Answer:
b
Explanation:
A controlled experiment
is repeated many times to ensure that the results are accurate
includes one group for which the scientist controls all variables
includes at least two groups, one of which does not receive the experimental treatment
includes at least two groups, one differing from the other by two or more variables
A controlled experiment is a scientific test that compares two or more groups that are kept the same except for one factor that is changed or altered. This factor is the independent variable, and its effects on the system being studied are measured. A controlled experiment uses controls, usually separating the subjects into an experimental group and a control group. The experimental group is exposed to the independent variable, while the control group is not. A controlled experiment allows researchers to determine cause and effect between variables.
According to this definition, the answer to your question is: A controlled experiment includes at least two groups, one of which does not receive the experimental treatment. This option matches the description of a control group and an experimental group in a controlled experiment.
PLS HELP FAST NO LINKS!
What is formed because the Sun heats some areas of the earth more than others?
A.precipitation
B.clouds
C.air fronts
D.air pressure
63 points NEED HELP
Catalase is an enzyme that breaks down hydrogen peroxide (H 2O 2) into water and oxygen. A student conducted an investigation to study the effect of catalase concentration. The volume of oxygen released during the reaction was measured by the amount of water displaced in a graduated cylinder. The table below shows the results for the five samples. I WILL GIVE BRAINLIEST
According to the data, which graph best represents the effect of catalase concentration?
NOT A TEST ITS A HOMEWORK ASSIGNMENT THAT IS WORTH A TEST GRADE
^ for moderators since I've had 4 questions deleted
Answer:
The second graph with 3 point going straight across on 14
Explanation:
Answer:
Its the second graph
Explanation:
30. An anatomist wishes to make detailed comparisons of
medial surfaces of the left and right sides of the brain. This
work requires sections that show the entire medial surface.
Which kind of sections should be ordered from the lab for
this investigation?
Answer and Explanation: In anatomy, bodies are divided by hypothetical geometric planes to describe location or direction of its structures. These planes are called Planes There are 3 reference planes:
1) Sagittal Plane divides the body into sinister and dexter (left and right) sides.
2) Coronal Plane divides into anterior and posterior portions.
3) Transverse Plane divides into superior and inferior portions.
For the anatomist, to have a section that shows the entire medial surface, should be ordered the Sagittal Plane, more especifically midsagittal (median) plane.
Which example is a biotic factor of a desert environment?
O coyote
O air temperature
O sand
Olight
Answer: its A: coyote
Explanation: Because its the only living thing on the list and a biotic factor has animals.
Below are the reduction half reactions for chemolithoautotrophic nitrification, where ammonia is a source of electrons and energy and oxygen is the terminal electron acceptor.
NO2- + 6e- -> NH4+ (+0.34 volts)
O2 + 4e- -> 2H2O (+0.82 volts)
Using the information given, calculate the ΔE for this reaction, balance the full reaction to determine the n, the number of electrons transferred when 440 moles of NH4+ are oxidized. Finally, use the simplified Nernst Equation
ΔG = -nFΔE, where F = 96.5 kJ (mol e- × V)-1
to determine the Gibbs Free energy available to do work!
Report your answer in kJ rounded to two decimal places.
The Gibbs free energy available to do work for the reaction is approximately -15,427.20 kJ, rounded to two decimal places.
To calculate the Gibbs free energy (ΔG) available to do work for the given reaction, we need to use the formula:
ΔG = -nFΔE
where ΔE is the potential difference, n is the number of electrons transferred, and F is the Faraday constant (96.5 kJ/(mol e- × V)).
First, let's calculate the ΔE for the reaction by subtracting the reduction potential of the anode (NH4+ to NO2-) from the reduction potential of the cathode (O2 to H2O):
ΔE = E(cathode) - E(anode)
= (+0.82 V) - (+0.34 V)
= +0.48 V
Next, we need to balance the full reaction to determine the number of electrons transferred (n) when 440 moles of NH4+ are oxidized. The balanced equation is as follows:
8NH4+ + 6O2 -> 8H2O + 6NO3- + 16H+
From the balanced equation, we can see that for every 8 moles of NH4+ oxidized, 6 moles of electrons are transferred.
So, the number of electrons transferred (n) when 440 moles of NH4+ are oxidized can be calculated as:
n = (6 mol e- / 8 mol NH4+) × 440 mol NH4+
= 330 mol e-
Therefore, when 440 moles of NH4+ are oxidized, 330 moles of electrons are transferred.
Now, let's substitute the values into the equation:
ΔG = -nFΔE
= -(330 mol e-) × (96.5 kJ/(mol e- × V)) × (+0.48 V)
Calculating this expression, we find:
ΔG ≈ -15,427.20 kJ
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Which 2 of the following are important nutrients that are at the bottom of
aquatic environments due to dead organisms that sunk and decomposed
there?*
Nitrogen
Phosphate
Helium
Mercury
Answer:
nitrogen..Nitrogen and phosphorus are essential plant nutrients found in aquatic ecosystems, however, in excess amounts, they can cause significant water quality problems. Nitrogen and phosphorous in water are typically found in the forms of nitrate and phosphate, respectively.
Using you own words, what is homeostasis , use the following terms in your explanation ,negative feedback , internal environment ,receptor , controller and effector.
The homeostasis is a state of balance of the functions and systems of the body. This process is regulate by the internal environment of the body and their responses to the external stimuli by the equilibrium of the functions and actions of the systems, organs, and cells of the individuals. The homeoatasis needs a constant feedback between the organic and inorganic needs of the organisms to survive the daily life, being the feedback possible because of receptors and effectors mechanisms, controlled by specific structures. The feedback can be either positive to increase the reaction, or negative to reduce that reaction, being the better form to maintain the balance of the body and homeostasis in general.
Example:
A simple example of a homeostatic process is the regulation of the blood pressure, because of a negative feedback loop. When there is a increase in blood pressure detected by the receptors in the blood vessels a message is sent to the brain, the brain in turn seds back a message to the effectors to the heart and blood vessels (that makes the heart rate decrease and the blood vessels dilate (increase their diameter)) causing the overall blood pressure to decrease.
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Imagine a cross between two individuals with various alleles of four unlinked genes: AaBbCCdd x AabbCcDd Figure out the probability of getting offspring with the dominant phenotype for all four traits. hint: both the product rule and the sum rule will be used to solve this problem
The probability of obtaining offspring with the dominant phenotype for all four traits (AaBbCCdd x AabbCcDd) is 0.046875, while the probability of obtaining offspring with the dominant phenotype for any of the four traits is 1.50.
Both the product rule and the sum rule are essential to understanding the concept of alleles and the probability of obtaining offspring with the dominant phenotype for four unlinked genes.The product rule states that the probability of obtaining two or more independent events is equal to the product of the probabilities of each event.
In this case, the probability of obtaining offspring with the dominant phenotype for all four traits is equal to the product of the probabilities of the dominant alleles in each gene. For example, the probability of obtaining offspring with the dominant phenotype of A, B, C, and D is equal to the product of the probabilities of A, B, C, and D (AaBbCCdd x AabbCcDd). This equals 0.25 x 0.375 x 0.5 x 0.375 = 0.046875.
The sum rule states that the probability of obtaining at least one of the two events is equal to the sum of the probabilities of each event. In this case, the probability of obtaining offspring with the dominant phenotype for any of the four traits is equal to the sum of the probabilities of the dominant alleles in each gene. For example, the probability of obtaining offspring with the dominant phenotype of A, B, C, and D is equal to the sum of the probabilities of A, B, C, and D (AaBbCCdd x AabbCcDd). This equals 0.25 + 0.375 + 0.5 + 0.375 = 1.50.
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3. What evidence was provided for localized functions inherent to specific anatomical brain structures during execution of behavior and mental processes?
Evidence from studies of brain lesions and neuroimaging techniques supports the concept of localized functions in specific brain structures during the execution of behavior and mental processes.
There is substantial evidence supporting the localized functions of specific anatomical brain structures during the execution of behavior and mental processes. One such piece of evidence is the study of patients with brain lesions. By observing the behavioral and cognitive deficits resulting from damage to specific brain regions, researchers have been able to identify the functions associated with those areas. For example, damage to the prefrontal cortex can lead to impaired decision-making and planning abilities. Additionally, neuroimaging techniques, such as functional magnetic resonance imaging (fMRI), have provided evidence for localized functions. These techniques allow researchers to observe changes in brain activity during specific tasks, providing insight into the regions involved in those tasks.For more questions on neuroimaging
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What is NOT one way mining can change the land?
A. Trees are planted.
B. Roads must be built to access the area
C. Trees must be cut down to clear land
One way mining cannot change the land is by not having any impact on the local ecosystem.
However, this is unlikely as mining activities often involve extensive modifications to the surrounding environment. One way that mining can change the land is by requiring the construction of roads to access the site.
These roads can fragment habitat, disrupt wildlife movement patterns, and lead to erosion and sedimentation of waterways. Additionally, mining can also require the removal of trees to clear land for operations,
which can have significant impacts on the local flora and fauna. The removal of trees can reduce habitat, increase soil erosion, and impact the local water cycle.
Therefore, mining activities can have significant impacts on the surrounding environment and require careful management to minimize these effects.
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] What are the 9 life-support systems on Earth?
On Earth, there are nine support systems that maintain life.
Air: A variety of gases, including oxygen, are present in the atmosphere and support life.Water: Since it is utilized for chemical reactions, hydration, and temperature regulation, water is crucial for maintaining life.Soil: Soil acts as a habitat for a range of microorganisms as well as a substrate for the growth and anchoring of plants.Nutrients: For the growth and survival of living things, essential minerals like potassium, phosphorus, and nitrogen are needed.Temperature: A vast variety of living things can thrive on Earth's climate, which also aids in regulating their metabolic processes.Light: In order for plants to produce energy through photosynthesis, light is required.Biodiversity: The variety of species on Earth perform a number of services and tasks that keep life possible, such as pollination, pest management, and nutrient cycling.Oceans: The oceans are essential for maintaining a stable climate, generating oxygen, and serving as a habitat for a wide variety of marine animals.Microorganisms: Through activities including decomposition, nutrient cycling, and waste treatment, microorganisms play a crucial role in preserving the harmony of life-support systems.These life-support systems are interdependent and interrelated, and modifications to one can have an effect on the others. To support life on Earth, it is crucial to keep these systems healthy and in balance.
Life is eternal and coeternal with matter, it first appeared on Earth at or shortly after its creation. A succession of developing chemical reactions led to the emergence of life on the early Earth.
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Can someone help me !
Which of the following statements describes processes that occur during DNA replication?
Answer:
What are the statements?
Explanation:
...
Will the trend toward an increased incidence of tusklessness in a population with heavy poaching lead to increased African elephant population sizes in the future?
No, the trend toward increased tusklessness in African elephants due to heavy poaching is not likely to lead to increased population sizes in the future.
While tuskless elephants may have a survival advantage in areas with high levels of poaching, this advantage is likely to be temporary. Over the long term, tusklessness may lead to reduced genetic diversity and reproductive success, as tusks play a role in mate selection and competition among males.
Additionally, tuskless elephants may be less able to defend themselves and their young against predators and may have a reduced ability to forage for food. Thus, while tusklessness may confer some immediate benefits in areas with high levels of poaching, it is not a viable long-term solution for elephant populations.
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13. It is strongly recommended that pesticides be applied by:
It is strongly recommended that pesticides be applied by competent professionals.
What are Pesticides?Pesticides are chemicals that are designed to get rid of pests.
Because these chemicals can be poisonous to other organisms in the environment, including humans, pesticides should be carefully applied.
Thus, it is strongly recommended that only those that are trained in the art of pesticide applications are called upon to apply the chemicals in the environment.
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Aerobic respiration takes place in the mitochondria because?
The________ theory believed personality included three components: ego, superego, and Id.
Answer: freud's psychoanalytic theory
How does scientists use information to make predictions in your own words and in a generalized manner?
Scientists create a broad principle or explanation to help anticipate future events using their understanding of past occurrences. The term "hypothesis" refers to the overall idea. Inductive reasoning is the category of reasoning that is involved (deriving a generalization from specific details).
How do scientist make predictions?A scientific prediction suggests the evidence that is in line with the hypothesis and can thus be used to the results of both current and previous experiments. As a result, even though these trials were carried out more than 200 years ago, we can make predictions about how they will turn out.
For the scientist, predictions serve as a point of reference. If predictions come true, the theory has been validated by the scientist. The hypothesis is disproved if the predictions are not confirmed. In either case, the scientist now has more understanding of the process being investigated.
Therefore, scientists create a broad principle or explanation to help anticipate future events using their understanding of past occurrences. The term "hypothesis" refers to the overall idea. Inductive reasoning is the category of reasoning that is involved (deriving a generalization from specific details).
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if you answer right I will give you the brainiest!!!!!
Luca sees snow melting from a roof as the sun comes out. Later he notices that the melting snow froze into icicles during the cold night. How is energy related to these changes of state?
Group of answer choices
Thermal energy affects the difference in freezing points.
Thermal energy is absorbed during melting and then is released as it freezes.
The amount of thermal energy absorbed is affected by low melting points.
Thermal energy flows from cold objects to hot objects as they freeze.
Answer:
The second one
Explanation:
The rest don’t really make sense in This case
A neurotransmitter from a presynaptic neuron causes an inhibitory postsynaptic signal (IPSP) in the postysynaptic neuron. Which if the following events will occur FIRST1Sodium-gated ligand channels open2Potassium ligand-gated channels open3An action potential is initiated in the postsynaptic neuron4The postsynaptic neuron will hyperpolarize
A neurotransmitter from a presynaptic neuron causes an inhibitory postsynaptic potentials (IPSPs), in the postysynaptic neuron. The following event will occur first : Potassium ligand-gated channels open.
Inhibitory postsynaptic potentials or IPSPs, on the other hand, are triggered by the opening of chloride channels. The equilibrium potential of chloride is -65 mV. Thus, if a neuron is resting at −60 mV, chloride channels will flow into the cell due to the electrochemical gradient when the chloride channels open.
As an inhibitory neurotransmitter, GABA normally causes hyperpolarization of postsynaptic neurons, producing inhibitory postsynaptic potentials (IPSPs), whereas glutamate causes depolarization of postsynaptic neurons, producing excitatory postsynaptic potentials ( EPSP).
IPSPs are generated when inhibitory presynaptic cells attach to dendrites and initiate action potentials. Presynaptic inhibitory neurons are involved in the release of specific neurotransmitters.
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In biology, interacting populations in a particular area are called an
PLSS ANSWER
Which of the following is a way that animals can harm the environment?
Blocking sunlight
Dispersing seeds
Providing shelter
Spreading disease
Answer:
Spreading Disease
Explanation:
Animals can pick up disease then travel with it spreading it, therefore, harming the environment.
Which of the following are correct regarding carbohydrates?
Answer:
Anomeric carbon comes from the corresponding aldehyde or ketone
I need help just give the answer please
Answer:
8. Stomach
and the second answer
9. small intestine
A hetero gous ail yellow plant is crossed with a homorygous short green. Show the genoype od phenotypes of the Fi offspring and the probability of each.
The genotype of the F1 offspring is YyTt, and the phenotype is yellow and tall. The probability of each phenotype in the F1 offspring is as follows yellow and tall is 1/2 or 50%, green and short is 1/2 or 50%.
The genotype and phenotype of the F1 offspringGenotype refers to the genetic makeup or combination of alleles present in an organism, while phenotype refers to the observable traits or characteristics expressed by an organism. Genotype represents the genes an organism carries, while phenotype represents the physical or observable features resulting from the interaction between genotype and the environment.
When a heterozygous ail yellow plant (genotype Yy) is crossed with a homozygous short green plant (genotype tt), the F1 offspring will have the genotype YyTt and the phenotype of yellow and tall. The probability of this phenotype occurring in the F1 generation is 50%. Additionally, there is a 50% probability of the F1 offspring having the phenotype of green and short.
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Organic compounds are used as buildings?
Explanation:
your answer is true, organic compounds are used as buildings
Two scientists are both studying RNA. One scientist is studying RNA in mice and the other is studying RNA in E. coli bacteria. Which of the following best describes how each scientist would use a genetic code?
A. Both scientists would use the same genetic code because all organisms have RNA.
B. Both scientists would use the same genetic code because in all organisms the code is read three bases at a time and in the same direction.
C. The scientist studying mice would use the genetic code for mice and the scientist studying E. coli would use the genetic code for E. coli because mice are more complex multicellular organisms.
D. The scientist studying mice would use the genetic code for eukaryotes and the scientist studying E. coli would use the genetic code for prokaryotes because they each have different types of chromosomes.
Answer:
B. Both scientists would use the same genetic code because in all organisms the code is read three bases at a time and in the same direction.
Explanation:
The genetic code, which refers to how a gene is used to synthesize a protein in cells, is said to be NEARLY UNIVERSAL for all living organisms. This characteristics means that the same genetic code is used by almost every living organism.
According to this question, two different scientists are studying RNA in mice and E.coli bacteria respectively. Based on the characteristics of the genetic code explained above, each scientist will use the same genetic code for the two organisms because in all organisms the code is read three bases at a time called CODON and in the same direction.
What would happen to this ecosystem if another apex predator, such as a killer whale, was introduced?
The introduction of an apex predator, such as a killer whale to an ecosystem can have significant impacts on the existing food web and ecosystem dynamics.
Thus, the presence of a new apex predator, such as a killer whale increases the competition between the existing apex predator and the newly introduced predator for food resources, such as seals and sea lions.
The introduction of a new apex predator can also affect the behavior of the existing species. For example, the seals can change their behavior to protect themselves from predation by the killer whale by changing their movement patterns.
The introduction of a new apex predator like a killer whale to this ecosystem require careful monitoring and management to minimize the negative impacts on the ecosystem.
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