Which of the following describes a properly conrtolled experiment?

help pls and thanks

Answers

Answer 1

Answer:there is nothing to choose from

Explanation:

Answer 2

Answer:

Wheres the question lol?

Explanation:


Related Questions

which statement is true of both mitosis and meiosis?

A) The number of
chromosomes is reduced by half.

B) both occur only in reproductive cells.

C) DNA replication occurs before the division of the nucleus.

D) both are involved in asexual reproduction.

Answers

Answer:

The statement 'b. both occur only in reproductive cells' is true

Why was the Battle of Bunker Hill important in the war for American independence from Britain? A. The battle was the first important victory for the fledgling Continental Army. B. The battle was the first important victory for General George Washington. C. Although the British ultimately won the battle, they lost their best general. D. Although the British ultimately won the battle, they suffered heavy casualties.

Answers

Answer: D. Although the British ultimately won the battle, they suffered heavy casualties.

Explanation: Even though they lost, the colonial forces were able to inflict a substantial amount of damage resulting in lots of casualties.

a note on Diversity among protoctista (10 to 12 lines)​

Answers

Answer:

Protists are a diverse collection of organisms. While exceptions exist, they are primarily microscopic and unicellular, or made up of a single cell. The cells of protists are highly organized with a nucleus and specialized cellular machinery called organelles.

Kingdom Protista is said to be the most diverse kingdom, because each of its members are so individual from each other. If an organism does not belong any particular kingdom, it goes into kingdom Protista. ... This miscellanous grouping causes the organisms in the kingdom to be very different from each other.

Explanation:

Hope this helps

advantages of being sessile in invertebrate​

Answers

Sessile animals such as sponges, corals, and anemones attach themselves to the bottom or substrate. This sessile lifestyle is advantageous to these organisms, because they do not have to expend large amounts of energy to move through the water to get food.

Answer:

Sessile organisms benefit from lower energy expenditure than motile creatures and can thus subsist on relatively low amounts of food, as they have a low metabolic rate.

can someone help me with this question?

Answers

Answer:

email ur teacher

Explanation:

teacher know the answer

Plz do 10 and 14❤️❤️❤️❤️

Answers

Answer:

no

Explanation:

g Two linked genes, (A) and (B), are separated by 18 centiMorgans. A man with genotype Aa Bb marries a woman who is aa bb. The man's father was AA BB. What is the probability that their first child will both be ab/ab

Answers

Answer:

The probability that their first child will both be ab/ab = 41%.

Explanation:

Available data:

Two linked genes  (A) and (B) ⇒ 18 centiMorgans apartMan ⇒  Aa BbMan´s father ⇒ AA BBWoman ⇒ aabb

The recombination frequency is given by the distance between genes. We have to know that 1% of recombinations = 1 map unit = 1cm.

Recombination frequency = 0.18

Man: AaBb

Gametes) AB Parental

                 ab Parental

                 Ab Recombinant

                 aB recombinant

18 centi morgan = 18 % of recombination in total  

                            = % aB + % Ab  

                            = 9% aB + 9% Ab

       100% - 18% = 82% of parental in total  

                           = % of AB + % ab  

                           = 41% AB + 41% ab

The frequency for each gamete is:

AB 41%

ab 41%

Ab 9%

aB 9%

Cross: man x woman

Parental)          AaBb           x          aabb

Gametes) AB, Ab, aB, ab        ab, ab, ab, ab

Punnett square)     AB ( 41%)       Ab (9%)      aB (9%)       ab (41%)

                   ab      AaBb               Aabb          aaBb            aabb

                   ab      AaBb               Aabb          aaBb            aabb

                   ab      AaBb               Aabb          aaBb            aabb

                   ab      AaBb               Aabb          aaBb            aabb

F1) 41% of the progeny is expected to be AaBb

     9% of the progeny is expected to be Aabb

     9% of the progeny is expected to be aaBb

     41% of the progeny is expected to be aabb

Fracking is a way to obtain oil and natural gas trapped in rock. During
fracking, a mixture of water, sand, and chemicals are forced into the rock,
causing it to fracture and release the natural gas or oil it contains. Fracking
can harm the environment when it releases water pollution or air pollution
How could scientists best cooperate to use scientific research to prevent this
problem?

A. They could reduce their use of fossil fuels to decrease the demand for fracking.

B. They could avoid fracking when they are studying the environment

C. They could agree to use only fossil fuels from sources other than fracking.

D. They could develop technologies that help prevent the release of pollutants while fracking.

Answers

Answer:

A. They could reduce their use of fossil fuels to decrease the demand for fracking.  

C. They could agree to use only fossil fuels from sources other than fracking.

Explanation:

Scientists prevent the problem of pollution that occurs through fracking is that    they could reduce their use of fossil fuels so in this way decrease the demand for fracking also occur and they could use only fossil fuels from sources other than fracking. These two ways can help to reduce the pollution that occurs due to the process of fracking so we can say that decrease the use of fossil fuel and use of other sources of fossil fuel can reduce this problem.

Which statement about the members of a population that live long enough to reproduce is consistent with natural selection?
A.They transmit characteristics aquired by use and disuse to their offspring
B.They tend to produce fewer offspring than others in the population
C.They are the ones that are best adapted to survive in their environment
D.They will perpetuate unfavorable changes in the species.

Answers

Answer:

It's option B

Explanation:

Organisms which can't survive harsh times and have a small lifespan make huge amount of offsprings like ants. While long living animals make fewer offsprings like humans, whales, tortoises.

In cellular respiration, glucose molecules are split into _____ and______atoms.
O hydrogen and oxygen
O sulfur and lithium
O glucose and fructose
O carbon and nitrogen

Answers

In cellular respiration, glucose molecules are split into _____ and______atoms.

☑ hydrogen and oxygen

O sulfur and lithium

O glucose and fructose

O carbon and nitrogen

Because glucoses consistuents are H,C,O so most possibly opt 1 is correct.

Answer:

a

Explanation:

in cellular respiration, glucose molecules are split into hydrogen and oxygen atoms just as sofia has said.

Have a nice day ! :-)

The larva of moth is known as

Answers

The larva of moth is known as [tex]\sf\purple{caterpillar}[/tex].

[tex]\bold{ \green{ \star{ \orange{Mystique35}}}}⋆[/tex]

que es la educación,.......​

Answers

Answer:

el proceso de recibir o dar instrucción sistemática, especialmente en una escuela o universidad.

Explanation:

espero que esto ayude!

bacteria is an example. of a​

Answers

Answer:

prokaryotic cell or prokaryotes they are living and an example would be E.coli or salmonella

Explanation:

Genes A and B are on the same chromosome. The genes have alleles A and B on one homologous chromosome, and the alleles a and b on its paired homolog. How could an individual with this allele arrangement produce a gamete with a chromosome containing the alleles Ab or aB?

Answers

Answer:

Through the process of crossing-over

Explanation:

During prophase 1 of meiosis, each chromosome carefully pairs with its homologous chromosome. Homologous chromosomes aline together to make the crossing-over possible, the stage where they interchange their parts.

Crossing-over occurs between two homologous chromosomes in the equatorial plane, making the daughter cells genetically different from the original one.

The point where two chromatids interchange their genetic information is the chiasma, where new genetic material or information is produced to be inherited by descendants. Chiasma allows the crossing-over between two homologous chromatids, one of each parent.

The Crossing-over frequency between two genes depends on the distance between them. A short distance between genes is a small target for crossing-over to occur, which means that only a few of them will happen, compared with the number of events between genes that are more separated from each other.

In the exposed example, the chiasma must be placed between A and B genes.

Before crossing-over

homologous chromosome 1    --------A------*-----B---------homologous chromosome 2   --------a------*------b--------

The symbol * represents the area where the chiasma places and crossing-over occurs.

After csossing-over

chromosome 1    --------A------*-----b--------chromosome 2   --------a------*-----B--------

Need help answering this question, check the picture

Answers

Answer:

A single replacement reaction occurs when an element reacts with a compound to produce a new element and a new compound. It can only occur when the element that is doing the replacing is more reactive than the element that is being replaced. Therefore, it is useful to have a list of elements in order of their relative reactivities. The activity series is a list of elements in decreasing the order of reactivity. Since metals replace other metals, while nonmetals replace other nonmetals, they each have a separate activity series.

There are two types of single replacement reactions:

A metal replaces another metal that is in solution:  

A + BC → B + AC

Example:  Zn + CuC[tex]l_{2}[/tex] → Cu + ZnC

A halogen replaces another halogen that is in solution:

A + BC → C + BA

Example: Br[tex]_{2}[/tex] + 2KI → I

1. Indicate patient history details that are consistent with the patient having an infection. How do the patient’s signs and symptoms compare to a healthy individual?

2. Indicate what you suspect might be the etiological agent. What additional history would you like to have?


3. Based on the microbe you suspect is responsible for the symptoms, from which body sites would you recommend taking culture?




4. . Give culture and test characteristics of the microbe you suspect might be causing the disease. If you suspect more than one might be responsible, how might you distinguish the two?





5. Indicate virulence factors possessed by this microbe that might be responsible for the symptoms. Indicate how it produces the symptoms you observe in the patient.



6. Is this microbe normal microbiota at the culture site?




7. What type of treatment would be used for this patient

Answers

Answer:

All the answers are there in the photo

As a fishery scientist, you notice that very few cod fish have been caught in the past year. You still see very young and larval cod fish in the water, but very few adults. Explain three actions you would include in a plan for the recovery of the cod fish. Explain how you would need to address the Tragedy of the Commons to encourage those using the resource to use it appropriately.

Answers

Explanation:

1 Protection

2. Not getting caught for a few years

3 Deployment of Supervisors by the Government

If a horse sheds there coats in the spring and summer to allow for easier cooling during warm weather.

Is it Stimuli or Homeostasis?

Answers

The correct answer is homeostasis

Answer:

hi l have a question

Explanation:

can you help me

witch characteristics do Jupiter and Saturn share

Answers

Answer:

Characteristics that Jupiter and Saturn share are:-

They are the same size as earth. They have rings. They have thick atmospheres.Saturn and Jupiter have attracted as much similar gas as they could, to form two biggest gas giants in our solar system.

Which is a compound?

Answers

Answer:

A thing that is composed of two or more separate elements; a mixture is called compound.

Amino acids join together to create:
A. nucleic acids
B. carbohydrates
C. lipids
D. proteins

Answers

Answer:

D they join together to create proteins

Question :- Amino acids join together to create:

A. nucleic acids

B. carbohydrates

C. lipids

D. proteins

ANSWER :- D. proteins

Proteins are linear polymers formed by linking the α-carboxyl group of one amino acid to the α-amino group of another amino acid with a peptide bond

What could a human living now and a dinosuar living millions of years ago have in common?

help now pls im desperate

Answers

Answer:

We both drank the same water, due to the water cycle

Or you can say: We both breathed the same air

Explanation:

Which accurately describes one way that coastal mountains affect a region’s climate?

Answers

Answer:

In what ways do coastal mountains affect a region's climate? ... They increase precipitation on the windward sides of mountain ranges. They force cool, moist air from oceans to rise as they move toward land. They decrease precipitation totals on the leeward sides of mountain ranges.

Explanation:

On the windward faces of mountain ranges, they boost precipitation. As they approach near land, they drive cool, moist air from the oceans to rise. On the leeward sides of mountain ranges, they reduce precipitation totals.

☆彡Hanna

#CarryOnLearning

What types of materials could be broken dowr in a compost pile?

Answers

Browns (dead leaves, branches, twigs)
Greens (vegetable waste, fruit scraps, grass clippings)

Please match the interleukins with the statements that most accurately describe them to test your understanding of the actions of interleukins in the early reactions of recognition and activation.
1. produced by the APC to activate the helper T cell
2. produced by the helper T cell to stimulate a general increase in activity of committed B and T cells

Answers

Answer:

1. produced by the APC to activate the helper T cell

Explanation:

Apc is T cell

due to mendels law of sergregation

Answers

Answer:

Due to the law of segregation each allele is it's own entity and always has an equal chance of being passed on to the next generation. This means that regardless of whether the allele it will be passed on in the same frequency

2) Does the way the fruit is prepared make a difference to your experiment? Explain.

I'm doing a lab with fresh fruit vs canned fruit with gelatin and I know the fresh pineapple it wont set up but not sure if I heat the fruit up will it not set up from that

Answers

The answer depends on what exactly you’re experimenting / testing. But I would say yes, because fresh fruits and canned fruits aren’t exactly the same. Canned fruits have things such as preservatives in them, which could make a difference in your lab.

The order of amino acids in a protein does not matter

Answers

Answer:Amino acids, often referred to as the building blocks of proteins, are compounds that play many critical roles in your body. They're needed for vital processes like the building of proteins and synthesis of hormones and neurotransmitters.

Explanation:

How have humans impacted the planet?
How this contributed to climate change?
Give at least 5 examples.​

Answers

Answer:

humans have impacted the planet by building and changing the envoirment in order to surive

Explanation:

this impacted climate change because

1- polluion- gases for the companies that human built polluted the air

2- disturb wildlife- building/constructing things can impact animal shelter

3- overpopulation- having too many people in one area is harmful to the emviorment as well as leading to climate change over time

4- burning of fossil fuels- increased greenhouse effect

5- farming lifestock

Biology
what is carbohydrates

Answers

Answer:

Simple carbohydrates are broken down quickly by the body to be used as energy. Simple carbohydrates are found naturally in foods such as fruits, milk, and milk products. They are also found in processed and refined sugars such as candy, table sugar, syrups, and soft drinks.

Other Questions
Originally a rectangle has dimensions 12in by 8in. if the same amount increases on both sides, the area is doubled find the new dimensions Sus hermanos ___ llaman Jos y Mariela.mese What is the value of x to the nearest tenth?21.40.54.7 Why does Benvolio think that Romeo should attend Capulets party? What about a modern performance of a Shakespearean play could bechanged without affecting the play's meaning?A. The plot pointsB. The relationship among the characters C. The thematic questions D. The setting Find the solution of the system of equation shown on the graph Differences among individuals of the same species are known as:Different offsprings, from the same parents.A.Natural SelectionB.AdaptationsC.VariationsD.Fittness During exercise, what happens to breathing in humans? Which statement is true for the equation 4x - 4x - 5= -5? (5 points)It has no solutionIt has one solution.It has two solucionsIt has infinitely many solutions The following details are provided by a manufacturing company: Product line Investment $1,100,000 Useful life 12 years Estimated annual net cash inflows for first year $400,000 Estimated annual net cash inflows for second year $390,000 Estimated annual net cash inflows for next ten years $380,000 Residual value $70,000 Depreciation method Straight-line Required rate of return 14% Calculate the payback period for the investment. (Round your answer to two decimal places.) A new patient dressed in dirty clothesand with poor personal hygiene comes to the physician's office without anappointment. The patient's appearance indicates that this person may not be ableto pay for the office visit. In terms of nonverbal communication displayed by theoffice staff, how could the patient feel he or she is not to be seen? What bodylanguage will indicate that the medical assistant cares? Why is observation animportant component of communication? please yelp me find the area Plz help show work worth 10 points plz help ASAP!!!!!! Please answer this correctly without making mistakes A 5.00 mL sample of vinegar, a solution of acetic acid, is titrated with 0.756 M calcium hydroxide. 10.23 mL of the calcium hydroxide is required to reach the equivalence point. What is the molarity of the acetic acid in the vinegar. Use | = PRT to solve.(time is in years)P = $2,000R = 15%Find I.T = 2 years Briefly explain why adding insulation to an attic helps reduce heating costs. According to the fundamental theorem of algebra, how many zeros does the function f(x)= 3x^4 + x + 2 have? A square with an area of A2 is enlarged to a square with an area of 25A2. How was the side of the smaller square changed?The side length was increased by 5.The side length was multiplied by 5.The side length was increased by 10.The side length was multiplied by 10. One floor is randomly taken from avase containing 5 red flowers,2 white flowers, and 3 pink flowers.Find the probability of taking a redor a pink flower.