The thing that is changed on purpose is called the manipulated variable. Sometimes it is also called the independent variable. In an experiment, there are many variables for a scientist to keep track of. A variable is anything that can change in an experiment.
The variable in the experiment that the scientist manipulates is called the independent variable.
Explanation:The variable in an experiment that the scientist manipulates is called the independent variable. It is the variable that the scientist deliberately changes in order to observe its effect on the dependent variable, which is the outcome or response being measured. For example, in an experiment testing the effect of fertilizer on plant growth, the scientist can manipulate the amount of fertilizer applied to different groups of plants and observe the resulting growth as the dependent variable.
It is the factor being tested to observe its effect on the dependent variable, which is the outcome or response under investigation. By altering the independent variable, scientists can assess its impact on the experiment's results and draw conclusions about cause-and-effect relationships.
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Complete Question:
The variable in the experiment that the scientist manipulate is called ?
How was the first periodic table of the elements organized?
Select one:
a. in alphabetical order by element name
b. by atomic number of the atoms that make up each element
c. by average number of neutrons in the atoms that make up each element
d. by average atomic mass of the atoms that make up each element
the answer would be D
explain how predators differ from parasites. give an example of each kind of organism
Parasite: Parasites are different from predators because parasites only take resources from one host, whereas predators eat many prey. A good example of this is the trematode parasite Schistosoma mansoni. An adult schistosome parasite lives inside of just one human host
Final answer:
Predators kill and eat prey, reducing the prey's ability to survive and reproduce, like lions hunting zebras. Parasites live on or in a host and feed off it without immediate lethality, such as mosquitoes on humans. Ladybugs (predators) and mosquitoes (parasites) serve as examples from the insect world.
Explanation:
Predators and parasites have different relationships with their prey or hosts, respectively. A predator is an organism that kills and consumes another organism, which is known as its prey. By doing so, the predator always lowers the prey's fitness by preventing it from surviving or reproducing. Common examples of predator-prey relationships are lions hunting zebras or bears catching fish.
In contrast, a parasite is an organism that lives on or in a host organism and feeds off of it without immediately killing it. The parasitic relationship benefits the parasite while harming the host by siphoning resources that the host would usually use to maintain itself. Parasites may eventually kill their hosts, but there is often a selective pressure to delay this process, allowing the parasite to complete its reproductive cycle. Common examples of parasites include mosquitoes feeding on human blood or mites infesting a beetle.
For example, in the insect world, a predatory organism might be a ladybug (Order Coleoptera) which feeds on aphids, whereas a parasitic organism could be a mosquito (Order Diptera) which feeds on blood from various hosts.
Which substance, when added to public water, helps to prevent tooth decay? Sodium Halide Chloride Fluoride
Hey there!
Fluoride would be the correct answer. This is what you would find in most, if not all toothpastes.
Hope this helps!
What happens to the structure of the protein when the critical point of temperature is reached?
Select all that apply.
A
The enzyme becomes denatured.
B
The enzyme loses function.
C
The protein structure is disrupted.
D
The structure of the protein is not changed.
The answers that apply are; A, B, & C
Proteins work at a particular range of temperatures, working optimally at around 37 degrees (body temperatures). When the temperatures exceed 40 degrees, the protein becomes denatured. This means that it loses its structure because the high temperatures break the hydrogen bonds that play a significant role in its tertiary structure. When denatured, the protein is unable to perform its function because the active site is also lost or is no longer effective.
HELP ME PLEASE
A cellular enzyme is effectively deactivated by an increase in temperature of 10°C. Which is the most likely mechanism of the deactivation?
A. The enzyme, which is a carbohydrate, breaks apart into glucose molecules.
B. The enzyme, which is a protein, breaks apart into individual amino acids.
C. The enzyme changes shape and is no longer able to bind the substrate.
D. The enzyme reacts with the substrate to produce side products.
The answer is; C
When the temperatures are increased, the protein structure is destabilized because the essential hydrogen bonds between amino acid residues that maintain the protein structure begin to be broken. This is called denaturing of the protein. The protein loses shape and the active site is distorted causing the enzyme to be unable to bind to its substrate.
The enzyme is most likely inactivated by a process known as denaturation, in which it changes shape due to a temperature increase and is unable to bind to its substrate. This explanation corresponds to option C.
Explanation:The increase in temperature is most likely causing the cellular enzyme to deactivate through a mechanism known as denaturation. In this process, which option C describes, the enzyme, a type of protein, changes its shape and is no longer able to bind to the substrate it normally interacts with. When an enzyme's shape changes in this way, its active site – the place where it interacts with its substrate – is often altered, preventing the enzyme from performing its function.
A crucial point here is that enzymes are not carbohydrates that can break down into glucose molecules (option A) or proteins that disintegrate into individual amino acids (option B) with a change in temperature. Also, enzymes do not typically react with substrates to produce side products (option D); instead, they act as catalysts to accelerate reactions between substrates without themselves altering.
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Which best defines homeostasis
Well homeostasis is the tendency toward a relatively stable equilibrium. It basically means to maintain internal Stability.
what happens during the first step in DNA replication?
The first step in DNA replication is the separation of the two DNA strands that make up the helix that is to be copied.
It starts when a protein starts the unwinding of the DNA helix. Next comes the separation of the DNA strands right before the transfer of genetic data to the newly assembled DNA strands starts. A protein known as helicase is what breaks down the hydrogen bonds between strands of DNA during replication.
The most common map projections are based on three geometric shapes. Which of the following geometric shape is not one of the three geometric shapes
A geometric shape is the geometric information which remains when location, scale, orientation and reflection are removed from the description of a geometric object. ... Such shapes are called polygons and include triangles, squares, and pentagons.
The most common map projections are based on three geometric shapes: the cylinder, the cone, and the plane. The cylinder is used for Mercator projections, which distort sizes as latitude increases. Any shape other than these three is not commonly used for map projections.
Explanation:The most common map projections are based on three geometric shapes, which are: the cylinder, the cone, and the plane. Map projections like the Mercator projection are based on a cylinder, meaning they project the globe onto a cylinder so that all the latitude lines have the same length as the equator. However, since the Earth is spherical, such cylindrical projections lead to distortions, especially near the poles where the map becomes increasingly stretched.
These distortions explain why on a Mercator projection map, regions such as Greenland or Antarctica appear significantly larger than they actually are when compared to equatorial regions. Due to the variation in shape, there could be many misconceptions about the true size of continents. For example, the True Size comparison shows that the United States, China, and India could all fit within the actual area of Africa with room to spare, whereas a Mercator map may suggest differently.
It is important to note that while these three shapes are most commonly used for map projections, there are numerous other ways earth's surface can be represented, each with its own set of compromises. Therefore, the correct answer to the student's question is that any geometric shape not among the cylinder, cone, or plane is not one of the three commonly used shapes for map projections.
Which steps do geologists use to find the epicenter of an earthquake?
Geologists appropriate seismic streams to determine an earthquake's epicenter.
Explanation:You first require to record the coming times of the P waves and S waves from the seismograph and then deduct them.
Once you discover the time variation, you then require to look on a distance-time plan to discover how far from the epicenter that 1 seismograph is.
Then, on your map, using the map's scale, you need a compass and initiate the compass just to the distance you determined on the distance-time graph.
Using the area of the seismograph as the center-point, trace around with the compass. The range of your circle should be equivalent to the measure from the distance-time graph.
You later need to do this alike calculation for two additional seismographs. Where the three circles meet, such is the epicenter of that earthquake.
Answer: seismograph
Explanation: just did the assignment
DNA can be found it what organelles
You may be referring to the nucleus. The nucleus controls the cell, and it contains chromosomes (DNA) genetic makeup. Hope I could help|!
DNA is primarily found in the nucleus of eukaryotic cells. However, it also exists in organelles such as the mitochondria and chloroplasts. In prokaryotic cells, DNA is found in a region called the nucleoid.
Explanation:Deoxyribonucleic acid, otherwise known as DNA, carries the genetic instructions used for the functioning and development of all living organisms. DNA primarily resides within the nucleus of eukaryotic cells. However, it is also found in other cell organelles, such as mitochondria and chloroplasts. In the nucleus, the DNA is organized into structures called chromosomes. Each chromosome contains many genes. Proteins, which are vital for the cell's functionality, are crafted based on the information stored in these genes.
In prokaryotic cells, DNA, usually in the form of a single, circular chromosome, is found in a region in the cytoplasm called the nucleoid, which is not enclosed by a nuclear membrane like in eukaryotes. This structural difference reflects the evolutionary complexity and diversity among living organisms. However, regardless of the type of cell, DNA serves as an essential component, informing the cell's activity and playing a determinant role in its structure and capabilities.
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the most abundant element in the atmosphere can also be found in
the answer for this question is beans and whey protein.
nitrogen which makes up about 79 percent of air and is found in beans and whey protein.
The cell model below shows 2 solutions separated by a selectively permeable membrane indicated by the red dashed line.
What will most likely occur in this case?
The number of molecules on side A will increase and decrease on side B
The water level on side A will increase, but remain the same on side B.
The water level will increase on side B and decrease on Side A until concentrations are equalized.
The water level and number of particles will equalize on both sides of the membrane.
So naturally, Water loves to be with water. This is just a common knowledge of biology. The side with the least amount of water will recognize that the opposing side has more water. Water molecules in Side A will essentially try and cross the selectively permeable membrane and go onto the crowded side. This will make the Cell in A become lysed and it will shrink. Your answer will be:
C. The Water level will increase on side B and decrease on Side A until concentrations are equalized.
The most likely to occur in this case will be C. The water level will increase on side B and decrease on Side A until concentrations are equalized.
A permeable membrane is vital as it allows for the passage of water in a solution. Based on the diagram, the water molecules that are in Side A will try and cross the permeable membrane to side B.
This will therefore lead to less water in cell A and thus it becomes lysed and it will shrink. Therefore, the water level will increase on side B and decrease on Side A until concentrations are equalized.
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I NEED HELP! PLEASE?
When are fibers considered individual evidence?
A) when they are torn
B) when the yarn is twisted
C) when the yarn is knotted
D) when two or more different fibers are blended
Which of these are the correct sequence of events at a crime scene?
A) Secure the scene, search for evidence, collect evidence, send evidence to laboratory for testing, take photographs, take notes.
B) Secure the scene, search for evidence, take notes, collect evidence, send evidence to laboratory for testing, take photographs.
C) Secure the scene, take photographs, take notes, search for evidence, collect evidence, send evidence to the laboratory for testing.
D) Secure the scene, take photographs, send evidence to the laboratory for testing, take notes, search for evidence, collect evidence.
i sasy A for question one and C for question two
Hope this helps out!
Answer: 1. A) when they are torn
Explanation:
An individual evidence is the one which exhibit the wear and use patterns which can give details for a particular ownership.
Among the options given the fibers considered individual evidence when they are torn. This is because of the fact that the torn fiber indicates that it's other part will be available at some place which can be linked and the ownership of the fiber can be determined.
Answer: 2. C) Secure the scene, take photographs, take notes, search for evidence, collect evidence, send evidence to the laboratory for testing.
A crime scene is required to be handled carefully so as to maintain the integrity and reliability of the evidences. The following are the sequence of events followed at the scene of crime.
Securing the scene: The crime scene should be secured so as to avoid the entry of unwanted individuals who can destroy the available potential evidences.
Take photographs: The photographs should be taken as soon as possible after securing the crime scene. The photographs can be used to record the scene of crime in it's original form. It will help in recognizing the position of the potential evidences at the scene of crime.
Take notes: Notes about the time of visit, place and position of the evidences and condition of the crime scene should be recorded.
Search for evidence: The crime scene should be searched for evidences so as to make them a potential sword against the culprit.
Collect evidence: The evidences should be collected from the scene of crime with utmost care so as to prevent the inclusion of the contaminants.
Send evidence to the laboratory for testing: The experimental chemical and physical analysis of the collected evidences can help in making up expert testimony which can be used against the culprit in the court of law.
What is the largest available source of fresh water for drinking in the hydrosphere?
Oceans, rivers, glaciers, aquifers/ground water, atmosphere, and biosphere. Frozen hydrosphere is the largest reservoir of fresh water, but ground water is the largest available source of fresh water.
Answer:
Groundwater
Explanation:
Compare and contrast the three different types of passive transport: Diffusion, Osmosis, and Facilitated Diffusion.
Similarities:
Both move from a region of high concentration to a region of low concentration through a partially permeable membrane.
Differences:
Facilitated diffusion is for any small particles which can pass through a partially permeable membrane while osmosis is only for water molecules.
Final answer:
Diffusion, osmosis, and facilitated diffusion are three types of passive transport across a cell membrane.
Explanation:
Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion, osmosis, and facilitated diffusion.
Diffusion is the movement of molecules from an area of high concentration to an area with a lower concentration.
Osmosis is the diffusion of water across a selectively permeable membrane.
Facilitated diffusion requires the assistance of proteins to move molecules across the cell membrane.
neutrons have a negative electrical charge true or false
Your answer is true. SUPRISE FACT ABOUT ATOMS!!: When you think of an atom what do you think of? Problily a small circle with afew rings around it right? Well, actually an atom doesnt look like that at all!! An atom looks sort of like the Solar System, and the little rights are like the rotation the planets spin in, also the little star like balls/dots dont actually go around the atom's center, but go in many diffrent places it can be far from the atom, or can be very close! An atom is unpredictable, so there is no correct answer to where the atom's little balls/dots will end up next. I hope this helped, and also hope you liked/loved the Fun-Fact!! Your fellow Brainly user, GalaxyGamingKitty
Answer:
false
Explanation:
During the course of many cell processes, a molecule of ATP may break apart to form a molecule of ADP and a phosphate group. How is this action of ATP useful to the cell? ANSWER CHOUCES: A) stores chem. energy for the cell to use at later time B) releases chem. energy for cell to use immediately C) absorbs heat, which prevents the cell from overheating D) Removes a metabolic poison from cell
B. The cheical energy is released immediately for the cell to use.
Which of the following molecules get recycled during photosynthesis?
NADPH and ATP
CO2 and NADPH
ATP and glucose
Water and glucose
The right option of this question is (A).
ExplanationWhen the light absorbs by the photosynthetic apparatus, the water molecules break down to produce essential material to continue the photosynthetic cycle as electron and H-ions. The H-ions becomes stored in thylakoid chamber and passed through the ATP synthetic machines to refill the ADP or AMP molecules. The generated electron passes through the various stages of photosynthetic series to finally produce the NADPH which also acts as energy transfer compound. At the PSI, the electron transfer to the NADP to generate NADPH.
The carbon dioxide is produced during the respiration cycle and glucose during the Calvin Cycle. So, the right option is (A).
Will mark brainliest helpppp :((
The answer should be A. Decreases because the number of predators increases.
A- Decreases because the number of predators increases
which statement is true about nitrogen and oxygen?
Hello. This question is incomplete. The full question is:
"Which statement is true about nitrogen and oxygen? A. They make up about 99.9% of the human body. B. They are both made of protons, neutrons, and electrons. C. They are both used to make water molecules. D. Neither contains subatomic particles."
Answer:
B. They are both made of protons, neutrons, and electrons.
Explanation:
Nitrogen and oxygen are elements known to all of us. An oxygen molecule is an oxygen atom and a nitrogen molecule is a nitrogen atom.
As we know, all atoms are formed by three particles: protons, neutrons and electrons. For this reason, we can say that both oxygen and nitrogen are composed of protons, neutrons and electrons. For this reason, the letter B is the correct alternative.
As scientists have developed more productive crop varieties, farmers have switched from growing many traditional varieties to new high-yield varieties. For example, in Peru, the Indians once grew 500 native varieties of potatoes. That number has been reduced to about twenty major potato varieties, worldwide. Why is it potentially dangerous to reduce the number of crop species in potatoes? A) It reduces the variety of crops available for human diets. B) It requires a larger investment than small farmers can make. C) It makes the overall crop more susceptible to pests or disease. D) It could reduce or cause the extinction of some predatory insects. Submit
C) It makes the overall crop more susceptible to pests or disease. is the correct answer
Answer:
Option C, It makes the overall crop more susceptible to pests or disease.
Explanation:
An organism keeps on evolving and varying from its previous generation based on the gene pool. The larger is the gene pool, the higher is the scope of variation.
Now in this case farmers have stopped a growing traditional crop, which means there are only limited genes in the entire gene pool of hybrid potato which are free to vary based on the mating scenario.
This limit on variation based on reproduction will ultimately reduce the natural ability of a crop to generate characteristics that could support it to survive in adverse condition. Thus, GMO may become more susceptible to the new evolved species of pest (which is free to evolve naturally)
Hence, option C is correct
Which statement is mostly likely to apply to a cell that has DNA within it cytoplasm
It performs all functions for the organism.
Hope this helps!
which characteristic is common in old rivers?
A. Lack of tributaries
B. Location near headwaters
C. Lack of meanders
D. A low stream gradient
i think i would say (D) A low stream gradient
Old rivers commonly have a low stream gradient, which leads to a slower flow and higher tendency to form meanders as they flow across flatter landscapes closer to their mouths. Hence, the correct option is D.
As rivers age, they tend to develop wide, meandering courses with a gentle slope. This low gradient results in a slower water flow, which encourages the river to meander across the landscape. Additionally, old rivers are characterized by having developed numerous tributaries over time, increasing their size and contributing to their slow, meandering nature. Moreover, rather than being located near their headwaters, old rivers tend to be found closer to their mouths where the land is flatter. Contrary to being straight, old rivers are typically full of bends and loops known as meanders.
4. Coevolution is when two species that have close ecological interactions evolve jointly over time.
No. In biology, coevolution occurs when changes in at least two species' genetic compositions reciprocally affect each other’s evolution.
Answer:
No, coevolution never occurs when two species that have close ecological interactions evolve jointly over time.
Explanation:
The coevolution is the process in which two species evolves together. These species affects each other. In coevolution, species shares close ecological interactions.
The ecological relationship which shows coevolution are parasitism and competition, mutualism. In parasitism one species is negatively affected and the parasite gains the benefit. In competition both species harm each other.
In mutualism both species gains the benefit.
In the chemical reaction that takes place in the lighting of a match, activation energy is supplied by _____.
1.Which activity would you predict is most likely to have the smallest impact on environmental systems? A. using more land to grow corn that is used to produce fuel B. using land to create a national park C. building a dam for energy production D. building new housing in an area far from a city
The correct answer is option B, that is, using the land to create a national park.
National parks refer to big areas of public land set aside for the native animals, plants, and the habitats in which they thrive. The national parks safeguard the places of natural beauty and are home to various endemic species.
National parks are in real sense safeguarded regions, conserving biodiversity is the central aim for such protected areas. The national parks offer a safe home for the local animals and plant species, they also help in keeping the water and air clean.
The activity with the smallest environmental impact is likely using land to create a national park. This is because such areas are generally protected from development and exploitation, preserving ecosystems and biodiversity.
Explanation:From the options A, B, C, and D, the activity most likely to have the smallest impact on environmental systems is using land to create a national park (Option B). When lands are designated as national parks, they are typically protected from most forms of development and exploitation. These areas serve to preserve natural ecosystems and biodiversity, having a minimal negative impact, and sometimes even positive impacts, on the environment. In contrast, using land to grow corn for fuel (Option A), building a dam for energy (Option C), or constructing new housing in remote areas (Option D), involve significant changes to the land and can disrupt ecosystems, leading to substantial environmental impact.
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Need help ASAP
The image depicts
A) that organisms have changed over time
B) that the Cenozoic Era came before the Paleozoic Era
C) that the Paleozoic Era is the most recent era in time
D) that the organisms living on Earth have remained unchanged over time
Answer:
Option A, hat organisms have changed over time
Explanation:
Here option B is incorrect as Cenozoic Era came after the Paleozoic Era.
Option C is also incorrect because Cenozoic Era is the most recent era while Paleozoic Era is the oldest.
Option D is incorrect as it is visible from the graph the animal species on planet earth have changed a lot from Paleozoic Era to Cenozoic Era
Thus, the only correct answer is option A, as it is clearly visible from the graph that organisms have changed drastically over time on planet earth.
Which of these is an example of a change where the properties of the original substances remain the same?
A) roasting corn on the cob
B) soaking rice in the water
C) toasting bread
D) digesting food
I GIVE BRAINLEST !
Which of these is an example of a change where the properties of the original substances remain the same?
the answer is B
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what is the difference between a control group and an experimental group?
Control Group: Group that is being controlled .This group doesn´t receive the treatment from the researchers
Experimental Group:Group that is being Experimented and that receives the testing
An experimental group is the group in an experiment that receives the variable being tested. One variable is tested at a time. The experimental group is compared to a control group, which does not receive the test variable. In this way, experimental groups are used to find answers in an experiment.
The difference between a control group and an experimental group is that the independent variable is changed for the experimental group, but is held constant in the control group.
In this way we came to know the result of the experiment by calculating the difference between them.
How would you define the term energy?
energy is property that must be and can be transferred to an object
Answer: Energy is the ability to do work. Living things need energy to grow, develop, move, and perform voluntary and involuntary body processes.
Plato Answer