Answer:
690?
Explanation: Hopes this helps!
Answer:
690
Explanation:
ape x
Research has found that declines in the dopaminergic system are related to declines in memory and tasks.
Yes, It is proven by multiple researches that declines in the dopaminergic system are related to declines in memory and tasks.
According to studies (Wang et al., 1998; Bäckman et al., 2000; Mozley et al., 2001; Erixon-Lindroth et al., 2005), healthy ageing is accompanied by noticeable decreases in a number of brain dopamine system components. Individual variations in dopamine have a significant impact on executive functions, particularly cognitive flexibility, even in healthy young people (Cools et al., 2008; Stelzel et al., 2010; Samanez-Larkin et al., 2013). Dopamine is therefore a key target for research into the neurochemical causes of variation in executive function in young people and may be a major factor in the development of significant individual differences in cognitive ageing. However, because to the difficulties in determining endogenous dopamine function, these interactions are seldom directly investigated in humans.
In the current investigation, the ability to synthesise dopamine was assessed using the PET tracer 6-[18F]fluoro-l-m-tyrosine (FMT), and its associations with ageing, cognitive flexibility, and frontoparietal activation during a task switching fMRI study were investigated. Task switching, an experimental paradigm demanding quick behavioural adaptation to shifting task requirements, is a well-known indicator of cognitive flexibility that is responsive to dopamine levels in the brain (e.g., Samanez-Larkin et al., 2013). For a review, see Klanker et al. (2013). Previous task switching studies have implicated the dorsal striatum, and more specifically the dorsal caudate nucleus (DCA), which receives abundant dopaminergic input and is highly connected to the cortex via established cortico-striato-thalamo-cortical loops (Alexander et al., 1986).
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Yes, some studies have shown that a decline in the dopaminergic system is associated with poorer memory and work performance.
For example, dopamine function declines throughout life, and this decline correlates with age-related cognitive impairment.
Dopamine is a neurotransmitter that promotes feelings of pleasure and reward and supports memory, attention, and more. As we age, an enzyme called monoamine oxidase B (MAO-B) becomes more active, breaking down dopamine and lowering levels.
Low dopamine levels are associated with Parkinson's disease, restless leg syndrome, and depression. Low dopamine levels can make you feel tired, cranky, unmotivated, and many other symptoms.There are treatments for many symptoms associated with low dopamine levels.
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Prove the Flood as written in Genesis through the use of scientific evidence - example, rock formations.
The basic tenet of the flood geology idea is that all the fossils were buried during the biblical flood of Noah, which occurred thousands of years ago, within a year.
What is Flood geology?The Institute for Creation Research (ICR) maintains that God uses miracles very sparingly; after He finished using a few miracles to get the Flood going, He let it operate in accordance with natural laws to produce the geological features that are now visible in the earth's crust. This theory acknowledges every miracle that is specifically mentioned in the Biblical Flood story. Insofar as this portion of their flood geology hypothesis is naturalistic, it qualifies as a scientific theory deserving of a scientific analysis because it aims to explain the structure of the rocks in the crust.Following is how the Biblical Flood is explained by the ICR Flood Geology Theory: Before the Flood, the planet was a tropical paradise due to a "canopy" of water vapor in the upper atmosphere that produced a greenhouse effect. The plains were lower and more expansive than they are now, and the oceans were shallower. There was no wind, no rain, only a mist that moistened the soil every day since the greenhouse effect kept temperatures uniformly high around the planet. The earth contained enormous subsurface water reservoirs.To Learn more About Flood geology, Refer To:
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Which of these time intervals, based on plant fossils, came last (most recently)? A) extensive growth of gymnosperm forests B) Silurian-Devonian explosion with fossils of plant lineages that contain most of the major morphological innovations C) colonization of land by early liverworts and mosses D) rise and diversification of angiosperms E) carboniferous swamps with giant horsetails and lycophytes
C) colonization of land by early liverworts and mosses .These time intervals, based on plant fossils, came last (most recently).
Colonization, often known as colonialism, is the term used to describe large-scale population movements in which immigrants maintain strong ties to the nation of their birth or the nation of their ancestors and, as a result, gain major advantages over other natives. The term "settler colonialism" refers to colonization that takes place with the protection of colonial structures. In many cases, this comprises the settlers evicting native residents or establishing legal and other frameworks that systematically disadvantage them. Colonization is the process of establishing foreign control over a particular land or peoples for agricultural objectives, typically through the establishment of colonies and possibly through the settlement of these peoples. In colonies established by Western European nations in the Americas, Australia, and Africa, settlers eventually formed a sizeable majority (added to by Central European, Eastern European, Asian, and African people).
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How is the PCR product separated from the PCR mixture at the completion of the reaction? A. Perform electrophoresis in an agarose gel, stain the gel and cut the band corresponding to the PCR product from the gel. B. Pour the PCR mixture into a commercially prepared DNA microconcentrator column and follow the manufacturer's directions to adhere and elute the PCR product from the column. C. Both of the above procedures may be used. D. Neither of the above procedures may be used.
The two suggested processes such as gel electrophoresis and micro concentrator column are applied. Therefore, choice C is right.
A specific piece of DNA can be quickly produced (amplified) in millions or billions of copies using the polymerase chain reaction, or PCR. It uses visual approaches based on size and charge to detect and identify gene sequences. The products of PCR are nothing but billion and millions of copies of target DNA or gene.
These genes are visualized by two techniques. One technique is agarose gel electrophoresis and another technique is the use of a micro concentrator column.
In agarose gel electrophoresis, the DNA samples are prepared and poured into the well. Then, they are separated based on size and charge using an electric field. Negatively charged DNA strands run toward the positive electrode and the smaller fragments run faster. In the micro concentrator column, the PCR products are poured according to the manual description and purified.
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Which of the following correctly matches an organic polymer with its monomers, respectively?
a. Protein: amino acids b. Lipid: steroids c. DNA ATP d. Carbohydrate: polysaccharides
The long amino acid chains that make up proteins. Your body has a huge variety of proteins, each of which has a crucial function. A protein's amino acid composition varies from one another.
What number of amino acids make up a protein?Both animal and plant proteins are made up of about 20 different natural amino acids. With the exception of gelatin, all ingestible proteins include some of all of these amino acids, however the precise proportions vary depending just on protein in question.
What does the term "complete protein" mean?If the protein you ingest contains each of the nine distinct kinds of amino acids, it is referred to it as "complete protein." There are many of complete proteins in: poultry such as chicken, ducks, or turkey; and fish. Eggs. Items classified as dairy include milk, yoghurt, & cheese.
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Describe the steps to identify the type of mutation that is caused by sickle cell.
Use the example below to explain your answer:
Normal DNA: TGA GGT CTC CTC
Sickle Cell DNA: TGA GGT CAC CTC
Answer:
frequent sickness easily getting sick and coughing all the time
would you rather do what pleases you or what intrigues you
Answer: both
Explanation: PASIKTAN
I would say that doing what intrigues me is more appealing as it offers a chance for growth and learning, leading to a constant improvement of myself.
Intrigue is defined as a feeling of curiosity or interest in something. It sparks a desire to know more and to understand something that is not fully known. On the other hand, pleasing oneself refers to fulfilling personal desires or wants.
While both options can lead to temporary satisfaction, doing what intrigues me would provide a more long-lasting sense of fulfillment and purpose, as it involves constantly expanding one's knowledge and abilities. It also has the potential to lead to new and unexpected discoveries and developments, whereas doing what pleases one may become monotonous over time.
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sort the following items into the bins according to their effect on blood pressure.
• Decrease water reabsorption Decrease peripheral resistance
• Vasodilation
• Increase peripheral resistance Increase salt intake
• Decrease salt intake
• Increase blood volume
• Decrease blood volume
• Increase water reabsorption
• Vasoconstriction
Decrease water reabsorption, Vasodilation, decreased salt intake, Decrease blood volume, and Vasoconstriction would all fall into the bin of "Decrease blood pressure".
Increase peripheral resistance, Increase salt intake, Increase blood volume, and Increase water reabsorption would fall into the bin of "Increase blood pressure".
Vasodilation and Vasoconstriction are opposite effects on blood vessels, Vasodilation dilates or widens the blood vessels and Vasoconstriction constricts or narrows the blood vessels, these both have an effect on blood pressure depending on the situation.
It's important to note that these are general effects on blood pressure and it's not a fixed rule, there are many other factors that can affect blood pressure such as age, genetics, diet, and physical activity among others. Also, these are physiological effects and may not be the same for every individual or in every specific situation.
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If you want a molecule that is highly polar, look for one that contains:Term
If you want a highly polar molecule, look for one that contains polar covalent bonds or polarizable groups such as N-H, O-H, F-H, and C=O. Additionally, asymmetry in the distribution of electrons in a molecule can also make it polar.
A polar molecule is one that has a positive and negative end, also known as a dipole.
The polarity of a molecule depends on the difference in electronegativity between the atoms making up the molecule. When two atoms have different electronegativities, the shared electrons will be pulled closer to the atom with the higher electronegativity, creating a partial positive charge on the other atom.
This creates a dipole moment and makes the molecule polar. To identify a highly polar molecule, look for polar covalent bonds or polarizable groups such as N-H, O-H, F-H, and C=O. Additionally, asymmetry in the distribution of electrons in a molecule can also make it polar.
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What qualitative effect would you expect each of the following to have on the P50 of hemoglobin?
- decrease in pH from 7.3 to 7.0
- decrease in pCO2 from 50 to 30 mm Hg
- removal of all BPG
A decrease in pH from 7.3 to 7.0 would increase P50, a decrease in pCO2 from 50 to 30 mm Hg would decrease P50, and the removal of all BPG would decrease P50 of hemoglobin.
A decrease in pH from 7.3 to 7.0 would have an increase in the P50 of hemoglobin. This is because a decrease in pH causes a shift in the equilibrium of the hemoglobin-oxygen binding reaction towards the left, meaning that hemoglobin will release more oxygen at a given partial pressure of oxygen.
A decrease in pCO2 from 50 to 30 mm Hg would have a decrease in the P50 of hemoglobin. This is because an increase in the partial pressure of carbon dioxide causes a shift in the equilibrium of the hemoglobin-carbon dioxide binding reaction towards the right, meaning that hemoglobin will bind more carbon dioxide at a given partial pressure of carbon dioxide.
Removal of all BPG (bisphosphoglycerate) would have a decrease in the P50 of hemoglobin. This is because BPG is a molecule that binds to the hemoglobin molecule and stabilizes the deoxyhemoglobin form. Without BPG, the hemoglobin will be less stable in the deoxyhemoglobin form and will release oxygen more readily at a lower partial pressure of oxygen.
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select the characteristics that affect the resilience of an ecological community.
Species evenness, Species Richness and Species diversity are the characteristics that affect the resilience of an ecological community. Thus, option a, b and d are correct.
Species evenness refers to how close in number each species is in an environment. It is mathematically defined as a diversity index, a measure of biodiversity that quantifies how equal the community is numerically.
The number of different species present in an ecological community, landscape, or region is referred to as species richness. Species richness is simply a count of species; it does not take into account the abundances of the species or their relative abundance distributions.
The number of different species represented in a given community (a dataset) is known as species diversity. The effective number of species is the number of equally abundant species required to achieve the same mean proportional species abundance as observed in the dataset of interest.
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Full question:-
Select the characteristics that affect the resilience of an ecological community.
a. species evenness
b. species richness
c. intraspecies competition
d. species diversity
e. decomposer species
In physical map the distance was measured by
The map provides a direct description of the chromosomal DNA molecule because the distances are measured in nucleotides. On physical maps, the separation between landmarks along a chromosome is specified.
What do you understand by a physical map?In the context of genomics, a physical map is a graphic representation of the actual positions of landmarks or markers (such as genes, variations, and other interesting DNA sequences) on a chromosome.
The genetic distance along the chromosomes is measured in centimorgans, often known as genetic map units (mu) [94]. In molecular biology, the physical map method is employed to determine the physical arrangement and separation of DNA base pairs using DNA markers.
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At a nearby lake, a couple of scientists want to approximately how many fish live in the lake. The scientists will use the Mark and Recapture Sampling method to estimate the size of the population.
First the scientists capture 35 fish in their nets. They Mark these fish with a tag, and release them back into the lake.
The scientists return the next day and Capture 30 more fish. 5 of these fish are the marked Recaptured fish from the previous day.
Use the Mark and Recapture equation to estimate the number of fish in the lake total.
Answer:
The Mark and Recapture equation used to estimate the number of fish in the lake is:
N = (C1 x C2) / R
Where:
N = estimated population size
C1 = number of fish captured in the first sample
C2 = number of fish captured in the second sample
R = number of fish recaptured in the second sample
Given the information provided, we can plug in the numbers:
N = (35 x 30) / 5
N = (1050) / 5
N = 210
So the estimated population size of fish in the lake is 210.
Can you guys help me to answer this:(
Answer: The answer is 480
Explanation: 10000-5000-3000=2000
2000-1400*=600
600-120**=480
*1400 is 70% i checked
**120 is 20% i checked
if that is incorrect then 200
2000-1800***=200
***1800 is 90% i checked
p.s sorry if it is confusing
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Natural selection is a mechanism that acts on individuals within a
population. Which is a result of the process of natural selection?
Select one:
Adverse changes to the environment become more frequent.
Genetic similarity within the population increases.
The reproductive rate of the population decreases.
The population as a whole is better adapted to the environment.
Answer:
The population as a whole is better adapted to the environment.
which of the following nutrients is digested only after it reaches the small intestine?
Fat is the nutrient which is digested only after it reaches the small intestine.
The stomach is where fat digestion starts.
The stomach has the ability to directly absorb some of the remnants of fat breakdown.
The pancreas and gallbladder release chemicals to continue the breakdown of the fat after it reaches the small intestine.
Fat-soluble vitamins, monoglycerides, glycerol and fatty acids are the end products of fat digestion.
As enzymes break down the fats in the small intestine, bile emulsifies them. In order to prepare for absorption across the intestinal wall, emulsification process inside the duodenum alongside hydrolysis and micellization.
The fats are taken up by intestinal cells. Fats are transported through the lymphatic system by long-chain fatty acids, which into a giant lipoprotein structure called a chylomicron.
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Which of the following choices is an example of an acquired trait?
a human is born with brown eyes
a dog’s ears are bandaged so that they stand upright and her tail is docked short
a horse is born with a light-colored mane
a cat is born with black and white fur
Answer:
both
Explanation:
u both acquire it from ur parents
part of ur family members can have brown eyes
dogs father may have a damaged hair
a horse u should know
ans a cat when ur mom is black and ur dad is white
hope this was helpful
which food chain will provide the most energy to the top level consumer
The first trophic level of the food chain has the most energy. This level contains the producers, which are all of the photosynthetic organisms. This includes plants and sometimes photosynthetic bacteria and protists.
Answer:
The food chain that will provide the most energy to the top level consumer will depend on the specific ecosystem in question.
Explanation: However, in general, food chains that involve multiple levels of consumers, such as those that include apex predators, will typically transfer more energy to the top level consumer than those that do not.Apex predators are at the top of the food chain and have few natural predators, allowing them to consume a large amount of energy from the organisms they prey on. An example of this would be a lion at the top of a food chain in the African savannah.
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Why is it helpful to study embryonic structures when determining
evolutionary relationships?
Select one:
All animals look the same as embryos.
All animals have completely different embryonic structures.
Embryos are not used to assign evolutionary relationships; only
adult organisms.
Animals with a shared ancestor may have similar characteristics
as embryos that disappear as adults.
Answer:
Embryology is important to understanding a species' evolution, since some homologous structures can be seen only in embryo development. For example, all vertebrate embryos, from humans to chickens to fish, have a tail during early development, even if that tail does not appear in the fully developed organism.
Explanation:
Which of the following enzymes does HIV use to synthesize DNA on an RNA template?
O RNA polymerase
O DNA convertase
O ligase
O reverse transcriptase
The correct choice is option 4. HIV use reverse transcriptase to synthesize DNA on an RNA template.
A vital early stage in the virus life cycle is the transcription of the viral RNA genome.
It is transcribed into double-stranded DNA in affected host cells, which is catalyzed by the HIV type 1 reverse transcriptase (RT) enzyme.
Two similar subunits, p66 and p51, combine to form the asymmetric heterodimer known as the HIV-1 RT.
Two copies of a single-stranded RNA genome are also present in the HIV-1 virion along with the viral proteins.
A DNA polymerase that can duplicate either a DNA or an RNA template, and an RNase H that only cleaves RNA when it is a component of an RNA/DNA duplex, are the two enzymes that make up RT.
To transform the RNA into double-stranded linear DNA, RT's two enzymatic activities, polymerase and RNase H, work together.
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The tiny space between the axon of one neuron and the dendrite or cell body of another is called the a. axon terminal. b. branching fiber. c. synaptic gap. d. threshold.
The tiny space between the axon of one neuron and the dendrite or cell body of another is called the synaptic gap . Correct option (c).
A synapse is a structure in the nervous system that allows a neuron (or nerve cell) to send an electrical or chemical signal to another neuron or the target effector cell.
Synapses are necessary for the transfer of nerve impulses from one neuron to the next. Neurons are specialized in sending messages to specific target cells, and synapses are the method by which they do so. The plasma membrane of the signal-passing neuron (the presynaptic neuron) comes into intimate contact with the membrane of the target (postsynaptic) cell at a synapse.
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Maxine Miles runs a marathon in 2 hours and 40 minutes. Most of the ATP for this activity is supplied by the process of ______ glucose breakdown.
Maxine Miles runs a marathon in 2 hours and 40 minutes. Most of the ATP for this activity is supplied by the process of aerobic glucose breakdown.
The metabolic processes through which aerobic cells make ATP by using the energy stored in the chemical bonds of meals (for example, glucose) and oxygen are referred to as cellular respiration.
Both cellular respiration (under anaerobic circumstances) and acid lactic fermentation can create ATP in muscle cells (anaerobic conditions).
Since cellular respiration is slower than fermentation and acid lactic fermentation is less effective than cellular respiration, muscle cells adopt this route when the body is running low on oxygen. Oxygen (O2) is needed for aerobic respiration in order to produce ATP. Although proteins, lipids, and carbs are eaten as reactants, the preferred route of pyruvate breakdown in glycolysis—aerobic respiration—requires pyruvate to be delivered to the mitochondria.
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Maxine Miles runs the marathon in 2 hours and 40 minutes. Most of her ATP for this activity is provided by the process of aerobic glucose breakdown or aerobic respiration
The metabolic process by which aerobic cells use the energy stored in chemical bonds between food (eg glucose) and oxygen to make ATP is called cellular respiration.
Both cellular respiration (under anaerobic conditions) and acid lactic acid fermentation can generate ATP in muscle cells (under anaerobic conditions).
Cellular respiration is slower than fermentation, and acid-lactic fermentation is less effective than cellular respiration, so when the body is low on oxygen, muscle cells follow this pathway. Oxygen (O2) is required for aerobic respiration to generate ATP. Proteins, lipids, and carbohydrates are consumed as reactants, but aerobic respiration, the preferred pathway for pyruvate breakdown in glycolysis, requires delivery of pyruvate to mitochondria.
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This stage of cellular respiration is responsible for most of the ATP synthesis.
a oxidation phosphorylation
b Glycolysis
c Pyruvate Oxidation
d Citric Acid Cycle
a. Oxidation phosphorylation (also known as the electron transport chain) is responsible for most of the ATP synthesis during cellular respiration.
In your body, when energy is released from the breakdown of a molecule such as glucose: a) adenosine monophosphate is created. b) adenosine diphosphate is created. c) some of the energy may be harnessed by building the unstable high-energy bonds that attach phosphate groups to ADP molecules. d) molecules of ATP are required to capture and absorb the heat generated by the reaction. e) all of the energy is lost as heat.
In our body, when energy is released from the breakdown of a molecule such as glucose then c) some of the energy may be harnessed by building the unstable high-energy bonds that attach phosphate groups to ADP molecules.
What is adenosine triphosphate or ATP?Adenosine triphosphate or ATP is a high energy molecule that is considered the energy coin of the cell generated by metabolism.
Therefore, with this data, we can see that adenosine triphosphate or ATP is a high energy molecule that is generated during metabolic reactions to carry out cell processes.
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Which of the following attributes does a line have?
Answer: It is stragiht the emilys back
Explanation: because
In microbiology, the term "growth" usually refers to which of the following?
A) an increase in a microbe's size B) an increase in the number of microbial cells C) an increase in the amount of ATP produced D) Both A and B are correct. E) A, B, and C are correct
In microbiology, the term "growth" usually refers to increasing the number of microbial cells.
Microbial growth refers to an increase in cell number, not an increase in cell size. Many microorganisms (Escherichia coli, Salmonella enterica, Listeria monocytogenes, etc.) are unicellular. In other words, it consists of only one cell.
Growth of multicellular organisms is usually measured as an increase in the size of a single microorganisms , whereas microbial growth is measured by an increase in population, by measuring an increase in cell number or an increase in total mass.
Microbial cells include molds, yeasts and bacteria, the latter being the most important from a health and safety standpoint. Microbial growth is affected by temperature, water activity (relative humidity of the meat), pH and nutrient concentration.
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Look at the graphic JPG List and describe 3 methods of jellyfish movement
50 POINTS!!! PLEASE HELP MEH
What united the cultures of North Africa and Southwest Asia?
Question 2 options:
A. democracy and capitalism
B. British and Spanish colonial rule
C. hieroglyphics and pharaoh worship
D. Arabic language and Islamic learning
Answer:
D. Arabic language and Islamic learning
Explanation:
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A genetics researcher finds that a form of human albinism in a certain population is controlled by the recessive allele, a, for the absence of skin pigment and the completely dominant allele, A, for presence of skin pigment. If the recessive allele occurs in 30% of this population, what percent of the population has skin pigment but also carries the recessive allele?
21 percent
42 percent
91 percent
51 percent
You must use the concept of the Hardy-Weinberg equilibrium,thus the option b 42percent is the right answer.
Define equilibrium?
Equilibrium is defined as a state of balance among both opposing forces or deeds that can be static (such as when forces are applied to a body and the resultant is zero) as well as dynamic (such as during a reversible chemical reaction. when the speeds in both directions are equal). This state can be either mental or emotional.
Is balance a part of equilibrium?
The forces are equalised if an entity is in equilibrium. The main word used to characterise equilibrium conditions is balanced.
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Why is it important to keep all variables except the experimental variable the same in an experiment?
None of these choices are correct.
If other variables change too, the effect of the experimental variable will be unclear.
O Experiments can become very expensive if multiple variables change.
OLaws state that scientists can only perform one experiment at a time.
The experiment's correlation between the dependent and independent variables may be invalidated if a control variable changes.
Why is it important to keep some variables constant in an experiment?Relies heavily on constant variables. Without these factors, drawing inferences would be challenging, we wouldn't have internal validity, and any results we did get would be somewhat ambiguous.
So that you can only observe the impact of the one variable (the independent variable) that you are trying to evaluate, all the other variables should be kept constant (you control them). Most experiments, like the one we used, involve more than one controlled variable.
With the exception of the independent variable, all conditions should be kept as equal as feasible between two participants using a controlled variable. This makes it possible for researchers to closely examine the impact the independent variable has on the dependent variable.
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