What is the purpose of using control groups in an experiment

Answers

Answer 1
typically you use experimental and control groups in an experiment. a control group is like the default, and the experimental is the one you actually experiment with.

for example if i run an experiment on the effects of food dye on a leaf stem, i’ll have my control group (the ones without food dye) to compare to the experimental group (the ones with food dye)

the control group is a way for scientists to see how an experiment truly affected or altered the subject


Related Questions

4. Compare the two examples of changes in beetle populations. Which of the two scenarios is an example of evolution? Defend your answer with an explanation.

Answers

Answer:

The second scenario, "Beetles of a different color", is an example of evolution.

Explanation:

Since evolution is defined as a change in gene frequency overtime, over generations, it is in the second example that we see such a phenomenon taking place. Brown beetles have become more common as opposed to the green beetle population that were the ancestors in this case.

Hope that answers the question, have a great day!

what trait is found in early embyros of both birds and humans

Answers

Answer: tail I'm not sure

Answer:

The answer is tail

Explanation:

I hope it helps you.

Which statement describes the offspring of the F1 generation when crossing a pea plant that is true breeding for green seeds with a pea plant that is true breeding for yellow seeds?

Answers

Answer:

The question lacks options, the options are:

A. The green trait is the dominant trait.

B. The offspring will inherit one gene from each parent.

C. The offspring will have both green and yellow seeds.

D. Each offspring will have a unique set of alleles.

The answer is optionB

Explanation:

This question describes a monohybrid cross i.e. involving a single gene coding for seed colour in pea plant. One allele codes for green seeds and the other for yellow seeds.

Based on the question, a plant that has the same alleles for yellow seeds is crossed with another plant that has same alleles for green seeds. The offsprings produced will have two different alleles i.e. heterozygous, contributed by each parent.

Hence, the offsprings will inherit one form of the gene from each parent.

Answer:

THE ANSWER IS B!!!

Explanation:

I usually dont try on answers but I guess now................................................................ Nothing has changed (:

Question 8 of 30
1 Point
Which of the following elements is a key ingredient in both proteins and
nucleic acids?
A. Nitrogen
B. Sulfur
C. Phosphorus
D. Helium
SUBNE

Answers

Answer is A . Nitrogen i think because it express of genetic information

Answer:

nitrogen

Explanation:

What happens in the stomach?

Answers

Answer The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach. The stomach muscles contract periodically, churning food to enhance digestion. The pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

Explanation:

Answer:

Large proteins are broken into smaller proteins.

Explanation:

stan blackpink!

start this thing that red pandas and raccoons are more a recent common ancestor that red pandas and giant pandas do if true what would you expect to be true about genetic sequence and in this organism​

Answers

Answer:

D

Explanation:

im going to guess its a cause think of it this way its like family in a way if raccoons and red pandas are a more common ancestor than they might have been family along the lines of history somewhere if its not a than d i hop this helps and id pick d it sounds more frequent

5 ways that overfishing in the ocean is a problem are identified

Answers

Overfishing is catching too many fish at once, so the breeding population becomes too depleted to recover. Overfishing often goes hand in hand with wasteful types of commercial fishing that haul in massive amounts of unwanted fish or other animals, which are then discarded. Overfishing endangers ocean ecosystems. Secondly, unregulated fishing practices that result in grave harm include by-catch (as explained in the previous point) and Trawling. Trawling involves scraping along the bottom of the sea to gather fish. This practice is one of the major causes of destruction to marine habitats. Third, overfishing has led to a decrease in the population of productive fish, resulting in lesser stocking of the fish. Forth, bycatch leads to the capturing of marine animals that are not used or required. The animals may include protected or endangered species or species that are of little or no economic value. If caught, they are normally destroyed and discarded either in the water or ashore. Lastly, fish farming requires feed for reared fish. For example, you will need between four and eleven pounds of prey fish to raise just one pound of farmed salmon. With the rapid expansion of the aquaculture industry, prey fish population is reducing at alarming and untenable rates. According to some researchers, if this trend continues, fish farming will have outstripped the supply of fishmeal by 2020.

Match each kind of drug to a relationship it has with society and culture

Answers

1. Cigarettes
2. Beer
3. Antacids
4. Cocaine

Beer: Legal and regulated drug.

Cocaine: Illegal and highly addictive drug.

Cigarettes: Legal but heavily regulated drug.

Antacids: Over-the-counter drug.

Beer is a legal and regulated drug. It is produced and sold by commercial companies, and it is heavily advertised. Beer can lead to alcoholism and cause injuries through DUI accidents. Cocaine is an illegal and highly addictive drug. It is produced and sold by criminal organizations, and it is not advertised. Cocaine can lead to addiction, and possession is a crime punishable by law.

Cigarettes are legal but heavily regulated drugs. They are produced and sold by commercial companies, but they are subject to strict regulations about where they can be used. Cigarettes can lead to lung cancer and other health problems. Antacids are over-the-counter drugs. They are sold in pharmacies and grocery stores, and they are not regulated by the government. Antacids are used to treat heartburn and other acid-related problems.

To know more about the Society, here

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How did the formation of the ozone layer contribute to the existence of life on Earth?
O It blocked the Sun's harmful UV rays.
O It caused water vapor to cool, condense and collect.
It released large amounts of oxygen into the air
It warmed Earth's surface preventing materials from freezing.

Answers

It blocked the suns harmful UV rays

Answer:

the ozone layer blocks the sun's harmful Uv rays.

PLEASE HELP ITS DUE IN 30 min

Answers

Answer:

Question 2 True

Question 3 True

Explanation:

Which strategy do geologists use to locate the center of an earthquake? A. They only analyze local data. B. They collect data from seismographs. C. They measure arrival times of surface waves. D. They draw squares on maps for measurements.

Answers

Answer:

the answer is (B) "They collect data from seismographs."

Explanation:

i got a 100 on the Quiz "Earthquakes"

The strategy that geologists use to locate the center of an earthquake is they collect data from seismographs. Thus, the correct option is B.

What is an Earthquake?

An earthquake may be defined as an activity that involves the unanticipated and brutal shaking of the ground, generally causing huge destruction, as an outcome of movements within the earth's crust or volcanic action.

Geologists utilize an instrument that is known as a seismograph that measures the strength of an earthquake. With the help of this instrument, they find the center of an earthquake on the basis of the highest strength.

Therefore, the strategy that geologists use to locate the center of an earthquake is they collect data from seismographs. Thus, the correct option is B.

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Calculate if 1000 units of energy are available at the producer level of the energy pyramid about how many units are available for first level consumers? Second level consumers? Third level of consumers?

Answers

Answer:

first level consumers?- abou 100 units

Second level consumers- about 10 units

Third level of consumers- about 1 unit

Explanation:

Food chain describes the feeding pattern of a group of organisms in an ecosystem. The food chain shows how one organism in one TROPHIC LEVEL feeds on another organism in another. As organisms are being fed on, energy is being transferred.

A food chain always starts with a PRODUCER, which occupies the first and lowest trophic level. It creates the energy transfer as it obtains energy via photosynthetic process. The flow of energy as shown by an energy pyramid is Producer----First level consumer----Second level consumer------Third level consumer.

However, only about 10% of the available energy is transferred and accessible by the next organism. This is because about 90% of the energy has been lost as heat when the organism undergoes metabolic processes. Hence, if 1000 units of energy was present at the producer level, 10/100 × 1000= 100 units will be available to first level consumers.

Also, 10/100 × 100= 10 units of energy will be available to second level consumers and finally 10/100 × 10= 1 unit of energy will be available to talk third level consumer.

What effect do you expect this will have on mature oyster numbers, and why?

Answers

What is in the context because idk what it’s reallly asking

which organisms obtain energy from dear decaying matter​

Answers

Saprotrophs or saprophytes. Variety of fungi and bacteria. Also number of organisms that resembles fungi like a water mold

Answer:

Decomposers

Explanation:

This group is made up of fungi, bacteria, and invertebrates. These organisms obtain their energy from breaking down dead organisms.  

These connect bones to muscles. A. Joints B. Marrow C. ligaments​

Answers

Think it's C since joints connects two bones together and marrow is inside bones.

It should be tendons.

Vhat role does cellular respiration play in the carbon cycle?

Answers

Answer: it releases CO2 into the atmosphere

Explanation:

Cellular respiration is the process by which organic sugars are broken down to produce energy.

CAN SOMEONE PLEASE ME HELP ILL MAKE BRAINLIEST

The Nervous System carries information and communication in the form of

A. electricity
B. homeostasis
C. electromagnetic waves
D. impulses

Answers

I honestly think it is D. Impulses.
I’m pretty sure it’s d!

Is it true that the breakup of Pangea caused climate changes that caused organisms to adapt or die off, this occured during the Paleozoic era.

Answers

Answer:

false

Explanation:

Which of the following go through the process of photosynthesis?

Answers

Answer:

It's green plants and certain other organisms that transform light energy into chemical energy.

Explanation:

Which cells are biconcave in shape and have no nucleus?

Answers

Answer:

It simply allows the red blood cell to have more hemoglobin. The more hemoglobin you have, the more oxygen molecules you can carry. Therefore, it allows RBC to transfer more oxygen. Lack of nucleus in RBC also allows the cell to have an unique bi concave shape that helps with diffusion.

Explanation:

found it on the internet:)

red blood cells. note to remember that RBC are the only type which has no nucleus

Select the correct answer.
A particular population of chickens has a frequency for the dominant allele as 0.70 and a frequency for the recessive allele as 0.30. Which expression is the correct way to calculate the frequency of individuals that are heterozygous?

Answers

Answer: 2 x (0.70) x (0.30)

Answer:

80/200

Explanation:

PLATO

;)

How do the HOX genes in the paddlefish match the HOX genes in humans ?

Answers

Answer:

Hox genes are known as homeobox genes and they help in the morphological arrangement and development of different cells from the head to the toe of animals.

These genes are responsible in the patterns exhibited by our own hands and feet. The paddlefish Hox genes helps in the formation and arrangement of its skeletal bones which is more developed than other teleosts.

In which two ways will a dog contribute to the carbon cycle

Answers

Dogs tend to eat meat, after all, and meat production is a major contributor of greenhouse gas emissions. By one estimate, it's even the largest. And dogs tend to eat highly processed meat, so their carbon pawprint grows as their food is manufactured, and again as it is transported.

What type of mining is used for hematite?

Out of open cut mining, underground mining, dredge mining, leach mining, and petroleum wells

Will reward brainliest

Answers

Answer:

underground mining,

Explanation:

Underground mining, I hope this answer helps

PLZ GUYS I DONT KNOW WHAT TO WRITE ,I NEED UR HELP
I need a 2 complex questions about human overpopulation

Answers

Answer: ok ill help:

1. over population happens when too many babies are born and the place gets crowded

2. same thing happens is too many immigrants go to 1 place E.G UK

Answer:

Is overpopulation a problem only in areas where population density is high?

What is the connection between population growth and climate change?

Maria wanted to grow a fern in her backyard. Acting on a suggestion from a friend, she collected brown dots from the underside of a fern’s leaves and then potted them. After a few days, Maria saw small fern leaves erupting from the pot. Which statement explains this phenomenon?

Answers

“After a few days, Maria saw small fern leaves erupting from the pot” is the statement where the phenomenon occurs

Answer:hypogeal germination

Explanation:hypogeal germination is the phenomenon inwhich the epicotyl elongate and the cotyledons remains below the soil.

In a _____ circuit, the current is the same everywhere.​

Answers

Answer:

A series circuit

Explanation:

In a series circuit, the current is the same everywhere.

Answer:

series circuit

Explanation:

B. Fill in the blanks:
1. Deficiency diseases can be prevented by eating what​

Answers

Answer:

Stopping behaviors that contribute to the deficiency, such as unhealthy eating, smoking, and heavy alcohol use, can help prevent vitamin deficiency anemia. Eating a healthy diet can lower your risk of developing the condition. Some people take a daily vitamin supplement to help prevent the condition.

Answer:

They can be prevented by eating healthy food or a daily vitamin supplement to help prevent it.

Explanation:

Stopping behaviors that contribute to the deficiency, such as unhealthy eating, smoking, and heavy alcohol use, can help prevent vitamin deficiency anemia. Eating a healthy diet can lower your risk of developing the condition. Some people take a daily vitamin supplement to help prevent the condition.

I would like to say that I did not copy from the previous answer but that I just googled deficency deises and used their explenation to help with my answer and that i didn't see their answer until after I had posted mine.

In which two City below would be able to hold more water vapor? Explain your answer.

Boise, Idaho - 25 C
Austin, Texas - 35 C

Answers


Texas because hotter temperatures hold more water vapor. Essentially, hot air expands and rises and cold air contracts and gets denser and shrinks

Where do eggs from fern grow?

Answers

Butt hole akaiskinsisnssnsisnsis
Other Questions
Janus Coat Company purchased a delivery truck on June 1 for $30,000, paying $10,000 cash and signing a 6%, 2-month note for the remaining balance. The truck is expected to depreciate $6,000 each year. Janus Coat Company prepares monthly financial statements. Prepare the general journal entry to record the acquisition of the delivery truck on June 1st. (Credit account titles are automatically indented when the amount is entered. Do not indent manually.) Suppose a student carrying a flu virus returns to an isolated college campus of 7000 students. Determine a differential equation governing the number of students x(t) who have contracted the flu if the rate at which the disease spreads is proportional to the number of interactions between students with the flu and students who have not yet contracted it. (Use k > 0 for the constant of proportionality and x for x(t).) Stillman claims that, real and sometimes painful losses can occur from our drive to constantly achieve.A- Stillman claims that "real and sometimes painful losses" can occur from our drive to constantly achieveB- Stillman says real and sometimes painful losses happenC- Real and sometimes painful losses are possible, says StillmanD- Stillman says "Individuals need to locate themselves on a spectrum of ambition and become fully aware that moving in one direction or theother involves real and sometimes painful losses." If h(x) = x 7 and g(x) = x2, which expression is equivalent to (g circle h) (5)? If f(x) = 3x2 + 1 and g(x) = 1 - x, what is the value of (f - g)(2) HURRYYYYYWhat is the first term in the sequence for which d = -2 and a7 = 3?a.-6c.15b.12d.-12 Describe New Mexicos judicial system 1. A business incurs the following costs: Labor: $105/unit Materials: $35/unit Rent: $400,000/month Assume the firm produces 1 million units per month. The total variable cost, per month, is_______million. The total fixed cost, per month, is $______million. The total cost is $_______million.2. A local coffee shop is hoping to make use of its excess restaurant capacity in the evenings by experimenting with selling beer and wine. It speculates that the only additional costs are hiring more of the same sort of workers to cover the additional hours and costs of the new line of beverages. Which of the following are examples of hidden costs that are likely to emerge from this decision? A. Training costs for new and existing employees on beer and wine serving procedures.B. Increased insurance premiums due to the presence of alcohol at the coffee shop.C. The cost of maintaining the machines that make the coffee.D. The monthly rent paid for the building.E. The forgone revenues that could be earned by renting the coffee shop out for other events during evening hours.3. Students doing poorly in courses often consider dropping the courses. Many universities will offer a refund if the student drops a course before a deadline.A. TrueB. FalsePrior to the deadline, students should not take this refund option into account when deciding to drop the course.A. True B. False How do people in the United States benefit from globalization?O A. Economic growthO B. Wage increasesO c. Job securityO D. Greater exports Which property allows you to write the expression(3 + 7i) + (8 6i) as (8 6i) + (3 + 7i)? Who failed to support civil rights for freed slaves? (wrong category by mistake, not mathematics) Compare and contrast John Locke and Jean-Jacques Rousseaus political philosophies. What option best completes the following sentence?Displacement is distance combined with ______________.AdirectionBmotionCspeedDvelocity In your own words what is the purpose for reading this text? Under the mesquite Compare communication and proactive communication. How will the major differences help you succeed in school? Trina's parents gave her complete freedom while she was growing up, rarely disciplining her. Her parents' parenting style would most likely be called __________, and Trina was likely __________ as a young girl Jack and Rebecca Pearson just had triplets. They want to have enough money for theirchildren's college fund. So they decide to deposit $100 at the end of each quarter for 20years into an account paying 4.2% annual interest compounded quarterly.a) How much is in the account at the end of 20 years?b) How much did the Pearsons actually contribute to the college fund account?c) How much interest did the account earn in those 20 years? You were preparing the slides and accidentally spilled some broth inoculated with unknown but potentially highly pathogenic bacteria over the table. Your partner did not notice that and put the marker on that spot while labeling the slides. Then he passed marker to the other working pair of students. 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