Scientists use many different methods of investigation. When possible, scientists want to actually experiment or observe an event. Which method is useful when developing a
scientific reasoning for an event that cannot be studied directly?
Conduct a field survey of bird populations in an area
Observe the effect of various fertilizers on corn crop yields
Use a computer model to study how the ocean liner Titanic sank
Use a wind tunnel to measure air drag on various types or automobiles

Answers

Answer 1

Answer:

Observe the effect of various fertilizers on corn crop yields

Explanation:

I think I'm right

Answer 2

Answer:

Observe the effect of various fertilizers on corn crop yields

Explanation:


Related Questions

You go to your 15 year high class reunion. You spend the night talking to your friends about all the fun but stupid things you did in high school. Memories for these events are

Answers

Answer:

there are many ways to describe this but... Special nostalgic and enyoyable are a few

Explanation:

Hope this helped

how is osmosis used to stop seizures

Answers

Because drinking water reduces the risks of triggering seizures seizure is most triggered by dehydration

who is credited with discovering the structure of DNA

Answers

Answer:

WATSON AND CRICK

Explanation:

they discoved it with help from rosaland franklin

Answer:

Watson and Crick

Explanation:

Energy level of liquid

Answers

Answer:

liquids have more kinetic energy than solids.

Explanation:

If If you add heat energy to I liquid the particles will move faster around each other as the kinetic energy between them increases. some of the particles will even have enough kinetic energy to break the liquid bonds and escape as gas aka evaporating

The Venn diagram compares aerobic respiration and anaerobic respiration.

A Venn diagram is shown. One circle is labeled aerobic and the other circle is labeled anaerobic.

Which statement should be categorized only in the aerobic section of the Venn diagram?
occurs in the cytoplasm
produces water
requires no oxygen
is performed by yeast

Answers

Answer:

Occurs in the cytoplasm.

Hope this help's you!

Answer:

its b produces water:) ∵∴∵∴∵∴

Explanation:

c) Why does the ethanol change colour?

Answers

Answer:

Ethanol change color because ethanol gets oxidized to form ethanoic acid whose color will change from orange to green.

Explanation: The ethanol will undergo an oxidation reaction where ethanoic acid is formed which will result in the formation of chromium disulphite.

Pea plants can have yellow seeds or green seeds Which conclusion about the meaning of Y is correct if the allele
combination Yy is for yellow seeds?
O yellow and dominant
O green and recessive
O yellow and recessive
Ogreen and dominant
Save and Exit
Next
Submit
Mark this and retum

Answers

Answer:

yellow and dominant

Explanation:

Gregor Mendel has stated that a gene comes with two alleles. According to his law of dominance, one of the alleles called DOMINANT allele is capable of masking the phenotypic expression of another allele called RECESSIVE allele.

In this question involving a seed color gene, which has two alleles Y and y. Y, which represents the dominant allele codes for the YELLOW trait while y, which represents the recessive allele codes for the GREEN trait. Therefore, a plant with Yy will have YELLOW SEEDS because the dominant allele (Y) is present.

The process of diffusion occurs when
A. all molecular movement stops.
B. molecules move from areas of lesser concentration to areas of greater
concentration
C. sugar molecules move into a cell.
D. molecules move from areas of greater concentration to areas of lesser
concentration.

Answers

Answer:

d

Explanation:

The process of diffusion occurs when molecules move from areas of greater concentration to areas of lesser concentration. The correct option is D.

What is diffusion?

The movement of essential, small molecules across the cell membrane as well as the movement of materials within cells both depend on the process of diffusion.

The exchange of gases in the lungs and gills is regulated by this process. As a byproduct of biological metabolism, carbon dioxide is released by all cells.

For example, when you pour a red color drop into the water, slowly the color molecules are evenly distributed in the whole water. It does not need any energy because it works according to the concentration gradient.

Thus, the correct option is D. molecules move from areas of greater concentration to areas of lesser concentration.

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Which system(s) are represented in this image?

A. Respiratory
B. Skeletal
C. Endocrine
D. Muscular

Answers

Answer:

I would say it looks like muscular, but Im not totally sure

Hope its the right answer though, :)

Explanation:

1)What is it about the structure of ATP that contributes to its ability to act as an energy currency?
2)When a phosphate is transferred from ATP, it can phosphorylate another molecule. How could this assist in allowing a protein to transport molecules against their concentration gradient?

Answers

Answer/Exlanation:

1) ATP (adenosine triphosphate) can be hydrolyzed such that it loses a phosphate group to form ADP (adenosine diphodphate). This is called ATP hydrolysis. This property allows ATP to act as energy currency because ATP hydrolysis releases the energy stored in the high energy phosphate bond.

2) Transporting molecules against their concentration gradient requires energy. When ATP loses its phosphate group, it can phosphorylate another molecule. This converts the molecule into its active state, giving that molecule the energy to pass through against the concentration gradient.

1) The ability of the ATP compound structure to act as an energy currency has been explained in the answers.

2) The method used by ATP to allow protein transport molecules against their concentration gradient has been explained below.

1) ATP is an acronym that stands for Adenosine triphosphate. This compound called ATP is divided into three phosphate groups with phosphate bonds that possess very high energy. Now, when water is added to ATP, the phosphate bonds that possess high energy will be broken down thereby releasing energy and producing adenosine diphosphate (ADP).

2) We saw above that when ATP undergoes hydrolysis, the phosphate bonds are broken down to form ADP and releases energy. However, it can undergo further phosphorylation to form another molecule which becomes energized when it goes to a higher energy state.

Now, In this higher energy state it gets to, it will be observed that the protein will possess enough energy to transfer molecules against a concentration gradient that requires energy.

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Which organelles work together to provide a plant cell with structure and
support?
A
the cell wall and large central vacuole
B. the cytoskeleton and cell membrane
C
the cytoskeleton and nucleus
D
the cell wall and chloroplasts
OU

Answers

Answer:

d the cell wall and chloroplasts

Explanation:

How can a scientific law be used to answer a specific question about an observed phenomenon?

A. A law can suggest an explanation for an observed phenomenon that will always be proven as fact
В. A law can offer an explanation for an observed phenomenon that is considered to be universally true

C.A law can only suggest an explanation for an observed phenomenon and cannot be tested through experimentation

Answers

Answer: B

Explanation:

Laws are explanations considered to be universally true

What is seeditis? Please help

Answers

Answer:

Seeditis is a fast, easy to use payment system built on the Tron Network. It seeks to give power back to content creators by facilitating a decentralized economy using crypto payments. ... In under a week since launching on Twitter, it rocketed to over 10MM TRX and 50K+ transactions!

Explanation:

Answer:

Seedit is a fast, easy to use payment system built on the Tron Network

Explanation:

How can citizens protect civil liberties?

Answers

authorizing the indefinite incarceration of non-citizens based on mere suspicion, and the indefinite incarceration of citizens designated as "enemy combatants" without access to counsel or meaningful recourse to the federal courts;

(b) limiting the traditional authority of federal courts to curb law enforcement abuse of electronic surveillance in anti-terrorism investigations and ordinary criminal investigations;

(c) expanding the authority of federal agents to conduct so-called "sneak and peek" or "black bag" searches, in which the subject of the search warrant is unaware that his property has been searched;

(d) granting law enforcement and intelligence agencies broad access to personal medical, financial, library and education records with little if any judicial oversight;

(e) chilling constitutionally protected speech through overbroad definitions of "terrorism";
Civil liberties protect us from government power. They are rooted in the Bill of Rights, which limits the powers of the federal government. The government cannot take away the freedoms outlined in the Bill of Rights, and any action that encroaches on these liberties is illegal.
Here you go :)

how is energy lost from from an ecosystem?

Answers

Answer:

Energy that is not used in an ecosystem is eventually lost as heat. Energy and nutrients are passed around through the food chain, when one organism eats another organism. ... In each case, energy is passed on from one trophic level to the next trophic level and each time some energy is lost as heat into the environment.

Describe two ways in which the teeth of a dog are different to those of a human.​

Answers

Humans have 8 incisors that we use to bite on our food. Dogs have 12 incisors that they use to rip off meat from the bone. Dogs also use their incisors to groom themselves and get rid of fleas, mites and other foreign objects on their skin and coat.

you can paraphase or something

Humans have 8 incisors that we use to bite on our food. Dogs have 12 incisors that they use to rip off meat from the bone. Dogs also use their incisors to groom themselves and get rid of fleas, mites and other foreign objects on their skin and coat.
Hope it helped you

Why is poriferans important to marine ecosystem? Explain

Answers

Sponges generally require a solid support for attachment, they are often found in rocky marine areas or on the ocean floor. Sponges are critical components of the ecosystems of coral reefs, where they provide shelter for a variety of organisms including shrimp, crabs, and algae.

Deciding whether to buy a new lightweight helmet that provides less protection than a heavier helmet is an example of
A. risk-benefit analysis.
B. using technology wisely.
C. increasing the pace of life.
D. technology’s impact on the environment.

Answers

Answer:

The ways in which people change the world around them to meet their needs or solve practical problems are called

technology.

What is the goal of technology?

to improve the way people live

Science and technology are

dependent on each other.

A. risk-benefit analysis

What are enzymes and how are they important to living things ?

Answers

Answer:

Enzymes are proteins that act as biological catalysts,  Enzymes speed up chemical reactions that take place in cells.

Explanation:

Could there be some kind of molecular editing system ? What tools could be devised to work with genes? Could scientists then create tailored DNA molecules

Answers

yes. there already is, scientists can genetically modify plants by adding or removing genes to make them different such as make a corn stalk have 4 ears instead of 2. but also breeding like dogs and other animals is a form of molecular editing because they essentially cause a gene mutation that alters the gene sequence and created a tailored DNA molecule. like a golden doodle dog is a genetic modification of a golden retriever and a poodle it wasn’t a natural combination to begin with if you want to get into technicality’s all domesticated animals are genetically modified. BUT the plant example about GMO plants& foods is probably the best example. they can also make plant that have pesticides in their dna so they don’t have to spray them but they’re super toxic to humans and animals that eat them.

Find the domain and range of the function. f(x)=|2x|-sin x

Answers

Answer:

Domain: (-∞,∞) , {x|x ∈ R}

Range: , {x|}

Explanation:

Click on "Embankment dam at a gold mine." Of the two opinions to consider in this case, which one presents a stronger argument? How does that help you make your final decision as the consulting dam engineer? What was your decision for this dam, as the consultant? How can you accomplish this and still stay within your budget? (Site 1)

Answers

Answer:  The strongest argument is the one that refers to security of people. This helps me to make a final decision, to ensure that there will be no accidents and guarantee that the mine will be used to generate moeny. So my decision is to repair it but choose to repair only the most urgent parts, to still stay within the budget.

Explanation:

A gold mine is a place where gold is extracted from the ground. Because of its value, the extraction of gold generates economic and social benefits all over the world, which has made this activity one of the most important in the world. There are also many ways of extracting this mineral.

The best argument will be the one that indicates the greatest concern for the safety of the citizens of that city or town. If there is a dam, it should be repaired in the best possible way. This will ensure the safety of the town and guarantee that the mine continues to be used, to generate economic benefits. Then, if the gold mine continues to be used even if it is not productive as it was, it must be repaired. However, in order not to make large expenditures and have a low budget for repair, I can choose to repair only the most urgent or necessary part.

So, the strongest argument is the one that refers to security of people. This helps me to make a final decision, to ensure that there will be no accidents and guarantee that the mine will be used to generate money. So my decision is to repair it but choose to repair only the most urgent parts, to still stay within the budget.

True or False:
Evolution acts on life and leads to adaptations in species.

Answers

True. In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection.

What characteristic of viruses distinguishes them from cells?

Answers

Answer: Viruses, although not living things, do show some characteristics that they are living. Because they can't reproduce by themselves (without a host), viruses are not considered living. They are made of proteins and glycoproteins like cells are. They contain genetic information needed to produce more viruses in the form of DNA or RNA.

They are acellular, that is, they contain no cytoplasm or cellular organelles. They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery.

Why flower produces only a small amount of nectar (food for insects) at a time ​

Answers

Answer:

Nectaries are usually located at the base of the flower stamens, which draw animal visitors into contact with the pollen to be transferred. Most flowers secrete only relatively small amounts of nectar, which encourages cross-pollination, since animals must visit several flowers in order to receive a full meal.

Explanation:

do plant cells have organelles?

Answers

Answer:

Most organelles are common to both animal and plant cells. However, plant cells also have features that animal cells do not have: a cell wall, a large central vacuole, and plastids such as chloroplasts.

Explanation:

Yes they do most plant cells do

In a species of rabbit, F is the dominant allele for brown fur, and f is the recessive allele for black fur. Two rabbits have four offspring. Three have brown fur, and one has black fur. Which of the following could describe the genotypes of the parents?

Answers

Answer:

A.      Both parents are heterozygous, with one dominant allele and one recessive allele.

Explanation:

I just did it and I got it right

Both parents are heterozygous, with one dominant allele and one recessive allele. This statement describes the genotypes of the parents.

What is homozygous and heterozygous?

There are two sets of chromosomes found in human beings and the pair of alleles is known as homozygous and hetrozygous. Homozygous is defined as a particular person having two common or identical genes these are known as homozygous. Hetrozygous is defined as particular person having different alleles are known as hetrozygous.

Allele is defined as differentiation of the pattern of nucleotides at the common position on a long DNA molecule. Chromosomes are the long thread type structure present in the inner side of nucleus of plants as well as nucleus.

The main composition of chromosome is protein and DNA molecule. Chromosomes trasffers from one generation to other generation or from parents to their children and they carry genetic information.

Therefore, Both parents are heterozygous, with one dominant allele and one recessive allele. This statement describes the genotypes of the parents.

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Is Electrical Conductivity Physical or Chemical Property of cut and paste?

Answers

Answer:

Conductivity is a physical property because the identity of the substance does not change.

Hope that helps♡

WILL AWARD 70 points help ASAPPP
Which of the following is released from ATP and therefore provides “energy”?
A) water
B) Pi
C) glucose
D) ADP and Pi
E) ADP only

Answers

Waterrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Pi or inorganic phosphate is released from ATP and therefore provides energy.

What is ATP?

It is the energy-carrying molecule found in the cells of all the living things. It is a nucleotide, which comprises three main parts, that is,

The nitrogenous baseAdenineRibose sugarA chain of three phosphate groups combined to ribose

The tail of phosphate is the actual source of energy, which is tapped by the cell. The accessible energy is present within the bonds between the phosphates and is discharged when the bonds are dissociated. It takes place via the supplementation of a water molecule, the process known as hydrolysis.

Generally, only the outer phosphate is withdrawn from the ATP to produce energy, when this takes place ATP get transformed to ADP or adenosine diphosphate.

Thus, the correct answer is option B, that is, Pi.

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In a changing environment, which species will have the best chance for survival? Group of answer choices The ones that are super fast. The one with the largest population. The one with the biggest genetic variation. The one with the most intelligent individuals

Answers

Answer:

one with the largest poplation because they can cook,protect, and get supplies .

Explanation:

In a changing environment, the species which will have the best chances for survival are the one with the biggest genetic variation. Thus, the correct option is C.

What is Genetic variation?

Genetic variation is the difference in DNA present among different individuals or the differences between the populations. The multiple sources of genetic variation include mutations and genetic recombination in species. Mutations are the ultimate source of genetic variation, however other mechanisms, such as genetic drift, contribute to it, as well.

Variation allows some individuals within a population to adapt better to the changing environmental conditions. Because, the natural selection acts directly only on phenotypes, more genetic variation within a population usually enables more phenotypic variation in a population.

Therefore, the correct option is C.

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Other Questions
please help please help please help please help please help please help please help please help please help please help please help please help please help please help 1.) Yo a las siete. (baarse) 2.) Nosotros a las seis y media. (levantarse) 3.) Ellos en la maana. (peinarse) 4.) T a las siete y cuarto. (vestirse)* 5.) Nosotros a las seis y media. (ducharse) 6.) Ella los dientes todos los das. (cepillarse) 7.) Elena y Sara a las siete menos cuarto. (despertarse)* 8.) Pedro y yo no por la noche. (baarse) 9.) Yo a las diez y media cada noche. (acostarse)* 10.) Marcos y t los dientes despus de comer. (cepillarse) 11.) t antes de vestirse? (ducharse) 12.) A qu hora Paco y Jos? (vestirse)* 13.) Marisol y Lupe a las once y cuarto. (acostarse)* 14.) Yo la cara antes de acostarme. (lavarse) 15.) Ral nunca . (peinarse) 16.) Guillermo y yo a las once. (acostarse)* (Be careful here!) 17.) Rosa antes de secarse el pelo. (ducharse) 18.) A qu hora t? (despertarse)* 19.) Yo despus de secarme el pelo. (vestirse)* 20.) Ana y t a las seis y veinte. (despertarse)** What divided the states at the Constitutional Convention as they debated what kind of government they should have? What happens to financial security during a depression?a. benefitsb. challengesC. diminishes Lucy is writing about this excerpt from The Code Book. Only a small fraction of the information flowing around the world is securely encrypted, and the remainder is poorly encrypted, or not encrypted at all. This is because the number of Internet users is rapidly increasing, and yet few of these people take adequate precautions in terms of privacy. In turn, this means that national security organizations, law enforcers and anybody else with a curious mind can get their hands on more information than they can cope with. Which of Lucys lines best shows that she has made a personal connection to the reading? The author is explaining that much information is not encrypted. The author is explaining that Internet users must be more careful. This book helps me realize that much of my online information is not secure. This book helps me realize that there are too many people using the Internet. HURRY IM TIMED AND THANK YOU 67 times a number minus 65 is equal to -4 less than the number can you guys match the words to the definitions for my science work on thermal energy please? What are the basis of making symbols???? What does the grid represent Solve the equation 7 minus 2X equals 19 2(3x - 5) < 4XSolve the inequality One gallon of gasoline in Buffalo, New York costs $2.29. In Toronto, Canada, one liter of gasoline costs $0.91. There are 3.8 liters in one gallon. How much does one gallon of gas cost in Toronto? Round your answer to the nearest cent. Is the cost of gas greater in Buffalo or in Toronto? How much greater? In the passage where the boy crumbles the letter what is the best established tone The gift box is 10 cm x 12 cm x 3 cm what is the volume of the box What two elements are major building blocks in glucose, fructose, and sucrose?A. Nitrogen and iodineB. Carbon and hydrogenC. Carbon and fluorineD. Phosphorus and helium True or false in the small intestine, nutrients are absorbed into the blood. At Supply World, 4 pens cost $10.00. How much do 3 pens cost if the price per pen is the same Simplify the expression 5(3x - 7 + 4y) Impressionistic art represents the? 3x + 2y = 6 is an equation in standard form.The value of y when x is 0 is .The value of x when y is 0 is .