Modifications to chromatin can affect transcriptional activity by changing the accessibility of DNA to the transcription machineryProkaryotic gene regulation:
Chromatin is the complicated genomic DNA with proteins referred to as histones, where every histone-bound DNA molecule is called a chromosome. but, chromatin now not handiest compacts the genome into the nucleus, but is also the mechanism controlling how the genome is examined from cellular to cell.
When the cell isn't dividing, the strands of DNA are known as chromatin and in mitosis after replication, the chromosomes have two chromatids. Chromatin is the indistinguishable mass of DNA molecules whereas chromatids are part of chromosomes connected to it with a centromere.
Chromatin fibers are coiled and condensed to shape chromosomes. Chromatin makes it feasible for some mobile processes to occur such as DNA replication, transcription, DNA repair, genetic recombination, and mobile department. humans regularly confuse these three phrases: chromatin, chromosome, and chromatid.
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Which type of stem cells have the ability to become any other type of body cell?
Answer:
Embryonic Stem Cells (ESCs)
Explanation:
Mutalistic microorganisms in the gut are the most critical for the mammals that consume.
Mutualistic microorganisms in the gut are the most critical for the mammals that consume dairy and lactose containing foods.
Mutualistic microorganisms are those that live in the body of an organism and provide some kind of benefit to that organism. In return the organism provides the microorganism with shelter and food. For example, E. coli is the gut bacteria that helps in digestion of lactose in mammals.
Lactose is a carbohydrate. It is particularly a disaccharide formed by the bonding between galactose and glucose subunits. It is present in milk and milk-related products such as cheese, cream, etc. Some people are not able to digest lactose in there body, a condition called lactose intolerance.
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Whats the fate of pyruvate after its produced during glycolysis?
The fate of pyruvate depends upon the availability of oxygen after glycolysis. In the presence of oxygen, pyruvate enters the mitochondria to generate reducing equivalents in the form of NADH and FADH2. And in the absence of oxygen, pyruvate exhibits fermentation.
Glycolysis is the process in which the breakdown of glucose into pyruvate occurs. This process occurs in the cytoplasm of all the cells and does not require oxygen. Glycolysis is a 10 step process where there is a net gain of 2 ATPs.
Fermentation is the process that occurs in anaerobic condition. It also happens in the cytoplasm of the cell. The products of fermentation can be either lactic acid or ethanol.
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What is the name for the chemicals that flood your body during periods of great stress, when your body becomes cortisol resistant and can cause damage to healthy cells if there is a storm of them?.
Cortisol is a chemical substance that causes stress in the body.
Cortisol, a major stress hormone, increases the level of sugar (glucose) in the bloodstream, improves the brain's use of glucose, and increases the availability of substances for tissue repair. Cortisol also dampens irrelevant or harmful functions in fight-or-flight situations.
Stress hormones include not only Cortisol which is the main human stress hormone but alsoCatecholamines such as adrenaline and noradrenaline. Vasopressin. Your body constantly produces tears to protect your eyes from irritation and keep them moist. If emotions cause you to cry, your tears contain additional ingredients. Cortisol is a stress hormone. Prolonged crying can wash away stressors.
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which term describes the tertiary structural organization of chromosomal dna that allows the long strand to be packed and fit into the cytoplasm of the cell? double helix telomere base pairing supercoiling centromere
Supercoiling term describes the tertiary structural organization of chromosomal dna that allows the long strand to be packed and fit into the cytoplasm of the cell
What does supercoiling mean?A higher-order DNA structure is described by DNA supercoiling. Two complimentary strands are wound around one another and around a shared helical axis to form the double-helical structure of DNA.Supercoiling happens when the molecule twists around itself to release the helical stress. Positive supercoiling results from overtwisting, whereas negative supercoiling results from undertwisting. In a circular model, twist can be changed by severing the circle, over- or undertwisting, and then re-connecting the ends.Small intranucleosomal DNA loops arise in conjunction with RNA polymerase II (Pol II) transcription through chromatin. DNA supercoiling builds up when Pol II is trapped inside a tiny loop,To learn more about Supercoiling refer to:
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most bony fish are or cold-blooded, with the exception of the tuna and mackerel shark family, which are , or warm-blooded.
Most fish are cold-blooded, but tunas and some sharks (such as white sharks) keep their exercising muscles warmer than the surrounding water. Because bony and cartilaginous fishes diverged as long as 450 million years ago, this ability is a remarkable example of convergent evolution.
Osteichthyes, also known as bony fish, is a diverse taxonomic group of fish with skeletons primarily made of bone tissue. They are distinguished from the Chondrichthyes by their cartilage-based skeletons. Bony fish include sunfish, bass, catfish, trout, and pike, as well as freshwater tropical fish found in aquariums. Tuna is another bony fish species.
Chondrichthyes is a class of cartilaginous fishes, which have skeletons made primarily of cartilage. They differ from the Osteichthyes, or bony fishes, which have skeletons made mostly of bone tissue. The cartilaginous fish are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and cartilage skeletons rather than bone skeletons.
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The cell membrane is composed of a phospholipid bilayer containing proteins and carbohydrates. Choose three of the statements that accurately reflect the structure and its function.
Answer:The cell membrane is composed of a phospholipid bilayer containing proteins and carbohydrates. Choose ALL of the statements that accurately reflect the structure and its function. 1. Membrane proteins may be enzymes to catalyze metabolic reactions within the cell. 2. Membrane proteins may contain cholesterol to serve as identification tags for other cells. 3. Channel proteins allow a specific molecule to cross the cell membrane that is unable to cross the phospholipid bilayer unassisted. 4. Receptor proteins bind to ligands, initiating cell signaling pathways. 5. Molecules that are large or nonpolar must use membrane proteins for transport
what is the function of the retinal pigmented epithelium? provide nutrients and oxygen to the retina. provide nutrients and oxygen to the lens and cornea. absorb light that enters the eye. secrete vitreous humor. secrete aqueous humor.
The human retinal pigment epithelium (H-RPE) consists of pigmented cells located between the neuroretina and the choroids. The H-RPE is produced from hexagonal cells organized into a monolayer that is densely full of pigment granules.
The retinal pigment epithelium is a fundamental aspect of the retina that performs essential roles in visible features. harm to the shape and characteristic of the retinal pigment epithelium ends in the diffusion of retinopathies, and there may be currently no healing remedy for these disorders.
The human retinal pigment epithelium (H-RPE) includes pigmented cells located among the neuroretina and the choroids. The H-RPE is constituted of hexagonal cells organized into a monolayer that is densely filled with pigment granules.
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45 points for this.
Multiple parts
Answer:
evaporation, condensation, cloud formation, precipitation
The difference between the smooth and rough er is the _______ that are attached to the outside of the ________ er.
Difference between smooth and the rough end of plastic reticulated is that ribosomes are attached to the outside of the rough ER
What is the difference between rough and smooth ER?The difference between rough ER and smooth ER is the presence of ribosomes. When ribosomes attach to the surface of an ER then it gives a rough appearance and hence it is called Rough ER. Smooth ER does not have ribosomes on its surface but is attached to its membrane.
The endoplasmic reticulum can either be smooth or rough, but its function is to produce proteins for the rest of the cell to function. The rough ER has ribosomes, which are small and round organelles whose function it is to make those proteins. Function of smooth ER is the synthesis of lipids, steroids and carbohydrates.
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In the reactions of photosynthesis, simple sugar molecules are manufactured in the.
In the reactions of photosynthesis, simple sugar molecules are manufactured in the chloroplasts.
Plants utilize carbon dioxide and water to convert them into energy and oxygen. As a result, the water turns into oxygen and carbon dioxide into glucose. After storing energy in the glucose molecules, the plant releases the oxygen back into the atmosphere.
Chlorophyll
The purpose of the microscopic organelles called chloroplasts, which are found inside plant cells, is to store sunlight energy. Plants are green because of chlorophyll, a pigment that absorbs light and is located in the thylakoid membranes of the chloroplast. During photosynthesis, chlorophyll absorbs energy from blue and red light waves while reflecting green light waves, providing the impression that the plant is green.
The two main stages of photosynthesis are light-dependent reactions and light-independent reactions, despite the fact that there are many other steps. As suggested by its name, the light-dependent reaction takes place inside the thylakoid membrane and requires a steady stream of sunlight. Chlorophyll absorbs the energy of the light rays and converts it into chemical energy in the form of the molecules ATP and NADPH. The light-independent reaction is a stage of the Calvin Cycle that doesn't require light and occurs in the stroma or area between the chloroplast and thylakoid membranes.
Using the energy from the ATP and NADPH molecules, carbon dioxide is transformed into carbohydrates like glucose during this phase.
C3 and C4 are used in photosynthesis. Not all forms of photosynthesis, though, are created equal. Two of the numerous types of photosynthesis are C3 and C4 photosynthesis. C3 photosynthesis is used by most plants. It involves the Calvin Cycle creating the three-carbon molecule 3-phosphoglyceric acid, which later turns into glucose. The Calvin Cycle, on the other hand, causes a four-carbon intermediate product produced by C4 photosynthesis to break down into carbon dioxide and a three-carbon molecule. The advantage of C4 photosynthesis is that it produces larger levels of carbon, allowing plants to thrive in environments with little water or light.
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In a body of water, a fish remains at a constant depth while motionless. In the same body of water, a person sinks while motionless. Why? more than one answer may be true.
A person sinks in a water body while a fish does not because the person has a higher density than the water, the fish displaces less water and also it has less volume, and it has a lesser density than the water.
A fish stays immobile at the same depth in a body of water. A person sinks in the same body of water while not moving. The idea has to do with mass, density, and volume. As a result of having a higher mass and volume than water, a person has a higher density than a fish because the latter displaces less water than the former. A person also has a higher mass than a fish. Therefore, option A, B, D, and E are correct. The mass per unit volume formula is used to compute density. It is described as the total mass that a body contains in relation to its volume. It can be represented as:
Density = mass/volume
This is consistent with the fact that fish have streamlined bodies in addition to their bodies not having any. Human bodies are not streamlined. In addition to its air bladder, a fish has gills that allow it to breathe underwater. This allows fish to survive.
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Complete question is:
In a body of water, a fish remains at a constant depth while motionless. In the same body of water, a person sinks while motionless. Why? more than one answer may be true.
Group of answer choices
The person has higher density than the water.
The fish displaces less water than the person.
The fish has a lower density than a person.
The fish has less volume than the water it displaces.
The person has more mass than the fish.
The fish has lower density than the water.
The person has more volume than the fish.
would any populations begin to thrive?
Answer:Global population growth and the destructive consumption habits of high-wealth countries put pressure on biodiversity and human communities, exacerbating food and water shortages, reducing resilience in the face of climate change, and making it harder for vulnerable groups to rise out of intergenerational poverty.
Explanation:
The Center has been working to address the connection between human population pressure and the extinction crisis since 2009. Our innovative campaigns focus on commonsense solutions such as gender empowerment, the education of all people, universal access to all forms of sexual and reproductive healthcare, sustainable and equitable lifestyle choices, an economy that doesn’t rely on endless growth, and a societal commitment to improve living conditions for all species.
demonstrate that change in heat causes change in temperature
Answer:
When a system absorbs or loses heat, the average kinetic energy of the molecules will change. Thus, heat transfer results in a change in the system's temperature as long as the system is not undergoing a phase change.
what percentage of the resulting offspring will possess a heterozygous genotype?
100 percent
75 percent
50 percent
25 percent
Answer 50%:
Probably, a 50 percent chance
Explanation:
The Punnett square below makes it very clear that at each birth there will be a 25% chance that you having a normal homozygous (AA) child, a 50% chance of a very healthy heterozygous (Aa) carrier child like you and your mate, and a 25% chance that a homozygous recessive (aa) child who could probably will eventually die from this
" I hoped I helped you : - ) "
in which way does the b-cell population that participates in a secondary adaptive immune response differ from the b-cell population that participates in a primary adaptive immune response?
Answer: a. Antigen-specific B cells in a secondary response outnumber those in a primary response by 10- to 100- fold.
Explanation:
In a secondary reaction, the number of antigen-specific B cells is 10- to 100-fold greater than in a first response.
What is antigen?Antigen is defined as a substance that triggers the creation of antibodies and elicits an immunological response. This indicates that your immune system is attempting to combat the chemical because it does not recognize it. A substance from the environment, such as chemicals, germs, viruses, or pollen, can behave as an antigen.
The primary immune response happens in response to the first interaction with the antigen, whereas the secondary immune response happens in response to the second and subsequent exposure to the same antigen.
Thus, in a secondary reaction, the number of antigen-specific B cells is 10- to 100-fold greater than in a first response.
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What is the difference in the concentration of molecules in two areas across a membrane.
Answer: For cell transport, diffusion is the movement of small molecules across the cell membrane. The difference in the concentrations of the molecules in the two areas is called the concentration gradient.
Explanation:
What is the formula for density? Responses
Answer:
Ρ = m/V
Explanation:
have a wonderful day
Explanation:
Density = Mass divided by volume
If you were measuring the rate of reaction of cellobiase isolated from termite gut, what might happen if you:
Increase amounts of enzyme (cellobiase):
Increase amounts of substrate (cellobiose):
If we Increase amounts of enzyme(cellobiase), then the rate of reaction increases and if we increase amounts of the substrate then not all enzymes function under the same environmental conditions.
The process of converting cellulose, a substance found in plant cell walls and made up of long, bunched chains of glucose, to glucose is completed by the enzyme cellobiase.
If the concentration of the substrate, in this example the cellobiose specified in the question, is increased, the rate of reaction increases to a maximum value and then levels out. This is because all of the active sides of the enzyme finally become saturated by the substrate.
This is due to the fact that more substrate molecules will interact with enzyme molecules, producing more products. As the substrate concentration increases, the enzyme gets saturated with substrate.
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when collecting a specimen for blood culture, some blood is placed into an aerobic bottle and will be exposed to a(n):
Some blood is put into an aerobic container after blood collection so that it can be exposed to an oxygen-free environment.
What is specimen ?An individual specimen of a species or kind of an animal, plant, mineral, etc., used for scientific analysis or presentation. a specimen used for medical testing, most often urine. The words example, case, illustration, instance, & sample are some frequent synonyms for specimen. The definition of "anything that demonstrates distinguishing traits in its category" is shared by all of these words, however the word "specimen" refers to almost any example or sample, whether it be representative or simply existent and available.
What is specimen in medical term and what are its types ?(Byopse Speh-men) bodily tissue that has been taken out and inspected under such a microscope to check for illness. Serum, virology swabs specimens, biopsy and involved or affected tissue, cerebrospinal fluid for PCR, urine samples, and tissue from necropsies are the biological sample types that are commonly accepted in clinical laboratories. To ensure efficient laboratory processing, these are collected in specialized containers. A holotype is a single specimen that has been specifically named by the species' first author as the "type" that bears the name. When the authors has not chosen a single holotype, a syntype is one of multiple specimens inside a series with equal rank that are utilized to characterize the new species.
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a patient was diagnosed to possess a mutation in an er-resident protein in which the er-signal sequences of the protein were inappropriately deleted and instead replaced with a mannose-6-phosphate during protein synthesis and posttranslational modification. what is the likely fate of this mutant protein?
The protein would be directed to lysosomes, secreted by exocytosis, and wouldn't be glycosylated. It would also never enter the Golgi complex.
What Is a Protein?
The body is made up of protein, which may be found in almost every organ, tissue, and body part, including muscle, bone, skin, and hair. It contributes to the production of hemoglobin, which carries oxygen in the blood, and enzymes, which conduct important biochemical reactions.
What is the real benefit of consuming protein?
Your muscles' primary building material is protein. Therefore, eating enough protein will help you keep your muscle strength and encourage strength growth when you engage in strength exercise. Eating a lot of protein can help build muscle mass and strength, as according numerous studies.
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what environment stimulates evolution of drug-resistant pathogens?
The presence of an enzyme called penicillinase results in drug-resistant pathogens.
What causes drug-resistant pathogens?
Misuse and overuse of antimicrobials are the main drivers in the development of drug-resistant pathogens.
What is the function of penicillinase?
A bacterial strain exposed to penicillin may produce an extracellular enzyme called penicillinase which leaves the bacterial cell and degrades the penicillin around it by hydrolyzing the cyclic amide bond in the beta-lactam ring of penicillin and thus inactivates the antibiotic.
Thus, the presence of the enzyme penicillinase results in drug-resistant pathogens.
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Explain why it may have been difficult to discover pond water organisms from pond water sample under the microscope comparing to cheek cell sample and leaf sample?
It may have been difficult to discover pond water organisms from pond water sample under the microscope comparing to cheek cell sample and leaf sample because of the large area and involved and the cheek cell and leaf sample being a living tissue.
What is a Microscope?This is referred to as a laboratory equipment which is used in the enlargement of objects and cells and ensures that very small organisms can be seen and observed.
Living cells such as cheek cell and leaf sample are what the organisms mostly feed on which is why it is easy to see and observe them when compared to pond water.
Pond water also has a very large surface area and the sample gotten may not possess any organism which is why it may be difficult and is therefore the reason why it was chosen as the correct choice.
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How is energy transferred from a plant to a person?
I need this right now, please. Whoever answers first I'll mark the brainiest.
Answer:Through the food chain
If pacific field male crickets in hawaii attract females by rubbing their wings together to sing, why is it that in some places up to 90% of the males no longer sing? how could this have evolved?.
If pacific field male crickets in Hawaii attract females by rubbing their wings together to sing, HMS Beagle.
Male crickets have shorter, sturdier wings with hard underside surfaces called a record. The pinnacle of the wing has a formation known as a scraper. To make his chirping tune, the male rubs the scraper of 1 wing in opposition to the file on the bottom of the other.
Even though both men and women have two cerci, the simplest women have an ovipositor. it can appear like third cerci, or appear to be an extraordinary length. lady crickets use this organ to put eggs into the soil. best male crickets chirp—they do that to attract a lady mate
.
Male crickets are the communicators of the species. The girls watch for the songs of the males to spur on the mating ritual. girl crickets do not chirp. males make a chirping sound by using rubbing the edges of their forewings collectively to name lady friends. This rubbing together is referred to as stridulation.
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Atherosclerosis is simply the acculation of lipods within the artery.
a. True
b. False
The given statement is (b) False i.e. Atherosclerosis is simply the accusation of lipids within the artery.
The buildup of lipids and fibrous components in the major arteries is a hallmark of the degenerative illness known as atherosclerosis.A pattern of the disease known as arteriosclerosis called atherosclerosis occurs when lesions begin to form on the arterial wall. Because plaque has accumulated due to these lesions, narrowing may result. Usually, there are no symptoms at first.Atherosclerosis is a chronic condition that goes years without showing any symptoms. Stable and unstable atherosclerotic lesions are the two main classifications of atherosclerotic plaques (also called vulnerable).Atherosclerosis steadily takes hold when plaque is formed in your blood by cholesterol, fat, blood cells, and other elements. Your arteries narrow as a result of plaque buildup. As a result, the body's essential organs receive less blood that is oxygen-rich. a healthy artery and a plaque-filled artery.
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which of the following would best characterize the organisms that inhabit the biome? responses habitat specialists would be most abundant, because they have broad niches. habitat specialists would be most abundant, because they have broad niches. generalists would be most abundant, because the resources available would be constantly changing. generalists would be most abundant, because the resources available would be constantly changing. generalists that feed only on animals would be more abundant in the summer months, while generalists that feed only on plants would be more abundant in the winter months. generalists that feed only on animals would be more abundant in the summer months, while generalists that feed only on plants would be more abundant in the winter months. specialists that live in trees would be more abundant in the summer months, whereas specialists that live in caves would be more abundant in the winter months.
Generalists would be most abundant, because the resources available would be constantly changing.
What is a biome?A biome often referred to as a major life zone, is a region with populations of plants and animals that have evolved together to survive in that specific environment. It is the largest global biotic unit and contains a number of communities with names derived from the dominating geographical characteristics of the area, such as grasslands, deserts, or woods. We can determine the type of life that exists in a biome by looking at factors such as temperature, soil, and water.
Terrestrial, freshwater, and marine biomes are the three categories into which biomes can be divided. Grasslands, deserts, and tropical woods are all examples of terrestrial biomes. Polar freshwaters, sizable lakes, tropical and subtropical coastal rivers, temperate coastal rivers, and many more are examples of freshwater biomes. Continental shelves, tropical coral, and kelp forests are examples of marine biomes.
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Since the resources at hand will be continually shifting, generalists would be in great supply.
What two key variables would be the most reliable indicators of the population's standard of living?A population's capacity for expansion is greatest when a sizable portion of its members are in the pre-reproductive and reproductive cohorts. The two most crucial indicators for assessing a nation's general health are infant mortality and life expectancy.
What three qualities do a biome possess?Biomes. An place is categorized as having a certain biome based on the species that inhabit it. Scientists can identify a biome by defining the range of temperatures, the kind of soil, the amount of light, and the amount of water that are distinctive to that location. These factors create niches for particular species.
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STEP 2
To the side, there are several pictures of materials. Choose the materials that you think will
best model the cells and how they are connected. Construct a model of each tissue using the
pictures. You will want to duplicate (ctrl+D) the picture several times to create your model.
Create the models in the space below.
Tissue in skin
Tissue in heart
The cells are connected to each other by cell-cell adhesions.
The majority of the mechanical loads are carried by the cell-cell adhesions, which hold the cells together. Strong intracellular protein filaments, which are cytoskeleton elements, span each epithelial cell's cytoplasm and adhere to certain junctions in the plasma membrane to accomplish this.
The skin is made up of three tissue layers: the epidermis, and the outermost layer. The middle layer is the dermis. The bottom, or fatty layer, is the hypodermis. A coating is provided by epithelial tissue (skin, the linings of the various passages inside the body)
Only the heart contains cardiac muscle tissue, a unique, well-organized form of tissue. It is in charge of keeping the heart beating and the blood flowing throughout the body.
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Which type of air mass is the most responsible for the cold weather that travels from canada to north carolina during the winter?.
The continental polar air mass is the most responsible for the cold weather that travels from Canada to north Carolina during the winter.
Air mass is the volume of the air which is measured according to its temperature and humidity. A certain air mass will have the same temperature and humidity all across it. When two different air masses interact they cause the change in weather.
Weather is the phenomenon that explains the exact climatic condition of a smaller area. Weather is considered by taking into account the temperature of the area along with the conditions like humidity, cloudy, windy, etc. Weather is a small time phenomenon as it changes from time to time and place to place.
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What is the difference between a molecule and a compound.
Question 5 options:
In a molecule, two or more same atoms are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected.
In a molecule, two or more same molecules are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected.
In a molecule, two or more same atoms are connected with the chemical bonds. However, in a molecule, two or more, same or different atoms and molecules are connected.
In a molecule, two or more same compounds are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected.
Answer:The correct answer is the first one
Explanation:
In a molecule, two or more same atoms are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected. ----btw pls give me the brainy thing<3