Answer:
Cell
Explanation:
DNA replication occurs in the nucleus in eukaryotic cells and in the nucleoid region of prokaryotic cells. Eukaryotic cells contain their DNA in the nucleus, and thus this is where DNA replication occurs.
A biologist is studying the composition of birds on a lake and counts 61 ducks, 17 geese, 11 cranes, 15 swans, and 6 herons. From previous studies performed around the same time of the year, she expects 50% of the birds to be ducks, 23% to be geese, 12% to be cranes, 10% to be swans, and 5% to be herons. What are the correct null and alternative hypotheses for performing a chi-square goodness of fit test? Select one.Question 1 options: Null Hypothesis H0 : The distribution of birds observed follows the Student’s t-distribution.Alternative Hypothesis H1: The distribution of birds observed does not follow the Student’s t-distribution. Null Hypothesis H0 : The distribution of birds observed does not follow the distribution from previous studies.Alternative Hypothesis H1: The distribution of birds observed follows the distribution from previous studies. Null Hypothesis H0 : The distribution of birds observed follows the Normal distribution.Alternative Hypothesis H1: The distribution of birds observed does not follow the Normal distribution. Null Hypothesis H0 : The distribution of birds observed follows the distribution from previous studies.Alternative Hypothesis H1: The distribution of birds observed does not follow the distribution from previous studies.
The observed distribution matches the distribution from earlier investigations, according to the null hypothesis H0.
H1 as an alternative: The observed distribution of birds does not match the distribution from earlier research.
What is null hypothesis?The null hypothesis states that there is no correlation between the variables and that they are all independent of one another. Any correlation between the variables is most likely the result of chance and sampling error.
For instance: Species A and B are independent of one another; there is no meaningful link between them. There is no correlation between Species A's location and Species B's location.
What is an alternative hypothesis?"There is a significant (positive or negative) correlation between the variables; the association between variables is probably not an attributable to chance or sampling error," is an alternative hypothesis.
For instance, there is a strong relationship between Species A and Species B; they are dependent on one another. It is either the case that Species A strongly associates with Species B or that they do not.
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occurs when . answer fermentation; oxygen is present anaerobic respiration; oxygen is present anaerobic respiration; oxygen is not present aerobic respiration; oxygen is not present i don't know yet
Fermentation is defined as yeasts and plants use anaerobic digestion to break down sugars into ethanol and carbon dioxide. Two ATP are generated, which are those produced during glycolysis.
What is fermentation? Through the activity of enzymes, fermentation is a metabolic process that results in chemical changes in organic substrates. It is specifically described in biochemistry as the process of obtaining energy from carbohydrates without the presence of oxygen.Different Fermentations are: Fermentation of Lactic Acid. Pyruvate, which is created during glycolysis, turns into lactic acid.Fermentation of alcohol. This is employed in the commercial manufacture of things like wine, beer, and biofuel.Fermentation of acetic acid. This procedure results in vinegar.Fermentation of butyric acid.For more information on fermentation kindly visit to
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True or False: the first cells were eukaryotic cells and are characterized by free floating dna and no nucleus or organelles .
The given statement is false because eukaryotic cell have no free floating DNA.
what is eukaryotic cell?Any cell or organism with a separate nucleus is referred to as an eukaryote. The nucleus, which houses the clearly delineated chromosomes, is encased in a nuclear membrane in eukaryotic cells. Organelles found in eukaryotic cells also include mitochondria, the Golgi apparatus (a secretory organelle), the golgi apparatus, and lysosomes. The lack of mitochondria and a nuclei in red blood cells, as well as the absence of mitochondria with in oxymonad species Monocercomonoides, are a few exceptions to this rule.
What distinguishes eukaryotic from prokaryotic organisms?The presence of a membrane-bound nucleus is the primary distinction between prokaryotes and eukaryotes. The difference between eukaryotes and prokaryotes' membrane-bound nuclei is perhaps most notable.
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The concerted model of cooperativity proposes:
a. The existence of multiple hybrid states of the enzyme
b. Inhibitors act to decrease the number of enzyme molecules in the R-state
c. All hybrid states of the enzyme bind ligand with equal strength
d. Negative cooperativity is the result of conformational changes in the enzyme induced upon ligand binding
apakah pandangan individu berkaitan perluasaan kuass barat ke tanah melayu
Answer: its d. cause i just took it
Explanation:
Juana accidentally touched a hot iron. She immediately drew back her hand. Which of the following is true about the withdrawal of her hand?
a.It was initiated in the motor cortex.
b.It was initiated in the spinal cord.
c.It was a voluntary behavior.
d.It was due to conscious instructions from the brain.
e.It was an operantly conditioned response.
Juana accidentally touches a hot iron. Juana immediately pulled back her hand when it accidentally touched the hot iron. Which of the following is true about the withdrawal of the hand is a. It starts in the motor cortex.
What is the motor cortex?the motor cortex allows the subject to form, maintain, and terminate voluntary and conscious movements.
The motor cortex is located in the upper and rostral parts of the brain, in the posterior portion of the frontal lobe, which lies just before the central or Rolando sulcus and the somatosensory areas. It is in this area that Penfield's motor homunculus is represented, a representation denoting parts of the cortex centered on the movement of certain muscles.
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How old was joe McNeil of the Greensboro four when they staged their sit in?
Assume that the length of wheat leaves is controlled by three loci, each with two alleles: L and I, Wand w, Hand h. Determine the differences in leaf length between two homozygous strains of wheat. Assume each allele contributes equally to the length of the plant leaves. One homozygous strain, Il ww hh, has leaves that are 100 mm in length, and the other strain, LL WW HH, has 220 mm leaves. The two homozygous strains are crossed, and the resulting F1 are selfed to produce F2 progeny. What length will the leaves of the ll WW HH genotype plant be? Number 180 What proportion of the F2 progeny will have the same phenotype as the II WW HH genotype? Incorrect The proportion of F2 progeny that have the same phenotype as the II WW HH genotype will have the same number of dominant alleles. Draw a Punnett square to determine the total number of genotypes that share the same number of dominant alleles as II WW HH Number
The expression of a characteristic that depends on the contribution of each of the alleles involved in the interaction is referred to as quantitative heritability. A phenotype is expressed by the interaction of many genes. 1) 140 mm / 2) 0.2344
What is Quantitative heritability?Quantitative heritability refers to the transmission of phenotypic traits whose expression is influenced by the combinatorial action of several genes.
The expression of the characteristic is controlled by the interaction of many genes. Additionally, there may be more than two alleles in these genes.
Genotypic graduation is brought about by the interaction of numerous genes and alleles, which can result in a wide variety of combinations.
You can quantify traits like longitude, weight, and the number of eggs laid by each female.
These characters do not categorize people into distinct and distinct groups. Instead, they divide people into numerous categories based on how the genes interacted and were dispersed during meiosis.
The outcome is determined by how much each allele contributes to the genotype and phenotype at the end. Depending on their level of contribution, they interact and produce a range of phenotypes.
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indicate whether the following statement is true or false. overall, buffer capacity increases as the relative concentrations of the buffer components become closer to each other
True, Overall, as the relative concentrations of a buffer components approach one another, buffer capacity rises.
What is buffer capacity?
By adding a little amount of acid or base to the buffer solution, the solution can resist significant variations in pH.
When H+ and space OH- are introduced to buffer solutions, buffer capacity() is defined as a quantitative measure of the resistance to pH change.
Alkalinity capacity or acid neutralising capability are other names for it.
Additionally, it is defined as the quantity of moles or grammes equivalent of an acid or a base needed to raise the pH of a solution by 1. It is based on the solution's concentration.
As absolute concentrations of the buffer's component parts rise, the buffer's capacity rises as well. The buffer's capacity increases with the concentration of the conjugate base and weak acid that make up the buffer.
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Cross a colorblind male with a carrier female what are the genotype and phenotype possibilities for their offspring
The genotype and phenotype possibilities for a colorblind male with a carrier female offspring is: XcXc, XY, XcX, XcY.
How will you identify ?
colorblind male X carrier female
XcY XcX
| |
XcXc , XY , XcY , XcY
What type of genotype does a colorblind male have?The sole X chromosome that males inherit from their mother is. They will suffer red-green color blindness if that X chromosome carries the red-green color blindness gene rather than a normal X chromosome. Two X chromosomes, one from the mother and one from the father, are present in females.
What does color blindness phenotypic entail?Red-green color blindness has a wide range of phenotypes. The OPN1SW gene on chromosome 7 is the site of mutations that cause blue color blindness (tritanopia; 190900). To describe the kind and nature of the cone deficiencies, one can use ERG flicker responses.
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The __________ function(s) to assist with planning, organizing, and coordinating motor movements and posture.
1. basal nuclei
2. spinocerebellum
3. cerebrocerbellum
4. vestibulocerebellum
The basal nuclei functions to assist with planning, organizing, and coordinating motor movements and posture.
Basal nuclei, sometimes also called basal ganglia, are a group of subcortical nuclei in the brains of vertebrates. It's located at the base of the forebrain and on top of the midbrain. The basal nuclei are interconnected with various other brain areas, such as the thalamus, cerebral cortex, and brainstem.
The main function of basal nuclei is the control of voluntary motor movement. It also controls learning (procedural, habit, and conditional), eye movements, emotion, and cognition.
Attached below is an illustration that shows the anatomy of the basal nuclei.
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Which of these needs to be done before the drug is made available to the general public
The needs which has to be done before the drug is made available to the general public is to ensure it has a high efficacy and it is safe for use which is denoted as option B.
What is a Drug?This is also referred to as medication and it comprises of chemical substances which are used to treat different types of sickness or illness and it is also based on its active ingredients.
There are different types of thorough researches done when a drug is being formulated so as to arrive at the best possible results and an example is testing its efficacy so as to ensure that the drug treats the disease efficiently.
Another thing which needs to be done is to test its safety so as to ensure that there are no serious side effects when an individual ingests the drug into the body system.
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The options are:
Drying and ColoringSafety and efficacyStorage and packaginginflection refers to the question 4 options: changes in the pitch of a speaker's voice dialect of a speaker speed at which a person speaks loudness or softness of a speaker's voice
is the pitch of a speaker's voice, either high or low. Inflections are changes in pitch.
What does communication voice inflection mean?
Noun. inflection in-flek-shn.: change in pitch or loudness of voice.: change in form that words go through to mark distinctions like those of case, gender, number, tense, person, mood, or voice.
What are vocal variation and inflection?
Vocal variety refers to a speaker's voice inflection; in other words, it's the adjustments made to modify the pitch and tone of speech. Vocal variation is a crucial presentation skill for presenters since it allows you to communicate your tale through your voice.
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list the four main categories of spinal nerves
The cervical, thoracic, lumbar, and sacral regions are the four divisions of the spinal cord.
The 31 pairs of spinal nerves are located where?The cervical, thoracic, lumbar, sacral, and coccygeal levels of the spine each have 31 pairs of spinal nerves: cervical nerves in 8 pairs (C1-C8). Thoracic nerves come in 12 pairs (T1-T12). five sets of lumbar nerves (L1-L5). There are 31 pairings in humans: 1 coccygeal, 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 5 sacral. Each pair joins a certain part of the body to the spinal cord. Each spinal nerve splits into two roots close to the spinal cord.
What are spinal nerves and what do they do?Between your brain, spinal cord, and the rest of your body, your spinal nerves transmit electrical messages. You may move your body and perceive feelings thanks to these electrical nerve signals (sensory nerve) (motor nerves).
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If you could see the stomata on the leaves of a plant on a hot, dry day,
would they be open or closed? Why? Use the terms transpiration and
turgidity correctly in your response. Write your answer in
complete sentences.
Answer:For the answer, I put down,
If you could see the stomata on the leaves of a plant on a hot, dry day, it would be closed because when the outside weather or temperature is warm or hot, the water could and will evaporate more readily, and because of that, the plants close their stomata to prevent any excessive water loss from their leaves. The hot/warm air around the leaves of a plant is affected by the temperature of the air around it. So, if the temperature in the air is higher then regular temperature for the plant, the water from the leaves will diffuse more into the air, which can and/or is very bad to the plant.
Explanation:There you go.
in the dna extraction procedure, the purpose of the sodium perchlorate was to , and the purpose of the ice-cold ethanol was to .
The answer is sodium perchlorate is used as an alternative to phenol extraction.
What is DNA extraction?
Deoxyribonucleic acid (DNA) is extracted from the cells or viruses where it ordinarily lives.
Why it is used for?
In many diagnostic procedures, DNA extraction is frequently the first step. These procedures are used to diagnose diseases and genetic problems as well as to find germs and viruses in the environment.
DNA has been extracted from crude lysates of yeast, a number of bacterial species, and bacteriophages using sodium perchlorate, sodium dodecyl sulfate, and chloroform as an alternative to phenol extraction.
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Solve this pleaseeee
The correct order which denotes a reflex action is: Pain Receptors → Sensory neuron → Spinal cord → Motor neuron → Effector muscles. This results into sudden involuntary response to stimuli.
What is a reflex action?
A Reflex action can be defined as the sudden involuntary response to an external stimuli. Reflex action helps an organism to quickly adapt to the adverse conditions that could have the potential to cause harm to the body or even death of a person. An example of reflex action is pulling our hands away immediately after touching or coming in contact with a hot or cold object.
A reflex action can be described in a proper order through the following steps which include: External Stimulus → Receptor organ such as Pain receptor → Afferent nerve fiber (Sensory Neuron) → Central Nervous system (Spinal cord) → Efferent nerve fiber (Effector Muscle) → Response.
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what i. Growth of body tissues is the result of:
A. Mutualism B. Meiosis C. Metamorphosis D. Mitosis
s geography?
FILL IN THE BLANK. Various procedures can be used to detect genetic disorders before birth. Among the tests discussed in the chapter, __ is the least invasive, while __ and __ allow the chromosomes of the fetus to be examined.
Various procedures can be used to detect genetic disorders before birth. Among the tests discussed in the chapter, ultrasound imaging is the least invasive, while chorionic villus sampling and amniocentesis allow the chromosomes of the fetus to be examined.
Amniocentesis is an examination of the baby's chromosomal abnormalities by taking a sample of the amniotic fluid. This examination can be done when the gestational age has reached around 15-20 weeks. Amniocentesis can be done to detect various types of chromosomal abnormalities, such as Turner syndrome.
Chorionic villus sampling (CVS) is carried out by taking samples of chorionic villus cells that are identical to fetal cells using a special needle. This procedure is carried out with the help of ultrasound. Usually, this test is done early in pregnancy, namely the 10th to 13th week. This test can also be done to detect genetic abnormalities in the fetus. CVS results are usually quicker than other tests, giving you more time to decide on pregnancy.
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a. Design a meal that uses four different types of plant foods, two different types of animal foods, and one food that relies on fungi, algae, or bacteria. How does the management of natural resources determine whether your meal will be available?
A meal that uses four different types of plant foods, two different types of animal foods, and one food that relies on fungi, algae, or bacteria is the pizza.
What is a meal?We define a meal as any food that has been produced for human consumption. We can see that there are many kinds of meal that we produce and the meals that we eat are either of plant or animal origin. It is usual that we do prepare our meals in such a way that the mean would contain all the six classes of food.
In this case, we are asked to be able to design a meal that uses four different types of plant foods, two different types of animal foods, and one food that relies on fungi, algae, or bacteria.
The meal that can be able to be composed of all the afore mentioned is the pizza. You would need both chicken and vegetables in the preparation of pizza as well as a bit of yeast.
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Which of the following is Not a domain of evaluation for assessing intellectual disability
The option that does not represent a domain of evaluation for assessing intellectual disability is the conceptual domain. Thus, the correct option for this question is A.
What is Intellectual disability?Intellectual disability may be defined as a type of diagnosis that is significant given when an individual has problems both in intellectual functioning and the ability to function in everyday activities.
There are three major criteria for intellectual disability. It includes significant limitations in intellectual functioning, significant limitations in adaptive behavior, and onset before the age of 18. While the rest three domains which are social, practical, and moral domains encompass adaptive functioning.
Therefore, the correct option for this question is A.
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Changes in DNA structure during the cell cycle As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division, the structure of the chromosomes changes. Answer the three questions for each phase of the cell cycle by dragging the yes and no labels to the appropriate locations in the table. Note: Assume that by the end of the M phase, the parent cell has not yet divided to form two daughter cells.
Changes in DNA structure during the cell cycle: Sister chromatids form when DNA replicates in the S phase.
What is cell cycle?
A cell's growth and division are accompanied by a sequence of processes known as a cell cycle. A cell spends the majority of its time in what is known as interphase, where it develops, duplicates its chromosomes, and gets ready to divide. The cell then exits interphase, goes through mitosis, and finishes dividing. Each of the resultant cells, referred to as daughter cells, enters its own interphase to start a fresh cycle of the cell.
S phase:
Between G1 phase and G2 phase, the cell cycle's S phase (also known as the "synthesis phase") is when DNA replication occurs. The mechanisms that take place during S-phase are strictly controlled and highly conserved because correct genome duplication is essential for proper cell division.
Hence, Sister chromatids form when DNA replicate in the S phase.
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The lowest frequency _____ is a radio wave.
a. electromagnetic spectrum
b. electromagnetic wave
c. radiation
Answer: I think its Electromagnetic Spectrum I think
Explanation: .
Answer: A.
electromagnetic spectrum
Explanation:
When understanding evolutionary forces, the effect that they have on a population is key in determining their significance in genetic variation. Which of these pairs act in synergy with one another to increase diversity within populations?
Migration and mutation work together to broaden the diversity of populations.
What does genetic variation mean?Genetic variation is a variance in DNA sequences among members of a population. Sperm and egg cells, as well as somatic and germ cells, all exhibit variation. Recombination and mutation both result in variations.
What role does genetic variation play?Some animals in a group can survive in their environment more successfully than others thanks to genetic variety. Even among members of a small population, the degree to which an organism is adapted to a given environment might vary noticeably.
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What are the adaptive advantages of bipedalism?
Answer: Bipedalism allowed hominids to free their arms completely, enabling them to make and use tools efficiently, stretch for fruit in trees and use their hands for social display and communication.
Explanation:
The exchange of genetic material between homologous
chromosomes that can occur during meiosis. Portions of
chromatids may break off and attach to adjacent chromatids
on the homologous chromosome.
Recombination is the term for the exchange of genetic material between homologous chromosomes. Chromosomes can split into pieces that attach to neighboring chromatids on the homologous chromosome.
What is the process by which homologous genetic information is shared known as?Recombination happens when two DNA molecules trade genetic material with one another. When homologous chromosomes align in pairs and exchange DNA segments during prophase I of meiosis, one of the most notable instances of recombination occurs.
Which of the following meiotic processes contributes to the creation and maintenance of genetic diversity in natural populations?In recombination, the chromosomal pairs align and unite again such that each chromosome contains a portion of the next one. Genetic variety is guaranteed in this way. In order to make four haploid daughter cells that aren't identical to either their diploid parent cell or to one another, meiosis employs recombination.
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A phylogenetic tree showing the relationships among ten phyla of bilaterian animals is shown below.Label each branch with a C, P, or A, depending on whether members of the phylum are coelomates (C), pseudocoelomates (P), or acoelomates (A). Labels may be used once, more than once, or not at all.
The bodily cavity formed from the mesoderm is called a coelom.
Body cavities
Cells fill the body cavities of organisms known as acoelomates, which lack a coelom. Organisms known as pseudocoelomates have the beginnings of coelom but lack the peritoneum. In coelomates, all organs are enclosed by a real body cavity and peritoneum.
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conclusion: comparison of clam to earthworm complete 17.2 to compare the anatomy of a clam to that of an earthworm.
Comparison of clam to earthworm
Earthworm
Habitat: SoilFeeding mode: swallowSkeleton: without a skeletonSegmentation: 100 – 150 segmentsCirculations: closed circulationRespiratory organ: skinLocomotion: setae (muscle)Reproductive organs: cliitellumClam
Habitat: freshwaterFeeding mode: ciliaSkeleton: exoskeletonSegmentation: lack of segmentsCirculations: open circulationRespiratory organ: GillLocomotion: flat feetReproductive organs: eggs and spermClam is marine/water animals, including soft-bodied animals (mollusks) with shells as body protectors. Clam has no head (and brain) and only scallops have eyes. Organs owned are the kidneys, heart, mouth, and anus. The clam can move with "legs" as a flat organ removed from the shell at any time or by opening and closing the shell violently.
Earthworms are members of the Annelida phylum, having the following characteristics: Segmented body. It has a cliitellum (a part of the body whose segments are fused) which is a means of reproduction.
this question is in the form of a table (see the picture)
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neurovascular dysfunction in grn-associated frontotemporal dementia identified by single-nucleus rna sequencing of human cerebral cortex
The statement "Neurovascular dysfunction in GRN-associated frontotemporal dementia identified by single-nucleus RNA sequencing of human cerebral cortex" is true.
What is neurovascular dysfunction?Neurovаsculаr or cerebrovаsculаr diseаse refers to аll disorders in which аn аreа of the brаin is temporаrily or permаnently аffected by bleeding or restricted blood flow. Restrictions in blood flow mаy occur from vessel nаrrowing (stenosis), clot formаtion (thrombosis), blockаge (embolism), or blood vessel rupture (hemorrhаge).
What is frontotemporal dementia?
Frontotemporal dementia (FTD) is а complex neurodegenerаtive disorder chаrаcterized by neuronаl loss in frontаl аnd temporаl lobes leаding to loss of cognitive, sociаl, аnd emotionаl аbilities. Heterozygous mutаtions in progrаnulin (GRN) generаlly result in reduced protein levels of progrаnulin аnd аre аmong the most common genetic cаuses of FTD (FTD-GRN).
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(i) after the initial centroids are assigned (shown above), the first step in a clustering process is to check the rest of the points and assign them to one of the two clusters. here we assume that the centroid remain unchanged during the first round (iteration). determine cluster memberships (which points belong to cluster 1 and which belong to cluster 2) for each of these 7 points after the first iteration. show intermediate results how you obtain the solution
1. Below is a list of the first iteration's results. Eucledian distance is used to compute the distance.
Iteration 1 Cluster 1 Cluster 2
x y 1.0 1.0 5.0 7.0 Cluster
1.0 1.0 0.00 7.21 1
1.5 2.0 1.12 6.10 1
3.0 4.0 3.61 3.61 2
5.0 7.0 7.21 0.00 2
3.5 5.0 4.72 2.50 2
4.5 5.0 5.32 2.06 2
3.5 4.5 4.30 2.92 2
Distance from (1.0, 1.0) to Cluster center C1(1.0, 1.0)=0
Distance from (1.0, 1.0) to Cluster center C2(5.0, 7.0) is calculated as
SQRT((5.0-1.0)2 +(7.0-1.0)2) = 16+36=SQRT(52)=7.21.
The distances between each point and the two cluster centers C1 and C2 are also displayed below.
After iteration 1,
Cluster C1={(1.0,1.0), (1.5,2.0)}
Cluster C2={(3.0,4.0), (5.0,7.0), (3.5,5.0), (4.5,5.0), (3.5,4.5)}
2. Based on iteration 1, the mean vale of centroids is recalculated as follows.
x of C1= (1+1.5)/2 = 1.25
y of C1= (1+2)/2 = 1.5
x of C2 = (3+5+3.5+4.5+3.5)/5 = 3.9
y of C2=(4+7+5+5+4.5)/5 = 5.1
Centroids of the cluster are C1 (1.25, 1.5) and C2 (3.9,5.1). Following is a calculation and explanation of the separation between each point and these two new cluster centroids.
Iteration 2 Cluster 1 Cluster 2
x y 1.25 1.5 3.9 5.1 Cluster
1.0 1.0 0.56 5.02 1
1.5 2.0 0.56 3.92 1
3.0 4.0 3.05 1.42 2
5.0 7.0 6.66 2.20 2
3.5 5.0 4.16 0.41 2
4.5 5.0 4.78 0.61 2
3.5 4.5 3.75 0.72 2
The components of the Clusters have not changed after iteration 2 has ended.
3) The Cluster centers have not changed, hence iteration 3's outcomes will be identical to iteration 2's. If we perform additional iterations, the clusters won't alter at all. In two successive runs, the K- means method converges with the same clusters.
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Which of the following is an
ADVANTAGE of using natural gas
for energy?
A. unburned methane can escape to atmosphere
B. can leak or spill during transport
C. burns cleaner than coal
D. increased fracking leads to increased
earthquakes
it's option 3 burns cleaner than coal