Answer:
The low power objective lens is manipulated by turning the focusing knob on the microscope. This moves the lens up and down to focus the specimen. The microscope should be set on the low power objective lens and the image should be brought into focus by turning the focusing knob. Once the image is in focus, the higher power objective lenses can be used to further magnify the specimen.
How fast do you administer IV epinephrine in NRP?
It takes as fast as 45–60 seconds to provide the first dose of epinephrine with invasive neonatal resuscitation techniques like intubation or venous access. If the heart rate doesn't rise above 60 beats per minute after the initial dose, epinephrine can be given every 3 to 5 minutes.
Systematic evaluation of human infant and pertinent animal research comparing various epinephrine dosages, delivery methods, and delivery intervals in neonatal resuscitation to the (currently advised) intravenous (IV) administration of doses of 0.01 to 0.03 mg/kg given every 3 to 5 minutes. After being administered, epinephrine immediately starts to work. However, it can take 5–10 minutes for it to take full action.
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Write a claim evidence and reasoning on Do trees change the composition of the atmosphere around us?
Answer:
Evidence: Trees absorb carbon dioxide from the atmosphere during the process of photosynthesis, and release oxygen as a byproduct. In this way, trees play a vital role in the global carbon cycle, and can help to mitigate the negative impacts of human activities that contribute to the increase of atmospheric carbon dioxide, such as the burning of fossil fuels.
Reasoning: The evidence provided demonstrates that trees have a direct effect on the composition of the atmosphere through their role in the carbon cycle. By absorbing carbon dioxide and releasing oxygen, trees can help to balance the levels of these gases in the atmosphere, and contribute to the overall health of the planet. The fact that trees have this ability suggests that they have the power to change the composition of the atmosphere around us.
What are Mendel's 4 hypotheses and what does each mean?
(1) Principle of Paired Factors is the first of Mendel's four postulates and principles of heredity. (2) The Law of Segregation or Law of the Purity of Gametes (Mendel's First Law of Inheritance), (3) The Dominance Principle, and (4) The Law of Independent Assortment
In his law of segregation, he put forth the concept of paired components being separated during the creation of gametes. According to Mendelian law, every pair of unit components would separately assort into brand-new gametes.
Only one version of a trait will emerge in the offspring of two parents who have different, opposing characteristics, according to Mendel's law of dominance. The dominant trait will be the only phenotypic trait that the hybrid offspring exhibits. The dominance law is the fundamental rule of inheritance.
Because a gamete only contains one of the two alleles dominant or recessive and not both, the law of segregation is also known as the law of pure gametes.
The development of reproductive cells causes various genes to separately separate from one another, according to the Principle of Independent Assortment. During his research on the genetics of pea plants in 1865, Gregor Mendel made the first observation of an independent assortment of genes and their related phenotypes.
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Quorum-sensing contributes to the ability of bacterial colonies to congregate into nearly solid masses which act as barriers to effective decontamination and sterilization called:
Biofilms are formed when bacteria congregate into a nearly solid mass. This occurs when bacteria use quorum sensing to communicate with each other and create pathways for cells to attach to and form a matrix.
The matrix shields the cells from external forces and helps to protect the bacteria from antibiotics, desiccation, and extreme temperatures. Biofilms can form on just about any surface, including medical and surgical instruments, water pipes, and even on the surfaces of plants and animals.
The formation of biofilms makes it difficult to decontaminate and sterilize, since the bacteria are protected within the matrix and can withstand harsh chemicals and extreme temperatures. Biofilms are also highly resistant to antibiotics, making them difficult to eradicate.
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Approximately how many plant made pharmaceuticals are currently under different stages of discovery?
a.
100
b.
200
c.
300
d.
400
Nucleus plays an important role in cellular reproduction and cellular functions
It is true that nucleus plays an important role in cellular reproduction and cellular functions, but the reason given is not the correct explanation. The correct option is B.
What is nucleus?In terms of genomics, a nucleus is the organelle within a cell that is membrane-enclosed and houses the chromosomes.
In the nucleus is genetic material. The DNA in the cell is primarily necessary for both cellular reproduction and cellular activities.
Proteins and DNA make up chromosomes, which are found in the nucleus. The information needed to organise and build cells is contained in DNA molecules.
The functioning DNA segments are referred to as genes. It has been discovered that chromatin material in a cell that is not being dispersed contains some DNA.
Thus, the correct option is B.
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Your question seems incomplete, the complete question is:
Assertion- Nucleus plays an important role in cellular reproduction and cellular functions.
Reasons- Nucleus contains chromosomes which are made up of DNA which contain information for constructing and organising cells.
a) If both Assertion and Reason are the true and Reason is the correct explanation of Assertion.
b) If both Assertion and Reason are true but the Reason is not the correct explanation of Assertion.
c) If Assertion is true but Reason is false.
d) If assertion is false but Reason is true.
Read the paragraph from the section "A Library Of Life."
Sadye Paez is a leader on the project. Mapping the genome of tens of thousands of animals
could easily take 10 years, she said. Even so, giving scientists this kind of information could help
to save rare animals. It would give conservationists and biologists a new set of tools, she said.
How is Harris Lewin MOST likely to respond to this paragraph?
(A)
(B)
(C)
(D)
He would disagree that the project could take up to 10 years.
He would disagree that the project will help protect endangered animals.
He would agree that the project is worthwhile despite how long it will take to finish.
He would agree that the project will take too long to save many species.
'He would agree that the project is worthwhile despite how long it will take to finish' is Harris Lewin's most likely response to this paragraph.
What is a genome?
A genome is an organism's complete set of genetic material. It is made up of DNA and contains the instructions for an organism's growth, development, functioning, and reproduction. In humans, the genome consists of 23 pairs of chromosomes, containing a total of 3 billion base pairs of DNA.
He would agree because the information it provides is invaluable. Knowing the genome of tens of thousands of animals could help to save rare animals and give conservationists and biologists a new set of tools to work with. The potential benefit of this project makes it worth the effort and time it will take to complete.
Hence, Option C is correct.
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Cellulose could provide a widely available and cheap form of glucose, but humans cannot digest it. Why not
Cellulose could provide a widely available and cheap form of glucose, but humans cannot digest it due to the lack of the cellulase enzyme.
Cellulose is one of the most abundant organic compounds on Earth, making up the cell walls of plants. It is composed of glucose molecules linked together in a linear chain. This chain is very difficult for humans to digest, as our digestive system lacks the necessary enzymes to break down the bonds between the glucose molecules.
Cellulose is a complex carbohydrate, meaning it is composed of long chains of glucose molecules that are connected in a more intricate way than simple carbohydrates such as sucrose or fructose. This makes it more difficult for our digestive system to break down. Humans lack the enzyme called cellulase, which is necessary to break down the bonds between the glucose molecules in cellulose. Without this enzyme, our digestive system cannot access the glucose molecules in cellulose and therefore cannot use it as a source of energy.
Cellulose is not completely indigestible, however. Bacteria and some animals, such as cows and horses, are able to digest cellulose due to their possession of the cellulase enzyme. These animals are able to break down the bonds between the glucose molecules in cellulose and use the glucose as a source of energy.
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What increases genetic variance?
The factors like genetic mutations, random mating, gene flow and genetic drift can increase genetic variance.
Genetic variations are the changes which occur in the genetic sequence of the DNA. These genetic variations are necessary as they allow the living beings to evolve and eventually survive. There are some factors which cause an increase in the genetic variation and they are genetic mutations, random mating, gene flow and genetic drift.
A genetic mutation is an alteration in the DNA sequence of a particular gene which causes a different product to form. This helps increase the genetic variance in organisms. Gene flow is defined as the movement of genes in and out of a particular population. In-flow of genes can help increase the genetic variation of individuals in that population. Genetic drift is the change in allelic frequency in a population by chance. Random mating is the mating of individuals that is not especially dictated by any social or genetic preference and leads to an increase in variation.
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The _____ of the respiratory system consists of a series of interconnecting cavities and tubes both outside and within the lungs that filter, warm, and moisten air and conduct air into the lungs.
The conducting zone of the respiratory system is a series of interconnected cavities and tubes outside and inside the lungs that filter, warm, humidify, and direct air to the lungs.
The respiratory system functionally he can be divided into two zones. The conducting zone (nose to bronchioles) provides the conduction pathway for inspired gases and the respiratory zone (alveolar ducts to alveoli) where gas exchange takes place.
The conducting zone consists of all structures that allow airways to enter and exit the lungs.
Nasal cavity, pharynx, trachea, bronchi, and most bronchioli. The conducting zone, which includes everything from the nose to the smallest bronchiole, allows air to enter and exit the lungs. The respiratory zone includes respiratory bronchioles and alveoli, which move breathing gases, oxygen and carbon dioxide, into and out of the blood.
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When a large percentage of the population have detached homes with yards in highly urban areas, the presence of sprawl is nearly inevitable. True False
False, One of the global difficulties confronting spatial development planning in recent years has been urban sprawl, defined as low-density, uncontrolled, limitless, and intermittent physical expansion into suburban areas.
Controlling two major elements, "population growth" and "per capita land consumption," is central to most of the work on urban sprawl. This study is to propose a comprehensive framework for dealing with this phenomenon emphasizing the case study of Shiraz Metropolitan Area (SMA) in Iran through identifying the drivers stimulating these two factors.
Spatial analytics, mathematical and statistical approaches such as Holder analysis, path analysis, and other statistical analyses were used in the analyses.
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How do we know a particular lineage of prokaryote exists in a natural habitat without first isolating and growing it in laboratory culture
The use of DNA-based techniques is one way to ascertain whether a certain lineage of prokaryote occurs in a natural habitat without first isolating and cultivating it in laboratory culture.
These methods allow researchers to identify species of prokaryotes without having to isolate and grow them in culture. The most common DNA-based method is called PCR (polymerase chain reaction) which is used to amplify and detect the presence of specific DNA sequences in a sample. By designing primers specific to a particular prokaryote, researchers can determine if the organism is present in a given sample, even if it is present in very small amounts.
Other methods such as denaturing gradient gel electrophoresis (DGGE) and 16s rRNA gene sequencing can also be used to identify different species of prokaryotes in a sample. These methods allow researchers to determine if a particular lineage of prokaryote exists in a natural habitat without having to isolate and grow it in laboratory culture.
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What are the non-living component of an ecoytemPick the non-living component of an ecoytem from the provided choice. Producer
Conumer
Herbivore
Air
? The non-living component of an ecoytem are factor
1. The non-living component of an ecosystem is the air.
Thus, the correct answer is D.
2. The factor of non-living component of an ecosystem is an abiotic factor.
In ecology, biotic аnd аbiotic fаctors mаke up аn ecosystem. Biotic fаctors аre the living pаrts of the ecosystem, such аs plаnts, аnimаls, аnd bаcteriа. Аbiotic fаctors аre the nonliving pаrts of the environment, such аs аir, minerаls, temperаture, аnd sunlight.
The non-living, physicаl feаtures of the environment аre cаlled аbiotic fаctors. The prefix а meаns “not.” The term аbiotic meаns “not living.” Аbiotic fаctors include аir, wаter, soil, sunlight, temperаture, аnd climаte. The аbiotic fаctors in аn environment often determine which kinds of orgаnisms cаn live there.
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What happens to the molecules of a compound when it changes from a liquid to a solid?
When the compound changes from a liquid to a solid, the molecules lose their energy, they slow down and thus come together and closer.
Solid is one of the states of matter where the molecules or atoms of a compound stay close together in contact with each other and are not able to perform any movement. The kinetic energy of these molecules is very less and such compounds have a structural integrity.
Energy is defined as the capacity to do work or supply heat to any body. In any compound, the energy is stores in its chemical bonds. The transition of molecules from a less ordered state to a more ordered state results in the release of energy from the compound.
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Is the claim, "Despite not being a plant, you get your energy from the sun." accurate?
Write a paragraph explaining your reasoning.
Answer:
Yes (kind of), because even though we do not use the sun as directly as say plants, we still rely on the sun on a daily basis, however we don't necessarily get our energy from it, like plants do.
The sun produces light as well as heat, also known as solar energy. This makes it possible for life to exist on Earth, and we can use solar energy to power a wide variety of useful things, however sun/solar energy is not the only way to get electricity.
As we know, plants need sunlight to grow, although humans don't grow by being exposed to sunlight, sunlight helps grow plants which animals, including humans, need for food as well as oxygen they produce.
Most livestock we eat, cows for example, need plants to survive and many people eat meat, and even if you don't you'd eat plants which, once again, need sunlight to grow. Also, without heat from the sun, Earth would freeze.
OVERALL...
It's kind of like a chain, we get our energy from things that get their energy directly from sunlight. A short answer would be yes, but it's not quite as simple as that.
I hope this helps, hopefully you can use it to formulate an answer of some sort.
A deep indentation found along the medial plane that separates the right and left cerebral hemispheres is called the
The profound depression that partitions the two cerebral sides of the equator is known as the extraordinary longitudinal crevice. This depression partitions the frontal cortex into left and right parts along the longitudinal or sagittal plane.
It is partitioned into two sides of the equator, to be specific the right cerebral half of the globe and the left cerebral side of the equator. The profound space that isolates the two sides of the equator is known as a longitudinal crevice.
The average surface of the cerebral side of the equator is partitioned into internal and external zones by the cingulate sulcus. The internal zone is named as cingulate gyrus and is consistent with the para-hippocampal gyrus on the tentorial surface through the isthmus (5, 7).
The falx cerebri is a meningeal projection of dura in the cerebrum. It is a sickle-molded overlap of the dura mater situated at the midline between the two cerebral sides of the equator.
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How is ATP formed from electron?
ATP is formed from electrons through the process of oxidative phosphorylation.
Oxidative phosphorylation is the process by which the energy released from the oxidation of nutrients is used to produce ATP. The process occurs in the mitochondria, where electrons from the breakdown of glucose are passed through a series of protein complexes in the inner mitochondrial membrane, called the electron transport chain. As the electrons pass through these complexes, they lose energy, which is used to pump protons across the inner mitochondrial membrane, creating a proton gradient. The energy from this gradient is then used by ATP synthase, an enzyme located in the inner mitochondrial membrane, to add a phosphate group to ADP (adenosine diphosphate), forming ATP. In this way, the energy from the oxidation of glucose is harnessed to produce ATP, the energy currency of the cell.
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Which Process occuaring in plants provides energey to other organisams in the ecosystem?
Photosynthesis
Plants turn water, sunlight, and CO2 into carbon compounds.
Question 1 of 10
What about Earth allows it to maintain bodies of water?
OA. Strong magnetic field
OB. Strong gravity
O C. Lunar tides
OD. Plate movements
Claim 1: The sediment that formed the Great Plains came from the rock of the Rocky Mountains. Claim 2: The magma that formed the Rocky Mountains came from the rock of the Great Plains. Which claim is wrong Give evidence to refute/disprove the other claim
Claim 1: The debris that shaped the Great Plains originated from the igneous material of the Rocky Mountains. (correct)
Claim 2: The magma that produced the Rocky Mountains originated from the Great Plains' rocks. (incorrect)
Great Plains vs Rocky MountainsThe Great Plains were formed by sediment from the Rocky Mountains being transported and deposited by rivers and other geological processes. The sedimentary rock that makes up the Great Plains includes materials such as sand, silt, and clay that were worn down from the uplifted Rocky Mountains and carried eastward by streams and rivers.
The Rocky Mountains were formed by tectonic activity that caused the Earth's crust to uplift and create the mountain range. The mountains are primarily composed of igneous and metamorphic rock that formed deep within the Earth's crust, rather than from the sedimentary rock of the Great Plains.
There is no evidence that supports claim 2, the magma that formed the Rocky Mountains did not come from the rock of the Great Plains. The magma that formed the Rocky Mountains came from the Earth's mantle, which is beneath the crust and is composed of mostly solid rock. The Great Plains being sedimentary rock, formed from erosion and weathering of pre-existing rock.
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A condyle differs from an epicondyle in that the condyle ______. A) is often flat, whereas an epicondyle is round. B) is an attachment site for muscle
A condyle differs from an epicondyle in that the condyle helps form a joint. So the correct option is C.
Condyle and Epicondyle both refer to the part of long bones in animals. The smooth surface at the end of the bone which helps in the formation of a joint is called condyle however,
The Epicondyle is a rounded protuberance at the end of a bone which facilitates the attachment of ligaments, muscles and tendons.
Where condyle forms a smooth surface, epicondyle usually leads to rough projections.
Medial and lateral condyle are some examples for former while medial and lateral condyle of femur and humerus are some examples of epicondyle structure in bone.
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Full question: A condyle differs from an epicondyle in that the condyle ________
A) helps form a joint.
B) is a raised area above a joint.
C) is often flat, whereas an epicondyle is round. D) is an attachment site for muscles.
Why is a male progeny with a calico coat so rare?
For a male cat to have the calico pattern, the cat must have three sex chromosomes. Two X's and one Y's. This phenomenon can occur in both humans and animals, and in both cases is known as Klinefelter's syndrome.
The calico fur pattern is predominantly white, with other her two colored spots. Also, since a cat's coat color is linked to her X chromosome in her cells, calico cats rarely become male. Male cells acquire only one X chromosome. That is, males usually only have one color. Out of 3,000 calico cats born, only one is male. These cats are so rare that they are often referred to as feline "unicorns."
There is no locus for orange on the Y chromosome, so a normal XY male of his cannot have both orange and non-orange genes, usually resulting in tortoiseshell or calico .
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Where does the light reaction occur in plants?
The light reactions of plants are the photochemical reactions that take place in the thylakoid membrane of chloroplasts and convert light energy into chemical energy in the form of ATP and NADPH.
Light reactions in plants occur in the thylakoid membranes of organelles referred to as chloroplasts. The light processes are mostly controlled by photosystems, sizable complexes of proteins and pigments (light-absorbing molecules) that are designed to capture light. The light reactions processes include the plants division of water into oxygen, protons, and electrons, and take place in the chloroplast thylakoid membrane. The light reactions occur in the chloroplast thylakoid membrane and involve the splitting of water into oxygen, plants,protons and electrons.
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What are the conclusion from Mendelian experiment?
Mendel gathered his data for tens of thousands of plants before coming to the conclusion that the traits might be divided into expressed and latent features. These traits were described by him as being dominant and recessive, respectively. In a hybridization, dominant features are those that are passed on unaltered.
The three laws of dominance, independent assortment, and segregation serve as a summary of all the findings of Mendel's experiment. He proposed that each gene be passed down to the organisms twice, once from each parent. In their gametes, organisms only share one copy of each gene. In his opinion, traits are discretely inherited from each parent, one at a time.
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How are weather and climate the same? How are they different? ¿En qué se parecen el tiempo y el clima? ¿En qué se diferencian?
Answer:
They are the same because they both talk about atmospheric conditions like precipitation, temperature, amount of sun, etc. They are different because weather talks about short-term changes in the atmosphere while climate describes weather over a long period of time in a certain area. Different regions can have different climates and or weathers.
During which stage of the cell cycle does the cell condense chromosomes and break down the nuclear envelope? anaphase prophase metaphase telophase
During prophase of the cell cycle, the cell condenses its chromosomes and breaks down the nuclear envelope.
A cell cycle, also known as a cell-division cycle is defined as a series of events which take place in a cell as it is growing and dividing in order to form two daughter cells. A cell cycle has a few different stages namely prophase, metaphase, anaphase and telophase.
Prophase is the first stage of both mitosis as well as meiosis. In the prophase, the chromatin which is present in the cell is condensed in order to form chromosomes. The nuclear envelope, which is the membrane which surrounds the nucleus of the cells also starts breaking done.
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The following metabolic pathway involves the action of many enzymes within a cell.
Substrate 1 --> Substrate 2 --> Substrate 3 --> Product
Explain what would happen to the amount of product produced if the enzyme that acts on substrate 2 was not produced in the cell. All other enzymes at each step of the pathway are present.
Answer:
The metabolic pathway you described involves a series of chemical reactions that convert one substrate into the next substrate until the final product is formed. If the enzyme that acts on substrate 2 is not produced within the cell, the reaction that converts substrate 1 into substrate 2 would not occur. This would cause a block in the pathway, as substrate 2 would not be available for the enzyme that converts substrate 2 into substrate 3.
Explanation:
The metabolic pathway you described involves a series of chemical reactions that convert one substrate into the next substrate until the final product is formed. If the enzyme that acts on substrate 2 is not produced within the cell, the reaction that converts substrate 1 into substrate 2 would not occur. This would cause a block in the pathway, as substrate 2 would not be available for the enzyme that converts substrate 2 into substrate 3.
As a result, the amount of product produced would be severely decreased. Because of the missing enzyme, substrate 2 would not be converted into substrate 3, and subsequently, substrate 3 would not be converted into the final product. If this key enzyme is not present, the entire metabolic pathway would be halted at the step involving substrate 2, causing the cells to be unable to produce the final product and creating a bottleneck in the metabolic pathway.
It's important to remember that enzymes are catalysts, they speed up the reactions of the metabolic pathway and ensure the reactions occur at appropriate rates to support life, even a small change in the enzyme activity can affect the entire pathway and alter the final product quantity and quality.
In the evolution of life on Earth, which one of the following traits must have evolved last (meaning most recently): O sexual reproduction; centromeres associated with DNA; O self-defense mechanisms; multicellularity; O locomotion; mitosis.
Pertaining to sexual reproduction. DNA mitosis, self-defense mechanisms, and multicellularity are all associated with centromeres.
What precisely is reproduction?The process of creating offspring is called reproduction. The two basic types of reproduction are sexual and asexual. An creature that reproduces sexually is extremely varied and carries the genetic material of its two grandparents. Asexual reproduction, which involves each parent reproducing themselves, results in children that are genetically identical.
Explain it the action of procreating?The process of creating new members of same species is called reproduction. An organism has two ways of reproducing: asexually and sexually. Merging both male and female gametes is not considered an instance of asexual reproduction. Bacteria, amoebas, and other amoeba exhibit this.
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Many scientists claim that the synthesis of the first organic molecules from inorganic precursors was possible because of the highly reducing atmosphere found on primitive Earth. Which of the following is an appropriate null hypothesis that could be used when investigating the claim
An appropriate null hypothesis that might be used to test the claim is that the synthesis of organic molecules from inorganic molecules is conceivable both at the levels of atmospheric oxygen present today and on early Earth.
When investigating the possibility that life may have started on the planet, it is vital to take into account the concept that organic molecules can be created from inorganic ones both under conditions of current atmospheric oxygen levels and those present on primitive Earth.
In order to more thoroughly investigate the potential of life's genesis on Earth, this null hypothesis offers evidence that organic molecules can arise without the presence of life.
We can learn more about the many chemical processes and reactions used to create organic molecules by looking at them.
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Select the correct labels for the parts of this atom. ( Part a: Part b: Part c:
ions
proton
neutron
electron
nucleus
The parts of atoms include:
a - protonb - electronc - neutronHow do atoms work?An atom is made up of a central nucleus and one or more negatively charged electrons. The nucleus is positively charged and contains one or more protons and neutrons, which are relatively heavy particles. Atoms are the fundamental constituents of matter.
Protons are made up of two up quarks and one down quark. Neutrons are made up of one up quark and two down quarks. The "strong nuclear force," one of the four fundamental forces, holds the nucleus together.
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