+b)+c=a+(b+c)3) n+0=n4) c(a+b)=ca+cb5)n-0=n please help and answer all i will mark brainliest ! simplify negative 8 over 3 divided by negative 2 over 6. . (5 point Select the defined terms in Geometry 1-plane2-line segment3-point4-line5-ray Solve the equation for x. 7- x= 12 Consider the function f(x) = 9x^2- 3x + 3Determine the output produced by the input value x = 3.Output: F(3) = The elevation of the harbor is ____ than the elevation at sea level. 1. Less 2. greater