An experiment is carried out to answer a question. The hypothesis predicts what is expected to occur. Experimental and control groups are compared to analyze the results, supporting or not the hypothesis.
-----------------------------------------
BACKGROUND
When people are infested with head lice, it is recommended to wash their cloth and dry it with hot air over 53 or 54ºC for 5-30 minutes.
Head lice and eggs seem to die when exposed to those conditions by getting dehydrated.
SITUATION
We will assume that we work in a primary school and that students from the 3rth grade are being affected by this parasite.
We want to know if applying hot air to these students before entering the class will make a difference and help to control this problem.
So, we will propose an experiment to answer this question.
HYPOTHESIS
A hypothesis is a conjecture. A researcher hypothesizes to predict what is going on or what is expected to occur. The hypothesis is a claim of how it works a relation between two or more variables. Usually, it is written in the present time.
Hypothesis ⇒ Applying hot air to students' heads kills the head lice that students are carrying.
To evaluate the effect of hot air, we need to keep control of as many other variables as possible.
To do so, we asked students' families not to use other treatments on students' heads and to bathe them daily.
In this way, we were sure that all students
were equally affected by the parasite, took showers every day, and neither was using any other product that could affect the results.Our population was the 3rth grade students ⇒ 64 children ⇒ 30 girls + 34 boys.
Before the experiment, we separated the 3rth grade into two groups.
Group A ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Experimental groupGroup B ⇒ 32 students ⇒ 15 girls + 17 boys ⇒ Control group
→ Treatment
Each student from group A received hot air every day for one week before entering the class.
Hot air was 53ºC and was applied for 5 minutes.
→ Control
Each student from group B did not receive the treatment for one week before entering the class.
CONTROL GROUP
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.
Individuals of the control group are selected from the same population as the treatment group.
*** These two groups are identical in all aspects except for the independent variable, which changes in the treatment group but remains constant in the control group. ***
The control group is Group B. The only difference between the control and the experimental group is that the first one did not receive the treatment. Every other aspect was equal for both groups.
The only way the control group was treated differently from the experimental group was that the control group did not received the treatment, while the experimental group did.
RESULTS
After one week, groups were compared to see if the hot air was effective in killing head lice.
When comparing the control and the experimental group, we could see that students from group A were free of parasites.
Students from group B were still affected by the head lice.
CONCLUSION
The results support the hypothesis. Hot air turned to be a great treatment for lice control.
-------------------------------------------
Related link: https://brainly.com/question/17314369?referrer=searchResults
https://brainly.com/question/19496416?referrer=searchResults
what can the nucleus enzyme break down?
Answer:
when the nucleus is removed from the cell the cell can no longer function. the nucleus contains the blueprint (DNA) for all the cells operations and without it the organelles cant do their jobs.
Explanation:
what percentage of genetic information is passed on from parents to their offspring
Answer:
50% from each parent
Explanation:
The percentage of genetic information passed on from parents to their offspring is 50% from each parent, for a total of 100%.
What is the percentage of genetic information?Approximately 50% of genetic information is passed on from each biological parent to their offspring. This occurs through the combination of genetic material during fertilization, where half of the offspring's genetic material comes from the mother and the other half from the father.
However, the exact percentage of genetic information passed on can vary due to factors such as genetic mutations and recombination during meiosis.
This occurs through the process of sexual reproduction, where each parent contributes one gamete (sperm or egg) containing half of their genetic information.
When the sperm and egg combine during fertilization, they form a zygote with a complete set of genetic information (100%), half from each parent.
Learn more about Genetic information here:
https://brainly.com/question/6748577
#SPJ2
An Object at Rest video and explain
how it relates to the rock cycle and provide examples
Answer:
Explanation:
XD
Can anybody help me doing this??
lesson: Science
grade: 5
Answer:
Im going to be moving from the top right to the left in a circle. So right to left here
The Sun is top rightSquiggle Arrows going up is evaporation And the evaporation makes the cloudThe second cloud is rainThe third cloud is snowAnd both of the clouds are condensation so I guess maybe put it on the arrowsLabel the mountain right underneath the snowThe water going down the mountain at the top is run offThe water towards the bottom of the mountain that has the arrows is riverThe squiggly lines going down is underground waterAnd the huge body of water is seaExplanation:
uhm, its the water cycle so
Based on the test results, are the worm neurons alive?
Answer:
Yes
Explanation:
In the inner-world perspective of the simulation, the worm is absolutely alive as it is obeying the laws of physics as presented by the simulation.
I HOPE THIS HELPS!!!!!
Since it is adhering to the simulation's depiction of the rules of physics, the worm neurons appear to be completely alive from the simulation's inner-world perspective.
What is the worm?The worm is a frequently utilised organism in neuroscience research, because of the limited amount of neurons it contains For instance, the hermaphrodite form of the worm contains 302 neurons in its nervous system, as opposed to the 86 billion neurons found in humans.
Every animal requires a brain to survive, and worms are no different. Their brains control movement, sensory perception, and any other physical processes essential to their existence. A worm cannot, however, use its brain for thought.
Therefore, The worm neurons appear to be fully alive from the simulation's inner-world perspective because it is obeying the simulation's representation of the laws of physics.
Learn more about the worm, refer to:
https://brainly.com/question/18087051
#SPJ2
Help please
Please help
Answer:
The answer is protein
Explanation:
trust me , hope this helps you!, add me as brainlist
HELP PLS
You are looking at a star through a telescope in January. There is a small shift in the star’s apparent position compared to when you looked at the same star through a telescope in July. What can you conclude about the distance of the star from Earth?
Answer:
the earth moved its position around the sun
How does peer review of scientific articles and replication of test results contribute to the development of scientific theories?
Answer:Careful evaluation of research results by other scientists ensures that only solid and legitimate research results are published, and helps prevent faulty research or false claims from being viewed as scientific fact.
Explanation: it guards against fault science contaminating the literature on which all scientists rely. a hypothesis must be tested repeatedly and those tests must produce the same results before the scientific community will accept the hypothesis.
Peer review of scientific articles and replication of test results are essential processes that contribute significantly to the development and refinement of scientific theories. They help ensure the accuracy, credibility, and robustness of scientific knowledge. Here's how they contribute to theory development:
1. **Quality Assurance:** Peer review involves subjecting a research paper to critical evaluation by experts in the field before publication. This process helps ensure that the research is of high quality, methodologically sound, and contributes meaningfully to existing knowledge.
2. **Identification of Errors and Flaws:** Peer reviewers scrutinize the methodology, data analysis, and interpretations presented in the paper. If there are errors, inconsistencies, or weaknesses, reviewers can identify and point them out. This process helps prevent flawed or misleading research from being published.
3. **Enhancement of Clarity:** Reviewers provide feedback on the clarity of the paper's writing, organization, and presentation of results. This feedback helps authors improve their communication, making the research more accessible to the broader scientific community.
4. **Strengthening Hypotheses and Arguments:** Reviewers assess the logic and coherence of the research's hypotheses, arguments, and conclusions. Constructive feedback from peers can lead to refining hypotheses, modifying experimental designs, or reevaluating conclusions based on the evidence.
5. **Contribution to Scientific Discourse:** Peer-reviewed articles become part of the scientific literature, where they contribute to ongoing discussions, inspire new research directions, and serve as building blocks for future studies and theories.
**Replication of Test Results:**
1. **Verification of Findings:** Replication involves conducting the same or similar experiments to confirm the validity of previously reported results. If multiple independent researchers can replicate the same results, it enhances the credibility of the findings and supports the robustness of the theory.
2. **Identifying Errors and Biases:** Replication attempts may uncover errors, biases, or confounding factors that were not initially identified. This process helps filter out inaccurate or biased results, ensuring that only reliable findings contribute to the body of knowledge.
3. **Assessment of Generalizability:** Replication studies conducted in different settings or with different populations help assess the generalizability of findings. A theory that holds up across diverse conditions gains stronger support.
4. **Refinement of Hypotheses:** In cases where replication produces inconsistent results, researchers may need to revisit their hypotheses, experimental design, or methodologies. This process encourages critical thinking and refinement of theories to better explain observed phenomena.
5. **Building a Cumulative Body of Knowledge:** Replicated results provide a foundation upon which subsequent researchers can build. As more replications occur, a body of consistent and reliable evidence accumulates, contributing to the establishment of well-supported scientific theories.
In summary, peer review and replication play vital roles in the development of scientific theories. Peer review ensures the quality and accuracy of research before it enters the scientific literature, while replication confirms and strengthens the validity of findings. Both processes foster a dynamic and self-correcting scientific community that continuously refines and advances our understanding of the natural world.
To know more about scientific articles :
https://brainly.com/question/10454195
#SPJ3
drag each micrograph to the target that indicates the stage of mitosis or cytokinesis it shows.
Mitosis occurs after the interphase and involves four stages. After mitosis event occurs cytokinesis. The correct order is 1A, 2F, 3E, 4B, 5C, 6D.
------------------------------------------
Mitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced.
First occurs duplication of the cell content, and then the separation into two new cells happens.
Mitosis occurs in only one phase.
• In the prophase, it occurs chromosomes condensation and nuclear membrane breaks.
• During the metaphase, chromosomes are taken toward the center of the cell by the spindle apparatus. Once in the equatorial plane, chromosomes line up.
Each chromatid joins with a microtubule of opposites poles.
• In Anaphase, bonds between chromatids break. They separate and migrate to the opposite poles.
• In telophase, duplicated chromosomes are already in the corresponding poles, and the nuclear membrane forms again in each pole.
• Finally, cytokinesis occurs. Through invagination of the cell membrane, the cells and their cytoplasmatic content get separated.
------------------------------------------------------
Related link: https://brainly.com/question/1983951?referrer=searchResults
Which one of the following traits is nota characteristic of living things?A.Needs energyB.Responds to environmentC.Comes from nonliving matterD.Reproduces
Answer:
C.
Explanation:
If they came from nonliving things, they would not be able to live in the first place
Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed
different photosynthetic pigments from a plant pigment extract can be separated by
The different photosynthetic plant pigments can be separated by PAPER CHROMATOGRAPHY. It is a methodology used to separate different chemical compounds based on their differential solubility.
This method (paper chromatography) uses paper sheets in order to separate mixtures of soluble substances such as, for example, plant pigments.
These paper sheets represent the 'stationary phase' through which a solution is made to pass.
Subsequently, during the mobile phase, the solvent moves through the paper sheet and thus carries (separates) different compounds with it.
Learn more in:
https://brainly.com/question/1394204?referrer=searchResults
Y ir instrumentos de laboratorio usaron luis y Juan?
Luis y Juan querían hacer una investigación sobre la rapidez de disolución de una pastilla efervescente en el ácido acético a temperatura caliente. Para esto, tenían que triturar la pastilla y luego utilizar solamente 15 gramos de la sustancia. Tenían que medir 50 ml de ácido acético y colocar el mismo en un recipiente donde se pueda calentar sustancias, pero que el vapor generado se libere rápido. Al agregar ambas sustancias al recipiente de vidrio, lo comenzaron a calentar. Una vez se iba calentando, agitaron las sustancias poco a poco y con mucho cuidado, tomaron los cambios en temperatura de cada 2 minutos. Al finalizar el experimento, ellos compartieron sus resultados con sus compañeros de clase.
Answer: d
Explanation: just did it on edg
Everything including you and me is made up of matter
True or False
Answer:
Technically, yes.
Explanation:
Depends on your point of view.
NOTE: This excludes light, and photonic interaction. That technically doesn't make up anything, because it has no mass.
Matter is anything that has mass and takes up space. Due to E=MC*2, energy and mass are relative, even though a small amount of mass, has a large amount of energy. So let’s backtrack. Matter is anything. Matter is energy. Matter is nothing? What about in an atom. Or in the vacuum of space? In an atom, between the nucleus, and the electron cloud, there is empty space. In the vacuum of space, most people think there is nothing. Just emptiness, until the next star, or the next planet. That is 100% wrong. I guess they are either thinking too hard or not enough. The vacuum of space actually has energy. Just a small amount of it. It takes up space, that check’s off. It has mass (excluding photons), that check’s off. And yes, it has energy. SO, since energy and matter are interchangeable, everything is made of energy, even though not everything is made of matter. Certain types of energy, sound, heat, light, are not made of energy. Does that mean that photons are not made of Matter? Well, sort of. They have no mass, so technically not, but they do have space and exert a force, which is also mysterious. So, I hope this confused you a little bit, with matter being energy, but not energy being matter. Here is something to spark the imagination: Is fire a solid, a liquid, or a gas
i hope this helps :)
found in airsacs/alveoli in the lungs capilliaries?
Answer:During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli
Explanation: carbon dioxide
viruses are not considered living organisms because they are not composed of:
Answer:
Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things
Explanation:
Answer:Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.
Si una mujer tuviera una masa de 60 kg, ¿cuál sería su masa en la Luna? (la gravedad de la Luna es de 1,67 m / s2)
Answer: d
Explanation: just did it on edg
Hydrogen pumps move hydrogen ions into which structure?
O A. The thylakoid
O B. The mitochondrion
O C. The cytosol
D. The stroma
Answer:
a
Explanation:
i
thực hiện chức năng bài tiết là:
a.ribôxôm
b.ti thể
c.trung thể
d.bộ máy gôngi
2. How did dark matter affect the development of structures in the early universe?(1 point)
It cooled pockets of gas to form nebulae.
It became part of black holes.
It seeded the development of quasars.
It seeded the development of galaxies.
Answer:it seeded the development of galaxies
Explanation:
Dark matter affected the development of structures in the early universe as it seeded the development of galaxies.
Dark matter is simply refered to as a glue that bounds the Universe together. they are also dark matter halos are now stated to be the sites where galaxies were born. The universe as a whole ks made up of helium and hydrogen, dark matter was very essential in giving of the gravitational force needed in the gathering of elements together to form stars.Conclusively we can therefore say that Dark matter is the sit that holds the existence of galaxies.
Learn more from
https://brainly.com/question/17036562
What role do the macromolecules starch and simple sugars play in fruit storage and ripening?
The role that is played by macromolecules such as starch and simple sugars in fruit storage and ripening is that the unripe bananas store starch in their chlorophyll.
Macromolecules refer to very large molecules. The four main classes of macromolecules include lipids, proteins, nucleic acid, and carbohydrates.
It should be noted that starch is stored in the chlorophyll content of the peel of the unripe bananas. During ripening, there'll be an increase in the breakdown of the starch that can be found in the fruit and this will ensure there's an increase in the glucose too.
Read related link on:
https://brainly.com/question/869907
in eukaryotic cells, which organelle produces the majority of the atp for the cell?
Answer:
mitochondrion
Explanation:
BIOLOGY HELP!!! NO LINKS PLEASE!!!
1. Robert Hooke first observed cork cells in 1665 Which statement describes the flaw in Robert Hookes initial conclusion about his observations?
A.) Hooke observed dead cells and concluded that cells are empty structures.
B.) Hooke observed box shaped cells and concluded that all cells are the same shape
C.) Hooke observed structures within the cells and concluded that all cells contain the same structures
D.) Hooke observed similarly sized cells and concluded that all cells are the same size
2. What would happen if the cell membrane of a cell was damaged?
A.) Energy production within the cell would stop
B.) The cell could no longer make proteins
C.) The cell could no longer perform photosynthesis
D.) Cytoplasm and other molecules could leak out of the cell
3. What could happen to a cell if it’s ribosomes did not function properly?
A.) The cell could not convert light energy into sugars
B.) The cell could not send or receive chemical signals
C.) The cell could not synthesize proteins
D.) The cell could not store energy
4. Where do most cellular activities occur?
A.) The endoplasmic reticulum
B.) The mitochondria
C.) The nucleus
D.) The cytoplasm
5. Why are muscle cells packed with mitochondria?
A.) Mitochondria provide important structural support to maintain muscle cell shape
B.) Muscle cells use a lot of ATP generated by mitochondria
C.) Muscle cells relax and contract depending on the number of mitochondria present in the cell
D.) Muscle cells require large numbers of proteins produced by mitochondria
PLEASE HELP!!! Again no links please!
Answer:
1)A
2)D
3)C
5)B
I hope this helps:)
Answer:
1.) Hooke observed dead cells and concluded that cells are empty structures.
2.) Cytoplasm and other molecules could leak out of the cell.
3.) The cell could not synthesize proteins.
4.) The cytoplasm
5.) Muscle cells use a lot of ATP generated by mitochondria.
Explanation:
I took the test and all of these are correct! :D Hope this helps people i the future!
Which of the following correctly describes the 3rd stage of the cardiac cycle?
Answer:
c. the ventricles are relaxed and fill with blood is correct
Explanation:
A person has parents with high cholesterol. How will this impact the person's risk of developing a blood disease?
A. The person will have a higher risk for atherosclerosis regardless of his current or past lifestyle choices
B. The person will not have a higher risk for atherosclerosis if he has a healthy diet and exercises often
C. The person will have a higher risk for chronically low blood pressure regardless of his current or past lifestyle choices
D. The person will not have a higher risk for chronically low blood pressure if he has a healthy diet and exercises often
As per the observation, the correct answer is C. The person will have a higher risk for chronically low blood pressure regardless of his current or past lifestyle choices as it will impact the person's risk of developing a blood disease.
Even in case your LDL cholesterol and blood stress ranges are best mildly elevated, while they're each found in your frame, they could have interaction with every different to extra fast harm your blood vessels and your coronary heart.
What is the relationship between blood level and cholesterol?The hyperlink among excessive blood stress and excessive LDL cholesterol is going in each direction. When the frame cannot clean LDL cholesterol from the bloodstream, that extra LDL cholesterol can deposit alongside artery walls. When arteries emerge as stiff and slender from deposits, the coronary heart has to paintings extra time to pump blood via them.
Thus it is clear that cholesterol can affect the blood level that it can cause blood level.
To learn more about cholesterol refer to the link ;
https://brainly.com/question/841110
Answer:
A
Explanation:
35. Your body uses insulin to?
a help reduce blood sugar.
b. help increase blood sugar.
c. allow cells to take in glucose.
d. reduce homeostasis.
Answer:
C
Explanation:
Insulin is a hormone that helps control your body's blood sugar level and metabolism -- the process that turns the food you eat into energy. Your pancreas makes insulin and releases it into your bloodstream. Insulin helps your body use sugar for the energy it needs, and then store the rest.
Glucagon interacts with the liver to increase blood sugar, while insulin reduces blood sugar by helping the cells use glucose.
In the Bird Beak Gizmo, how did the bird beak depth change in drought conditions?
O No change
O Beaks got shorter beacuse the birds had to scrape more to find seeds.
Beaks got longer because the only birds that survived had larger beaks that could crack the hard seeds
Answer:
I think it would be #3, Beaks got longer because the only birds that survived had larger beaks that could crack the hard seeds
Explanation:
In years of extreme drought, the small, delicate seeds get eaten up quickly, leaving behind only the largest, toughest seeds.
Mitosis begins with a single parent cell and results in the formation of two unique (different) daughter cells, each with half of the
chromosomes from the parent cell.
True
False
An undersea volcano erupts, creating a new island in the Gulf of Mexico. Life slowly starts to appear on the island. What would probably be the first species to take hold and survive? Pls, explain your answer.
A. ferns C. lichens
b. finches d. grasses
Answer:
Lichens
Explanation:
Lichens are very mere grasses
They need very less oxygen
They can adopt in any situation just they need drops of water .
So they will start to hold and survive at first
All of these are attributed to deforestation EXCEPT:
A)
Less biodiversity
B)
A loss of soil nutrients
An increase in forested areas
D
An increase in greenhouse gases
Answer:
C
Explanation:
Deforestation is the process clearing large expanses of woodland; which destroys biodiversity, removes fertility in soil and increases greenhouse gases; but DECREASES the amount of forested areas. Hope this helps :D