Answer:
Independent variable: FERTILIZER
Explanation:
The independent variable in an experiment is the variable that is changed or manipulated by the experimenter in order to bring about a measurable response.
In this experiment, the effects of fertilizer on plant growth is tested. Two groups: Group A and B were used. Group A was not given any fertilizer, while Group B was given fertilizer. This portrays that the experimenter is manipulating the FERTILIZER. Hence, the FERTILIZER is the independent variable.
Warm-Up
Type your response in the box,
Cell theory states that all living things contain one or more cells. Why do you think cell theory meets the definition of
a scientific theory? Do you think it should be a scientific law? Explain your response.
Yes, Because that theory can easily be backed up with facts and evidence making it a scientific law
Answer:
Cell theory meets the definition of a theory because it has been tested over a long period of time, and scientists have plenty of evidence to support this theory. However, it doesn’t seem to meet the criterion of a scientific law. Scientists only know about life on this planet, so the theory may not be universal if life is found on other planets. In addition, scientists don’t have much data on the earliest forms of life on Earth.
Explanation:
plato 2020
Louis Pasteur likely worked with a hypothesis similar to this one:
"If liquids are heated to a certain temperature and germs die, then the liquids will be less likely to cause sickness when consumed, because reducing germs is a way to prevent disease.”
How was this new hypothesis most likely inspired by the work of Joseph Lister?
Lister had taught that boiling water makes it safer to drink.
Lister’s experiments showed that reducing germs during surgery prevented infection.
Lister’s experiments showed that germs can cause infection no matter how they enter the body.
Lister had established the fact that germs grow and spread through air and foods.
Answer:
bbbbbbbbbbbbbbbbbb
Explanation:
Answer:
lunar stop before i report ur account .-.
Explanation:
b
Which would be the most effective way to minimize a rat population in an alley?
A. Kill as many rats as possible by poisoning and trapping them.
B. Clean up the alley so that the rats have no garbage to feed on.
C. Lure the rats away to another site where they will be less harmful.
D. Search out and kill very young pre-reproductive rats.
E. Release cats into the alley
Answer:
E
Explanation:
I would assume E because B and D is too much work and wont decrease the numbers C is wrong becuase the rats will always just come back and A is wrong becuase that woud just make rats endangered
There are more electrons than protons in a negatively charged atom.
True
False
Answer:
The correct answer is True.
Explanation:
An ion is formed when an atom looses or gain electron. If an atom gains electrons, it will have more number of electrons than protons. Thus, it will carry negative charge and will lead to the formation of anion. If an atom looses electrons, it will have less number of electrons than protons.
Identify the type of charge of the following particles in an atom
1. Electron
2. Neutron
3. Proton
What is the location in the atom of the following particles (in nucleus, area outside nucleus)
4. Electron
5. Neutron
6. Proton
7. Which particle has a larger mass? Proton or electron?
8. Which particle as the same mass as a neutron?
9. If you break an atom apart would it still behave like the element that makes it up? (yes/no)
10. What is the name of the smallest atom?
Answer:
1) negative
2) neutrial
3) positive
4) area outside the nucleus
5) &6) in nucleus
7) i think proton, not sure
8)proton, i think , again not sure
9) no
10) helium has the smallest atom
Which of the following units of measurement would you use to describe the length of your pencil?
O A. Grams
O B. Meters
O C. Kilograms
O D. Centimeters
Nucleotides contain all of the following except what ?
The Answer is:
Protein
Nucleotides contain all of the following except histones.
What are Nucleotides?Nucleotides may be defined as a molecule that consists of a nitrogen-containing base, a phosphate group, and a sugar.
Histones are present in the DNA along with proteins. They assist in the condensation of chromatins.
Therefore, nucleotides contain all of the following except histones.
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The complete question is as follows:
Nucleotides contain all of the following except what?
a 5-carbon sugar.a phosphate group.a nitrogenous base.histones.Help me pls
It will mean a lot
Answer:
i think its carbon dioxide
Explanation:
Answer:
Carbon Dioxide
Explanation:
The reaction given to us is the photosynthesis reaction:
6CO₂ (g) + 6H₂O (l) + energy (sunlight) → C₆H₁₂O₆ (s) + 6O₂ (g)
Plants taken in carbon dioxide, water, and sunlight to produce sugar and oxygen.
Which of the following substances may NOT pass through the cell membrane freely? oxygen, carbon dioxide, water or proteins
An invasive species that lives in habitats up to 1,000 meters deep and feeds on small fish only was introduced in this ecosystem. What would be the likely impact?
Answer:
Species A's population will decrease due to limited space in the ecosystem.
Explanation:
Answer:
A
Explanation:
This will decrease because there is limited space in the ecosystem. So the invasive species will destroy species A.
Based on the model, what will be the mean diameter of the phytoplankton cells that are found 25 kilometers
from shore?
Full in the blank
And answer all parts
i can give you the monomers for all of them
carb - monosacharride
lipid- glycerol and fatty acids
protein- amino acid
nucleic acid- nucleotides
How do most plants take up nitrogen?
Answer:
Hello. Let me explaine.
Explanation:
Most plants usually use four ways to absorb nitrogen from soil:The atmospheric nitrogen enters empty spaces between soil grains. There are special bacterias that transform atmospheric nitrogen into amoniom ion. Then، amoniom ion is absorbed by plant. The second way starts after transforming atmospheric nitrogen to amoniom ion. The amoniom ion is transformed to nitrate ion by another special bacteria. Then the nitrate is absorbed by the plant. Another way starts from the homous. Homous is transformed to amonia (NH3) by an another special bacteria then the amonia reactions with H+ in soil and makes amoniom. Then amoniom ion is absorbed by the plant. The fourth way after production of amoniom from homous، it is transformed to NO3- then it will be absorbed by the plant.What is a waste product created by plants during the light-dependent reaction of photosynthesis that is released as a gas into the atmosphere and used by heterotrophs.
Answer:
Oxygen
Explanation:
Oxygen is a gaseous non-metal element that is taken up by animals (heterotrophs) during the process of respiration. Animals need oxygen to be able to survive.
Oxygen is produced by plants (autotrophs) into the atmosphere through a process called photosynthesis. The process of photosynthesis is when plants take up carbondioxide and water in the presence of energy captured from sunlight and further produces glucose (carbohydrate) and release oxygen into the atmosphere as a byproduct.
Part C
Evaluate both of your solutions. What are the pros and cons of each solution?
Answer:
Constructing a safe passage for fish seems like a way to avoid the problem, and in theory, it could reduce the risk of injury or death to fish. But my research shows that building fish passages can be difficult, and their effectiveness is mixed. Also, different passages may need to be built for different species, which is time-consuming and costly.
Working with engineers to design a dam with these risks in mind seems to be the ideal solution, because we can design the dam with the native species in mind. But the biodiversity issues related to hydroelectric dams is a fairly new concern, so we may not have a lot of past evidence to reference. We may have to use the trial and error method, which seems risky.
Explanation: Plato
Answer:
Constructing a safe passage for fish seems like a way to avoid the problem, and in theory, it could reduce the risk of injury or death to fish. But my research shows that building fish passages can be difficult, and their effectiveness is mixed. Also, different passages may need to be built for different species, which is time-consuming and costly.Working with engineers to design a dam with these risks in mind seems to be the ideal solution, because we can design the dam with the native species in mind. But the biodiversity issues related to hydroelectric dams is a fairly new concern, so we may not have a lot of past evidence to reference. We may have to use the trial and error method, which seems risky
Explanation:
PLATO
Please Help!!
Thanks!!
Answer:
Explanation:
To swim easily in water
Option A is the correct answer
which of these is not a function of hair?
a.protection
b. Movement
c.touch (sensory)
d. Heat loss prevention
Answer:
B
Explanation:
Movement is not a function of hair, as having less of it actually technically makes it easier to move.
A- true, eyelashes and other hair protect from harmful sun and irritants
C- hair is generally considered to be a sensory organ
D- hair is most commonly considered a way for animals to stay warm
The function that is not of the hair is movement. The correct option is b.
What is hair made of?Keratin, a tough protein, is used to make hair. Each hair is anchored into the skin by a hair follicle.
The hair bulb is basically the foundation of the hair follicle. Living cells divide and grow in the hair bulb to form the hair shaft.
Keratin is produced by keratinocytes and is insoluble in water, ensuring the hair's impermeability and protection.
Hair DNA is genetic material that is used to build our hair. Person's hair follicle encompass nucleic acid DNA, while our hair shaft contains mitochondrial DNA."
Hair functions include protection, temperature regulation, and perspiration evaporation; hairs also function as sense organs.
Thus, the correct option is b.
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In which process is nitrogen from the air put into a form that plants can use?
Answer:
fixation. you're welcome
imagine that a new surgical procedure has been developed to treat spinal cord injury. what are some possible risks and benefits of having this procedure?
A doctor counts the number of asthma attacks a person has after switching medications. Which type of data is she collecting? Quantitative data qualitative data experimental data observational data
Answer:
Quantitative data
Explanation:
The collection of data is very key to any experiment as it is the way in which the results of what is being tested is analysed. There are however, two ways to scientists collect data in their investigation. These ways are quantitatively and qualitatively.
Quantitative data collection involves the type that has to do with numbers or counts while qualitative data does not deal with numbers. In this question, a doctor counts the number of asthma attacks a person has after switching medications. The COUNTING represents that the type of data collected by the doctor is QUANTITATIVE.
Answer: Quantitative Data
Explanation:
*EXTRA POINTS*
If a gas is cooled, what will happen to its volume?
If a gas is heated, what will happen to its volume?
Why wouldn’t the clam be considered a keystone species?
Answer:
Keystone species, in ecology, a species that has a disproportionately large effect on the communities in which it occurs. Such species help to maintain local biodiversity within a community either by controlling populations of other species that would otherwise dominate the community or by providing critical resources for a wide range of species. The name keystone species, coined by American zoologist Robert T. Paine in 1969, was derived from the practice of using a wedge-shaped stone to support the top of an arch in a bridge or other construction. Just as other stones in the construction depend on the keystone for support, other species in a biological community depend on the presence of a keystone species to maintain the community’s structure.
The starfish Piaster ochraceus is a keystone species in the rocky marine inter tidal communities off the northwest coast of North America. This predatory starfish feeds on the mussel Mustily Californians and is responsible for maintaining much of the local diversity of species within certain communities. When the starfish have been removed experimentally, the mussel populations have expanded rapidly and covered the rocky inter-tidal shores so exclusively that other species cannot establish themselves. Consequently, the interaction between Piasters and Mustily supports the structure and species diversity of these communities. In other communities in which Piasters occurs, however, the starfish has little overall effect on the structure of the community. Therefore, a species can be a keystone species in some communities but not in others.
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Use the model below to explain how the sound from the ambulance’s siren appears to change as it drives past the girl. Why does the girl hear the sound differently as the ambulance travels past her?
Develop your claim of why the girl hears the sound differently as the ambulance travels past her. *
Answer:
The girl hears the ambulance sound different. The first part of the picture shows the girl and the sound waves, and they are right in front of her, so she cannot hear them as well. But the second image shows the girl in the middle of the sound waves. This is the strongest and loudest part of the sound waves, so it sounds different to the girl in the image.
Also, in the first image, the sound waves would most likely sound higher than in the second image. The sound would continue to get lower in frequency the father it drove away. This is because of the Doppler Effect. The Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer.
Explanation:
Describe the role of steam in a nuclear power plant
The role of steam in a nuclear power plant is to generate electricity.
In nuclear power plant, the heat energy that is produced from nuclear fission is used to boil water that is present in huge boilers. Due to high amount of heat energy, the water turns from liquid to steam or gaseous state. This steam is collected in a chamber and release it with a huge pressure on the blades of the turbine which start moving due to this steam and as a result electricity is produced so we can conclude that steam is used to produced electricity in the nuclear power plant.
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1. Why is nitrogen important to living organisms?
non biodegradable waste materials can still be reused or recycled to lessen the garbage in the environment. why is it important to lessen the garbage in the environment?
a. when land is dumped with garbage, the land becomes occupied.
b. garbage releases toxins that can cause land and air pollution
c. we can make money out of recycled materials
d. we can save money but out of reused materials
Answer:
b. garbage releases toxins that can cause land and air pollution
Explanation:
Non biodegradable materials are those materials like plastic, nylon, runner etc. that cannot be broken down by microbial action, hence, cannot be decomposed. These materials constitutes waste materials in our environment and cause pollution, which is the release of toxic or harmful substances into our immediate environment.
Recycling or reusing of these non-biodegradable waste is one of the ways to lessen the garbage in the environment. Once the garbage are lessened, the level of pollution is automatically being minimized. This is because garbage releases toxins that can cause land and air pollution.
Answer:
1
Explanation:
1
Which diagram shows the correct relationship between these four regions? (If one symbol is within another symbol, that means it is part of, or included in, that symbol.)
Answer: 1
Explanation:
The diagram that shows the correct relationship between these four regions is the first one. Thus, the correct option for this question is A.
What is the significance of the diagram?The significance of the diagram may be determined by the fact that it helps one in making quick and accurate comparisons of data. They bring out hidden facts and relationships and can stimulate as well as aid analytical thinking and investigation.
According to e context of this question, the condition "if one symbol is within another symbol, that means it is part of or included in, that symbol" is best and most accurately followed by diagram one. This is because the circle is enclosed in a circle and a square is being enclosed by a square.
Therefore, the diagram that shows the correct relationship between these four regions is the first one. Thus, the correct option for this question is A.
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Recall the formula of glucose is C6H12O6. How many carbon, oxygen, and hydrogen
atoms will you need for three glucose molecules?
is water more acidic than air
Answer:
Yes, water is more acidic than air
Explanation:
carbon dioxide in the air can dissolve into bodies of water. The extra carbon dioxide in soda water imparts more acidity to the liquid than would be in gases.
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A student pushes a television cart to the left with a constant force of 100 N. The force of friction between the cart and the floor pushes back to the right with a force of 75 N. If the cart was initially at rest, how will it move as the constant force is applied?
Answer:
Explanation:
As you can see in the badly drawn picture below, the force pushing to the left is 100N while the opposing force pushing the right is 75N. These forces are subtracted from one another, which would leave us with a total force of 25N (100N - 75N = 25N) pushing to the left. Since the cart is initially at rest, this means that there is no additional force being applied left or right of the cart. Therefore, with the 25N of force, the cart would move at a constant speed to the left.
If the cart is at rest, it will move to the left at a constant speed.
We can arrive at this answer because:
The cart is at rest when no force is applied to it.When the student pushes the cart to the left with a force of 100N, the cart will be forced out of rest if this force is greater than the drag force, which pushes the cart in the opposite direction.As we can see, the force that pushes the cart in the opposite direction is equal to 75N, and therefore, we can say that the cart will move to the left.However, the movement of the cart will not be done with a force of 100N, as 75N of this force will be canceled out, due to the force that pushes the cart in the opposite direction. In this case, the cart will move with a force of 25N.
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