The answer is A, ancient plant remains
Explanation:
Final answer:
Coal is composed mainly of ancient plant remains that were subjected to high temperatures and pressures over millions of years, resulting in a combustible sedimentary rock that can be used as fuel.
Explanation:
Coal is composed of ancient plant remains. It is a complex solid material that originates primarily from plants that died and were buried under sediment millions of years ago. These plants were then subjected to high temperatures and pressures, leading to the formation of coal. Coal is considered a sedimentary rock, and in some classifications, it is also identified as a biologic sedimentary rock because it forms from the accumulation and alteration of plant matter. There are four main types of coal, which are lignite, subbituminous, bituminous, and anthracite, with anthracite being the highest rated due to its heat generating capacity and lower sulfur content.
What about cellouse makes it ideal for structural support
Due to the strong intermolecular force of attraction in cellulose it provides high strength and support.
Explanation:Cellulose is a significant polysaccharide since it is the most copious natural compound on Earth. Cellulose is a significant segment of intense cell dividers that encompass plant cells, and it's what makes plant stems, leaves, and branches so solid. It absolutely takes a ton of effort to cause damage to the structure of cellulose.
Cellulose particles are arranged parallel to one another and are combined with hydrogen bonds. This structures long, link like structures, which join with other cellulose atoms and is the thing that produces such a solid help structure.
What does the field of biology study
Answer:
Biology deals with the study of living organisms present on earth. These could be ranging from the microscopic unicellular organisms to the more complex multicellular organisms, including bigger plants and animals.
The study of these organisms helps in understanding the structure, food type, development and growth, body functions and their distribution on earth.
The various sub-branches of biology are as follows-
1) Microbiology
2) Bioinformatics
3) Biotechnology
4) Genetic study
5) Botany
6) Medical
7) Zoology and some other fields.
The field of biology studies living things including plants and animals.
What does the field of biology study?Biology is a branch of natural science that examines living things. Due to the enormous variety of life on Earth, it is a highly broad field, hence individual biologists typically concentrate on particular fields. Either the scale of life or the types of species investigated are used to categorize these fields.
Botany, zoology, and microbiology are the three main subfields of biology. Zoology is the study of animals, botany is the study of plants, and microbiology is the study of tiny creatures.
Learn more about biology at; https://brainly.com/question/30451768
#SPJ6
Describe ways that water pollution occurs.
Answer:
water pollution is also one the major problem now due to over population n other thing
Explanation:
When some one throw waste in water then there is plastic also and other waste which contain different harmful chemical and directly mixed with water and pollute the water.
Water pollution is caused by contaminants entering water bodies, which can have detrimental effects on ecosystems and human health due to various pollutants. Eutrophication and oxygen-demanding waste are key factors contributing to water pollution.
Water pollution occurs through various means, including point source pollution (from a single site) and nonpoint source pollution (from multiple dispersed sites). Contaminants like chemicals, biological pathogens, and physical waste can lead to harmful effects on aquatic ecosystems and human health. Factors like eutrophication and oxygen-demanding waste contribute to water pollution, impacting water quality and organisms.
Match the terms to their definition. 1. dominant a gene or trait that is masked when a dominant gene is present 2. genotype a gene or trait that always expresses itself 3. hybrid an organism with one dominant gene and one recessive gene 4. phenotype the genes present in a specific trait 5. recessive the expression of a trait, or what the trait looks like
Answer:
1. recessive
2. phenotype
3. hybrid
4. genotype
5. dominant
Explanation:
1. recessive is the one that is being masked when a dominant trait is present in Law of Dominance
2. Phenotype is the gene or trait that expresses itself
3. Hybrid or heterozygous consists of an a dominant gene
example: Purple is dominant over white flowered pea plant
Y- purple y-white
Yy is the hybrid/ heterozygous pea plant because Y(purple) is dominant over y(white).
4. genotype refers to presence of the specific trait / the exact pairing of alleles.
example: YY, Yy and Yy
5. Dominant, expression of a trait and what it looks like.
example: Yy is a heterozygous or a hybrid plant. since Y is dominant over y then the looks of the plant will have a higher probability in resulting in to purple flowered pea plant.
In biology, the terms dominant, genotype, hybrid, phenotype, and recessive are related to genes and traits.
Explanation:1. dominant: A gene or trait that is masked when a dominant gene is present.
2. genotype: The genes present in a specific trait.
3. hybrid: An organism with one dominant gene and one recessive gene.
4. phenotype: The expression of a trait, or what the trait looks like.
5. recessive: A gene or trait that always expresses itself.
Learn more about Genes and traits here:https://brainly.com/question/11558941
#SPJ3
what kind of matter is formed when atoms of 2 or more elements bond
A molecule is formed.
_____ can produce their own food
Answer:
Autotrophs
Explanation:
Autotrophs can produce their own food.
Autotrophs are able to gather food from just their body and survive!
How is the range of a data set determined?
A. Sum of the data divided by the number of data points.
B. It is all real numbers.
C. Largest value plus the smallest value, divided by 2
D. Largest value minus the smallest value.
Answer:
D
Largest value minus the smallest value
Explanation:
The range of a set of data is the difference between the highest and lowest values in the set. To find the range, first order the data from least to greatest. Then subtract the smallest value from the largest value in the set.
The range of a data set is determined by taking the largest value and subtracting the smallest value. For a given example data set {3, 4, 5, 6, 9}, the range is calculated as 9 - 3, hence the range is 6.
Explanation:The range of a data set in mathematics is determined by subtracting the smallest value in the set from the largest value. This concept is used in statistical analysis to measure the dispersion or spread in a data set. So, the correct option from the choices you provided is D. 'Largest value minus the smallest value'. Let's look at an example: If we have a data set that includes the numbers {3, 4, 5, 6, 9}, the range would be calculated as 9 (largest number) minus 3 (smallest number), which equals 6. So, the range of this data set is 6.
Learn more about Range in Mathematics here:https://brainly.com/question/33612635
A scientist makes an image of all of a person's chromosomes. What
technique is she using?
O
A. Use of restriction enzymes
B. Polymerase chain reaction (PCR)
O
O
C. Karyotyping
O
D. Gel electrophoresis
Answer:
She is using Karyotyping
Explanation:
A karyotype is the number and visual appearance of the chromosomes in the cell nuclei of an organism or species.
In order to make an image of all of a person's chromosomes, the scientist uses Karyotyping.
What are chromosomes?Chromosomes are found in the nucleus of a cell. These chromosomes contain the units of inheritance called genes. The sequence of genes determines the characteristics of organisms.
Now, in order to make an image of all of a person's chromosomes, the scientist uses Karyotyping.
Learn more about chromosomes: https://brainly.com/question/1596925
#SPJ2
Which is not a high-level radioactive waste?
fuel rods
control rods
reactor coolant
contaminated clothing
ANSWER:
Contaminated clothing is not a high level radioactive waste but a low level radioactive waste.
EXPLANATION:
Radio-active waste is any waste that contains radio-active material and is usually a "by-product" of nuclear reactions. Radio-active waste is considered to be hazardous for all forms of life as well as the environment. High level radio-active waste contains high levels of radio-active material and therefore must be disposed as soon as possible. Contaminated clothing has very low level of radio-active waste that can be removed by washing in appropriate medium.Why is the fossil record incomplete? Choose all that apply.
Not all organisms are fossilized.
Not all scientists believe in the fossil record.
Not all fossils survive.
Not all fossils are found.
Answer:
The fossil record, however, is quite incomplete. Here's one major reason why: Sediment has to cover an organism's remains in order for the long fossilization process to begin. Most organisms decompose before this can happen.
Answer:
Not all organisms are fossilized. Not all fossils survive.Not all fossils are found.Explanation:
The most direct way to determine the age of a species is to observe in the fossil record what was the first occurrence of this species. The biggest problem is that the fossil record is very incomplete, because many times organisms decompose before being fossilized, and many fossils have never been found. In short, we can say that the fossil record is incomplete because not all organisms are fossilized, not all fossils survive and not all fossils are found. Moreover, the fact that one finds fossils of a species from a certain age does not mean that such a species originated at that time in geological history. It may be that records of the species's presence in previous ages have been lost.
If a population has MORE environmental resistance than biotic potential, it will ______
A. Increase
B. Decrease
C. Remain stable
D. Sharply rise and fall
Answer:
B. Decrease
Explanation:
If a population has MORE environmental resistance than biotic potential, it will decrease.
If a population has more environmental resistance than biotic potential, it will decrease. So, the correct option is (B).
What is Environmental resistance?Environmental resistance is defined as the process in which some different elements or factors prevent the growth of the species uncontrollably where as nature does something to control the growth of the species in order to reduce the excessive growth of population or over population.
"Environmental resistance" is related in a similar way to some factor that limits not only the growth of a species but also the rate of reproduction. Availability of certain necessary resources is the factor of environmental resistance which are as follows:
FoodWaterPredationDiseasesCollection of toxic metabolic wasteBehavioral change in speciesThus, if a population has more environmental resistance than biotic potential, it will decrease. So, the correct option is (B).
Learn more about Environmental resistance, here:
https://brainly.com/question/29347064
#SPJ2
which information must be known about a compound to find the molecular formula from the empirical formula
Answer:
Molecular mass or vapor density
Explanation:
The empirical formula is the simplest formula of a compound. The molecular formula expresses the exact formula of the compound. To derive the molecular formula, we need information about its molecular mass or if given the vapor density.
(Empirical Formula)n = Molecular formula ------(i)
n = number of repeating units of the empirical formula present in one mole of the molecule
also, (molar mass of empirical formula)n = molar mass of compound
From here, we can find n and insert in (i) above.
1 Point
Which statement describes the energy conversion that takes place during
photosynthesis?
O
A. Plants covert solar energy to kinetic energy.
O
B. Plants convert solar energy to chemical energy.
O
C. Plants convert kinetic energy to chemical energy.
O
D. Plants convert chemical energy to solar energy.
SUBMIT
Answer:
Option (B).
Explanation:
Plants are known as autotrophic organism as they can prepare their own food. The plants need sunlight, carbon dioxide and water for the photosynthesis.
Plants uses sunlight that contains the solar energy. This solar energy is converted into the chemical energy from the breakdown of water molecule and formation of carbohydrates. Hence, the solar energy of sun is converted into chemical energy.
Thus, the correct answer is option (B).
Which of the following describes an antibiotic that is good for a human to take as a medicine?
A. The antibiotic kills harmful bacteria but not human cells.
B. The antibiotic is a harmful substance called a toxin.
C. The antibiotic kills all living things, including bacteria and human cells.
D. The antibiotic provides food molecules that are needed for good health.
Answer:
The correct answer would be option A, The antibiotic kills harmful bacteria but not human cells.
Explanation:
Antibiotics are the medicines given to a person who gets sick due to a bacterial infection in his body. Bacterial Infection can not be treated without using the antibiotic medicines because antibiotics are the only medicines that kill the harmful bacteria inside a human body while keeping the human cells alive and healthy. Antibiotics do not harm the body cells. They just work on the bacterial infection and kill the bacteria. Other functions of the body are not disturbed by taking the antibiotics.
Complete the phylogenetic tree by matching each characteristic that arose during the evolution of animals to its correct position. ( Start from top to bottom boxes)
OPTIONS:
Backbone
Tissues
Coelom
Segmentation
Endoskeleton
Answer:
The correct characteristics are - tissue, coelom, segmentation, endoskeleton, and backbone from top to bottom boxes.
Explanation:
This phylogenetic tree showing the evolution and relatedness of the different organisms on their shared characteristics. In the given phylogenetic tree there are some characters are missing and we can predict or state them on the basis of evolution and studying the characteristics.
After the Porifera phylum tissue-level organization is found in the organism hence Tissue would be placed in the first box.
The coelom is found organisms above the Nematoda level, which further include a character segmentation in Annelida and Arthropoda. Another lineage from arising with the coelom organism that included endoskelton and backbone.
Thus, The correct characteristics are - tissue, coelom, segmentation, endoskeleton, and backbone from top to bottom boxes.
Answer:
tissue, coelom, segmentation, endoskeleton, and backbone
Explanation:
Why do some codons code for the same amino acid as another codon?
A. it is due to mutations.
B. There are only 20 amino acids and 64 possible combinations
C. Each codon is unique and they all code for different amino acids.
Answer:
it is B
Explanation:
I have answer this question once
Answer:
B. There are only 20 amino acids and 64 possible combinations
Explanation:
A codon is the combination of three nitrogenous bases, which encode an amino acid. Some codons encode the same amino acid as another codon, this is because there are only 20 amino acids and 64 possible combinations.
Amino acids, in turn, are the organic substances that form proteins that will be responsible for various functions in our body, such as structural, enzymatic, defense, transport and hormonal functions.
Which of the following groups of people would be the least affected by air pollution?
a. people with asthma
b. infants
c. teenagers
d. the elderly
Teenagers are the groups of people that would be the least affected by air pollution.
AIR POLLUTION:Air pollution is the release of harmful gases into the atmosphere. These pollutants include gases like carbon monoxide (CO), nitrogen dioxide (NO2) etc or particles like dust etc.
According to this question, air pollution can affect any group of people, however, some groups are more susceptible to air pollution than others.
Groups of people that are more susceptible to air pollution are as follows:
Asthmatic patientsElderlyInfants or babiesTherefore, teenagers are the groups of people that would be the least affected by air pollution because they have a stronger immune system than other groups.
Learn more about air pollution at: https://brainly.com/question/16357973
what is a plant root an example of
Answer:
Someone else answered it, but a plant root is a example of a a plant that typically lies below the surface of the soil.
Explanation:
Plant roots are integral to a plant's ability to absorb nutrients, provide structural support, store food, and sometimes propagate asexually. The tap root system, such as that of a carrot, features a main root with secondary roots, whereas a fibrous root system, like that of grasses, consists of a dense network of roots.
A plant root is an example of an organ in plants that plays a crucial role in water and nutrient absorption, anchorage, and sometimes storage and asexual reproduction. Dandelion, with its tap root, serves as a common example of a plant that utilizes its root system for these purposes. Roots can be specialized to perform additional functions such as the bulbous roots storing starch, the taproots of carrots, turnips, and beets being modified for food storage, and roots involved in asexual reproduction like the poplar and aspen trees that form clones from their roots.
There are two primary types of root systems: the tap root system and the fibrous root system. The tap root system consists of one main root, as seen in a plant like a carrot, whereas a fibrous root system, which can be found in grasses such as wheat, rice, and corn, has a dense network of roots closer to the soil surface. The former is typically found in dicots whereas the latter is often seen in monocots.
Which of these foods contain the most of Vitamin C and Fiber
A: Oats
B: Bananas
C: Pomegranates
D: Rice
Answer: B: Bananas
Explanation:
Bananas are the fruits which is most commonly found in many regions of the world. These are rich source of potassium, fiber, vitamin C, vitamin B6, manganese, protein, folate, riboflavin, niacin, and iron.
The bananas are useful for treatment of cancer, high blood pressure, cancer, diabetes, digestive problems and cardiovascular disease.
Vitamins are organic compounds that are essential for body growth and development.
Vitamins are obtained from vegetables and fruit. There are different types of vitamins present, Some of them are fat-soluble and some others are water-soluble.
Fat-soluble vitamins are as follows:-
Vitamin AVitamin EVitaminDVitamin KVitamin C is also known as ascorbic acid and can help in the development of body repair.
Each fruit and vegetable have vitamins in them. According to the question, Bananas and pomegranates have more vitamin C.
For more information, refer to the link:-
https://brainly.com/question/2084893
Which natural resource management approach acknowledges the uncertainties about the functioning of the natural resource systems?
Answer:
integrated management - C.
what are the types of mutations, and how does each alter the encoded protein? college level answer please
Answer:
point mutation missense mutation silent mutation non sense mutation
Explanation:
point mutation it change one base of DNA in this case nucleotide substitution occur like sickle cell missense mutation in this case replacement of one nucleotide nonsense mutation cause the replacement of codon silent mutation does not change the sequence of protein because of new triplets codes for the same amino acid
Mutations like missense, nonsense, frameshift, and substitution, can alter the encoded protein in different ways, potentially affecting the organism's characteristics and causing diseases. Mutations can cause single or multiple changes in amino acids, leading to altered protein function.
Explanation:There are several types of mutations that alter the encoded protein in different ways, including missense mutations, nonsense mutations, insertion or deletion mutations (frameshift mutations), and substitution mutations. Missense mutations cause a single change in an amino acid, which may or may not significantly alter the protein function. A nonsense mutation replaces an amino acid with a stop signal, resulting in a truncated and typically nonfunctional protein.
Frameshift mutations, caused by an insertion or deletion of a nucleotide that's not a multiple of three, result in changes to every subsequent amino acid, thereby producing a dramatically altered and generally nonfunctional protein. Substitution mutations replace one amino acid with another; if it occurs at a crucial point in the protein, it can cause significant changes to protein function.
Finally, in some cases, mutations cause repetitions of the same codon (trinucleotide repeat expansions), leading to repeated regions of the same amino acid in the protein. All these types of mutations can result in changes to the characteristics of an organism or can be potential causes for various diseases.
Learn more about Types of Mutations here:https://brainly.com/question/30337180
#SPJ2
A major polysaccharide found in plants is ________ and in animals is ___________.
A. glycogen, cellulose
B. starch, glycogen
C. starch, cellulose
D. glycogen, starch
A major polysaccharide found in plants is mainly starch and in animals it is glycogen. The correct option is B.
What is polysaccharide?Polysaccharides, also known as polycarbohydrates, are the most common carbohydrates found in foods.
They are polymeric long-chain carbohydrates made up of monosaccharide units linked together by glycosidic linkages.
A major polysaccharide found in plants is mainly starch and in animals it is glycogen.
Thus, the correct option is B.
For more details regarding polysaccharides, visit:
https://brainly.com/question/780562
#SPJ2
What are currents??????
A current is a rapid movement of ocean water. The wind also speeds up. Therefore, currents can be very dangerous. At the beach, you have to get out of the water at a certain time because currents can drag you under the water.
A geologist finds four layers of sedimentary rock. She determines that no geologic events have shifted the layers. She labels
the layers A, B, C, and from the top to the bottom.
Which statement about these layers is accurate?
As older than B.
Bis older than C.
C is younger than A.
B is younger than D.
Save and Exit
Nest
Save and Exit
Next
Submit
Submit
Mark this and return
Answer:
B is younger than D
Answer:
D-B is younger than D.
Explanation:
In sedimentary rocks, the bottom layers are older that overlaying layers. This is because sediments are placed on top of each other by surface runoffs to ocean beds. Therefore, the first sediments to be deposited will always be towards the bottom as more and newer ones are brought in and deposited.
what minimum internal temperature must the salmon reach cooking
Answer:
145 degrees
Explanation:
Because the united states food and drug administration recommends cooking salmon to an internal temperature of 145 degrees Fahrenheit. Push the tip of the meat thermometer gently into the middle of the salmon fillet at its thickest part.
Salmon should be cooked to a minimum internal temperature of 145°F, as measured by a food thermometer, to ensure it is safe to consume.
When preparing salmon, it is essential for safety and health to ensure the fish is cooked to the appropriate internal temperature. According to the USDA and food safety guidelines, seafood, including salmon, should be cooked to a minimum internal temperature of 145°F. This temperature should be measured using a food thermometer to confirm that the salmon has reached the temperature sufficiently high enough to kill harmful bacteria that can cause foodborne illnesses. Additionally, it's important to make sure that when cooking fish in a microwave oven, there are no cold spots where bacteria can survive. For even microwave cooking, cover the seafood, stir, rotate, and if no turntable is present, manually rotate the dish once or twice during cooking.
Which feature is characteristic of healthy coral reefs?
A. Shallow, clear water
B. Clear freshwater
C. Deep, salty water
D. Cold, murky water
Answer:
Answer A
Explanation:
The correct answer is option A, that is, shallow and clear water. Coral reefs refer to the shallow-ocean habitats, which are occupied with sea life. The massive composition that coral reef comprises of is actually manufactured of coral polyps that are the small marine species, which live in colonies.
The hard compositions are left behind when these marine species die, and the branching and stony composition, which is left is limestone and is robust enough to produce a home for new species.
Healthy coral reefs are characterized by shallow, clear water and high biodiversity. The organisms living in the reefs have a mutualistic relationship with photosynthetic unicellular algae, which provide them with nutrition and energy. This clear water allows light to penetrate, supporting the growth of both corals and algae.
Explanation:Coral reefs are ocean ridges formed by marine invertebrates living in warm shallow waters within the photic zone of the ocean. They are mostly found within 30 degrees north and south of the equator. Coral reefs are characterized by high biodiversity and the structures created by the invertebrates that live in them. They provide nourishment and shelter for a wide variety of species, including over 4,000 fish species.
Shallow, clear water is characteristic of healthy coral reefs. The organisms living in these reefs have a mutualistic relationship with photosynthetic unicellular algae, which provide them with nutrition and energy. The clear water allows light to penetrate, allowing the algae to carry out photosynthesis and the corals to thrive.
Read the paragraph. Then answer the question that follows. Perhaps you wanted pizza for dinner, but were out voted by the rest of the family who wanted chili. This is similar to what happens in a community. One person has to give up a right for the good of the group. Sometimes citizens' duties and rights conflict with each other. A good example is a public protest. People have the right to meet in groups and share ideas. However, a protest can disrupt traffic or other normal activities. A city must provide extra police protection to keep people safe. Therefore, the city has the right to require permission in advance for a protest. Government must make laws to balance the rights of individuals and different groups of people. Which of the following statements best describes this paragraph? The paragraph contains categories of comparison. The paragraph contains a simile. The paragraph contains no text connections. The paragraph contains an analogy.
Answer:the last one
Explanation:
Answer:
The paragraph contains an analogy.
Explanation:
Based on the above provided excerpt, we can see that the passage is an analogy on the two sides of every action. Just like the need to sacrifice the minority opinion for the majority, so is the same case for any protests or dissensions in a society.
Analogies provide comparisons between things for the better explanation of the issues concerned. By comparing the majority and minority opinions through the examples of "family pizza", " protests"or even "community rights", the author makes it a point to show the two sides of any story. Of course both opinions matter but for the sake of a democratized and equal footing of the two parties, there had to be some compromises made. And this is exactly what the analogy does. The analogy makes it perfectly understandable for the readers.
Which of the following monomers would be used to make the double helix of a DNA molecule?
The monomers that would be used to make the double helix of a DNA molecule are the phosphorus+ sugar+ base. The correct option is A.
What is DNA?DNA is a genetic material that is present in the nucleus of the cell. It is present in all plants and animals. This is the important material in the body that makes every individual unique.
DNA is made up of three substances. They are phosphorus sugar, which makes the backbone of the helix. The bases are present in between the helices, they are joined by hydrogen bonds.
There are two hydrogen bonds present between adenine and thymine. There are three hydrogen bonds present between guanine and cytosine. The bases keep the two helices together.
Thus, the correct option is A, phosphorus+ sugar+ base.
To learn more about DNA, refer to the below link:
https://brainly.com/question/22499464
#SPJ5
PLZ!!!! HURRY!!!!!
30 POINTS!!!!!!!!!!!!!!!!!!!!!!!!
Which of the following statements does not refer to how psychotherapy is helpful to an individual who seeks treatment? A. It teaches the patient new ways to deal with difficult situations or stress. B. It can be used to help people discover new ways to overcome difficulties. C. It can be comforting just to have someone to vent to. D. It allows therapists to use several techniques in treatment.
Answer:
allows therapists to use several techniques in treatment. - D.
Answer:
D, now your almost 1/5th of a century (20), if the only thing your good at is fortnite you probably want to start doing something with your sorry life...
*cough*
Explanation:
Why does diffusion not require any energy?
A. Random particle movement allows molecules to move from an area.
B. Molecules are moving from a lower to higher concentration.
C. The higher temperatures of the membrane "jump starts" diffusion.
D. Cells only use energy to move substances across the membrane.
Final answer:
Diffusion is an energy-free process because molecules naturally move down their concentration gradient due to their kinetic energy, ultimately leading to dynamic equilibrium.
Explanation:
Diffusion does not require energy because it is a passive process where molecules move from an area of higher concentration to an area of lower concentration. This movement is driven by the inherent kinetic energy of molecules and occurs until there is no net movement of molecules, a state known as dynamic equilibrium. Factors like temperature can influence the rate of diffusion, with higher temperatures increasing the rate as molecules move more quickly.
Final answer:
Diffusion is an energy-free process where molecules spread out from higher to lower concentration areas due to kinetic energy, moving down the concentration gradient in passive transport.
Explanation:
Diffusion does not require any energy because it is driven by the kinetic energy that is inherent to all molecules and atoms due to their constant random motion. This movement is a result of the molecules spreading out from an area of higher concentration to one of lower concentration to reach equilibrium, a process known as moving down the concentration gradient. This form of movement, where molecules spread out evenly without the use of energy, is known as passive transport. Molecules continue to move randomly after reaching dynamic equilibrium, but there is no net movement from one area to another as concentrations are equal.