The reason behind the acceptance of Darwin's theory is based on D It is supported by practical evidence and examples which help to shape a scientific theory such as in this case.
Why is important the presence of evidence to formulate a scientific theory?The presence of evidence is key to formulating a scientific theory because all theories in sciences are based on the repetitive observation of empirical data that can be used to make predictions and thus tested i.e., confirmed or rejected by experimental or observational procedures such as in the case of the evolutionary theory proposed by Charles Darwin to explain the origin of species.
Therefore, with this data, we can see that the presence of evidence is fundamental in order to formulate a scientific theory since this info allow us to understand a given observation of the natural world and also allow us to make predictions.
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Which evidence best supports the claim that mutations are a source of inheritable genetic variation?
ANSWER: Mutations affect protein synthesis which impacts the way traits are expressed.
Sickel cell anemia. What type of mutation error has occurred to cause the disorder shown?
ANSWER: substitution
Examine the two strands of DNA below. Which kind of mutation occurred?
Original strand: AGC GTA CCC TAC
New strand: AGC GTA ACC TAC
ANSWER: substitution
Millions of years ago, the ancestors of giraffes had short necks and used to eat leaves from the bushes on the ground. A genetic mutation caused one giraffe's neck to be taller. This long-necked giraffe was able to eat leaves that were higher up on trees. This gave it an advantage as it was able to access more food than other giraffes. Over millions of years, all of the giraffes became long-necked. Which type of environmental factor caused this mutation to be inherited?
ANSWER: food availability
What is one way that a frameshift mutation could occur?
ANSWER: two nucleotides are deleted
The insertion or deletion of nucleotide bases in amounts that are not multiples of three is referred to as a frameshift mutation in a gene.
What is Frameshift mutation?This is significant because a cell reads the genetic code for proteins in groups of three nucleotides.
These so-called "triplet codons" each stand for one of the 20 different amino acids that go into making a protein.
The entire gene sequence after the mutation will be misread if a mutation alters this regular reading frame. This may lead to the incorrect amino acids being added to the protein or the development of a codon that prevents the protein from getting longer.
Therefore, The insertion or deletion of nucleotide bases in amounts that are not multiples of three is referred to as a frameshift mutation in a gene.
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Please answer all and make sure they are correct!!!!!!!! 50 POINTS
I know its a lot sorry..... :(
---------------------------------------------------------------------------------------------------------------------Name all the Five Extinctions.
When did they happen?
What are the causes?
What are the top three groups that became extinct?
What is a coal gap?
What is a coral gap?
Which is the biggest extinction?
How many years did it take for the ecosystems to recover after the Permian Triassic Mass Extinction?
Which mass extinction is the briefest among all five mass extinctions?
How big was the hole created by the asteroid when it hit the earth?
Which mass extinction had the biggest deep ocean extinction?
----------------------------------------------------------------------------------------------------------------------------
!!!!! 50 POINTS !!!!!! !!!!! 50 POINTS !!!!!! !!!!! 50 POINTS !!!!!!
Please make sure your answer is correct!! Thank you.
Ordovician end (444 million years ago; mya), Devonian, late (360 mya), Final Permian (250 mya), People frequently confuse the end of the Triassic period (200 mya) for the extinction of the dinosaurs.
What is mass extinction?
End of the Cretaceous (65 million years ago), the dinosaur extinction catastrophe. The primary reason for contemporary extinctions is habitat destruction.
Permian and the beginning of the Triassic periods, some 250 million years ago, Earth went through its worst environmental catastrophe ever.
The crater's diameter and depth are estimated to be 180 kilometers (110 miles) and 12 miles.
Therefore, around 252 million years ago, the end of the Permian epoch was marked by the greatest extinction in Earth's history.
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Some traits follow non-Mendelian patterns of inheritance. Which is the best term for these patterns based on the reading?
Some traits follow non-Mendelian patterns of inheritance, polygenic traits is the best term for these patterns based on the reading.
The non-Mendelian inheritance pattern is known as what?They are referred to as polygenic traits. The phenotype is slightly amplified by the alleles of each gene. Particularly if each gene has multiple alleles, there are numerous allele combinations that could exist. As a result, a vast spectrum of phenotypes is possible. Adult height is an illustration of a polygenic trait in humans.
Any trait that has a gradient, such as height, skin tone, hair color, nose size, or shape, is non-Mendelian, polygenetic, and influenced by numerous alleles. Another instance of a polygenetic trait that is not Mendelian is eye color.
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Before testing the pea plants, Mendel formed a five-part hypothesis. What did Mendel include in his hypothesis
The following are included in Mendel's theory: A pair of components regulate traits (known as genes). One gene is inherited from each parent for each trait. Every quality is passed down from one generation to the next.
During the development of gametes, genes divide. When two genes are in direct opposition to one another, one gene may be expressed while the other is hidden.
A trait may not manifest in an individual but can still be passed on to the next generation, and the genes for each trait separate themselves during gamete formation. Individuals inherit one such unit for each feature from each parent.
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what is the relationship of chemoreceptors, carbon dioxide, PH and ventilation rate?
The relationship between chemoreceptors, carbon dioxide, pH and ventilation rate is that the chemoreceptors detect changes in the levels of carbon dioxide and pH in the blood, and signal the brain to adjust the rate of ventilation accordingly to maintain the normal range of carbon dioxide and pH in the body.
What are chemoreceptors?Chemoreceptors are specialized sensory cells that detect changes in the levels of certain chemicals, such as carbon dioxide and pH, in the blood. These receptors are found in the carotid bodies and aortic bodies, which are located near the carotid artery and the aorta, respectively.
Chemoreceptors in the carotid and aortic bodies are sensitive to changes in the levels of carbon dioxide and pH, and they signal the brain to increase or decrease the rate of ventilation accordingly
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In your own words, describe what happens when a flat sign is put in front of a pitch and how the sound is affected.
Answer:
When a flat is put in front of a pitch it raises the pitch of the original note by a half step, a flat lowers the pitch of a note by one half step.
Explanation:
Which phrase describes estuaries?
are made of fresh water only
are areas where rivers flow into lakes
are homes to unique plants and animals
are places where all of Virginia's water drains
O
are areas where rivers flow into lakes. A coastal body of brackish water that is partially contained, has one or more rivers or streams flowing into it, and has a free connection to the open sea is called an estuary.
Estuaries are areas of water where rivers and the ocean converge. They serve as habitat for a variety of fauna, including well-known fish species. They also help employment, tourism, shipping, and other things. Due to the fact that estuaries often have brackish waters, which are a mixture of fresh water that drains from the land and salty ocean, many different kinds of plant and animal species call them home. Numerous habitats are produced by this unusual admixture of fresh and salt water.
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Which of the following helps determine past climate on the basis of tree rings?
O oxygen isotope analysis
O pollen analysis
O dendrochronology
O 18O/16O ratio
O all of the above
If the year dates of the tree growth rings can be identified, the scientific discipline of dendrochronology can indeed be utilised to establish when a tree was cut down or died naturally. Seasonal climate shifts affect a tree's annual growth, which varies throughout the year.
Dendrochronology's goal is what?The study known as dendrochronology, sometimes known as tree-ring dating, uses the annual growth rings that trees create to determine dates on a calendar (Nash 2000). This precise and sophisticated dating technique has been employed by archaeologists for nearly a century.
What dendrochronology principles are there?According to this theory, there must have been physical and biological mechanisms in place in the past that connect present environmental processes with the patterns of tree development that exist today. James Hutton first said this in 1785, and it is now often understood to mean "the current is the keys to the past."
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1. Which of the following does not affect population?
O taxes
O immigration
O birthrate
Odeath rate
Taxes.
Immigration is the process of leaving one place. So it can't be.
Birth Rate is essentially more births happening. That effects population. Same as deatb rate.
cheese
pepper powder
lettuce
ham
salt
tomato
can you guys tell me if all of this ingredients is colloid,suspension or solution?
Cheese is a colloid.
Pepper powder is a suspension.
Lettuce, ham, salt and tomato are not considered to be a colloid, suspension or solution as they are classified as solid food items.
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Why are rapidly growing populations an issue?
A . They utilize resources faster then they can replenish
B. They overwhelm water purification plants.
C. They spread out over vast areas of land turning farms and habitat into housing.
D . All of the above .
Which is not part of a community infrastructure?
A. Public water supply
B. Arable land
C. Power plants
D. Sewer lines
In this century , the world population is likely to..
A. Stop growing
B. Begin to slowly decline
C. Continue to slowly grow
D. Continue to rapidly grow .
Which is not a strategy to reduce population size?
A. Public advertising
B. Economic incentives
C. Legal punishments
D. Limiting education for women
What are the 4 main points of natural selection?
The four major principles of natural selection are that populations of living things change over time due to a straightforward mechanism called natural selection.
In fact, it is so straightforward that it can be divided into five simple processes, referred to here as VISTA (variation, inheritance, selection, time, and adaptation). Most attributes are inherited, more offspring are generated than can survive, and offspring with more attractive traits will survive and have more offspring than those with less favorable traits.
These three principles result in natural selection, which is an unavoidable process. More environment-adapted organisms are more likely to survive and pass on the genes that contributed to their success. Over time, species change and diverge as a result of this process.
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In sentence 3 (reproduced below), the writer wants to ensure that the connotation of the underlined word is appropriate to the context of the sentence. Adolescents have unique sleep patterns, and with an early school start, many are doggedly tired, leading to serious health and safety risks. Which of the following versions of the underlined word would best accomplish this goal?.
A. resolutely
B. relentlessly
C. chronically
D. steadily
Option C, The word "chronically" is the best option in this context as it conveys the idea that the tiredness faced by adolescents is a long-term and persistent problem. The word "chronically" implies that the tiredness is ongoing and consistent, which is a suitable description for the scenario described in the sentence.
The use of the word "chronically" in this context is appropriate as it emphasizes the fact that the tiredness faced by adolescents is not a temporary or occasional issue, but a long-term, persistent and ongoing problem.
This helps to convey the idea that the sleep pattern problems faced by adolescents due to an early school start are not a minor inconvenience, but a serious issue with potential health and safety risks.
For example, it can lead to poor academic performance, mood swings, lack of attention, an increase in risk-taking behavior, and even accidents. Therefore, the use of "chronically" in this sentence effectively highlights the gravity of the situation and the importance of addressing the problem.
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Where is mucus present?
Mucus lines the inside of several body organs and cavities (such as the nose, mouth, lungs, and stomach).
Mucus is produced by membranes in the nasal passages and sinuses, in addition to the digestive tract, the cervix, and the urinary tract. Mucus' primary function is to prevent foreign particles and chemicals from getting into the lungs by working in conjunction with the mucociliary system and clearing them out.
Mucus is full of antibodies and enzymes, and it helps our immune systems by functioning as a natural filter for the bacteria that we come into contact with on a regular basis. Its purpose is to eliminate or render harmless any potentially hazardous bacteria that may be present in the air.
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An insect moves randomly at different speeds depending if it is in a favorable environment or not. Which of the following describes this insect's movement pattern
Kinesis describes the movement patterns of this insect.
Kinesis, animals slow down in favorable environments and speed up in unfavorable ones. In this way the animal spends more time in a favorable environment.
In kinesis, an organism changes its movements in a directionless way. Example : Accelerate or decelerate - depending on the information. Woodlice, for example, move faster in response to temperatures higher or lower than their preferred range. Kinesis has been shown to be beneficial both in patch assimilation and in altering food distribution. Kinesis can slow species invasion and spread through the Alley effect.
An example of kinesis is the movement of cells or organisms as a result of exposure to certain stimuli such as light, temperature or chemicals.
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Complete question:
An insect moves randomly at different speeds depending if it is in a favorable environment or not. Which of the following describe this insect's movement pattern?
Kinesis
Taxis
Most of the genetic disorders you have learned about are the result of a change in DNA sequence, as with cystic fibrosis, or the presence of
an extra chromosome, as with Down syndrome. The exception is Turner's syndrome. Women with Turner's syndrome have only 45 chromosomes. They are missing an X chromosome. This disorder is the only case in which a person can survive with one less chromosome.
What does this tell you about
how genetic information is inherited in humans?
Please help
The most genetic information is inherited in humans on the x-chromosome.
In bacteria, each messenger RNA (mRNA) serves as a template for the production of one or more particular proteins. Messenger RNAs (mRNAs) carry information from DNA. Translation is the process by which the primary amino acid sequence of a protein is established from the nucleotide sequence of an mRNA molecule.
Their mother passes one copy on to them through the egg, while their father passes the other one along sperm. Each egg and sperm have a single set of 23 chromosomes. Two copies of each chromosome and two copies of each gene are present when the sperm fertilizes the egg, resulting in the formation of an embryo.
Three separate processes responsible for the genetic diversity.
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Cystic fibrosis is a recessively inherited disorder that results from a mutation in the gene encoding CFTR chloride ion channels located on the surface of many epithelial cells. As shown in the figure, the mutation prevents the normal movement of chloride ions from the cytosol of the cell to the extracellular fluid. As a consequence of the mutation, the mucus layer that is normally present on the surface of the cells becomes exceptionally dehydrated and viscous.
An answer to which of the following questions would provide the most information about the association between the CFTR mutation and the viscous mucus?
answer choices
Is the mucus also secreted from the cells through the CFTR proteins?
How does the disrupted chloride movement affect the movement of sodium ions and water by the cell?
How does the mutation alter the structure of the CFTR proteins?
What is the change in nucleotide sequence that results in the CFTR mutation?
The question that would provide more information about the relationship between the CFTR mutation and the viscous mucus, is:
How does the disrupted chloride movement affect the movement of sodium ions and water by the cell?Correct answer: letter B.
This question is the right question to ask because the CFTR mutation disrupts the chloride movement, which in turn affects the movement of sodium ions and water by the cell.
This could be the cause of the abnormally viscous mucus layer, and the answer to this question would provide more information about the association between the CFTR mutation and the viscous mucus.
Regarding the question, Disruption of chloride movement affects the movement of sodium ions and water through the cell because it alters the osmotic balance between the cell and its environment. Normally, the flow of chloride ions out of the cell is coupled to the flow of sodium ions into the cell.
This creates an osmotic gradient that attracts water into the cell. When the flow of chloride ions is interrupted, this gradient is also interrupted, resulting in decreased movement of sodium ions and water into the cell. The result is dehydration and the formation of a viscous layer of mucus on the cell surface.
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Suppose that each fatty acid in a certain fat can make 9 molecules of acetyl CoA. Predict how many ATP can be made from the fatty acids in this fat
The number of ATP yielded through fat metabolism which makes 9 molecules of acetyl CoA is 108 ATP.
How many ATP produced on beta-oxidation?The process of metabolic reactions which convert fatty acids to acetyl CoA is called beta-oxidation. Through multiple steps in beta-oxidation, fatty acids are broken down to produce energy (ATP). Before producing the energy, fatty acids which are made up of carbons must be converted into acetyl CoA in advance.
If 9 molecules of acetyl CoA are produced, it indicates that the fatty acid has 18-Carbons. In other words, each acetyl CoA contains two carbon atoms.
Each acetyl CoA that has been produced, will enter into the citric acid cycle or known as Kreb’s cycle. This cycle yields 3 NADH (9 ATP), [tex]FADH_{2}[/tex] (2 ATP), and 1 ATP. The total ATP result is 12 ATP.
when there are 9 molecules of acetyl CoA, the ATP yielded is 9 x 12 ATP = 108 ATP.
Thus, if each fatty acid in a certain fat can make 9 molecules of acetyl CoA, the amount of ATP that can be made is 108 ATP.
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What is a substitution deletion and insertion point mutation?
Insertion mutation occurs when an extra base pair is added to a sequence of bases.
In general, a Point mutation refers to alteration in a single base pair of DNA by substitution, deletion, or insertion of a single nitrogenous base. Most common example of point mutation is sickle cell anemia. that consists of mutation in a single base pair in the beta-globin chain of hemoglobin pigment in the blood cells. Thus, An insertion can involve the addition of any number of nucleotides, that can be a single nucleotide or an entire piece of a chromosome.
An insertion is a point mutation in which one or more base pairs is added to a DNA sequence. Point mutations is further divided into silent mutations, missense mutations, and nonsense mutations.
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If a grain of the average apple tree pollen has 17 chromosomes and is used to pollinate an ovule, then the resulting apple seed will contain
Apple seeds produced from pollen have 17 chromosomes, so these seeds will contain 34 chromosomes.
Seeds are embryonic plants that are covered with a protective coating on the outside. Seed formation is part of the reproductive process in seed plants, namely spermatophytes.
Inside the seed, there is an embryo formed from the meeting between the male gamete (stamen) and the female gamete (pollen). The embryo has its position inside the seed, precisely at the core of the seed, and is surrounded by existing food reserves.
Because the seeds come from the meeting of 2 gametes, the number of chromosomes is 34, half of the male parent and half of the female parent.
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Can someone help me please? if you've done the nitrogen cycle on gizmo about the blue baby syndrome please respond
Gizmo High nitrate levels in a newborn's drinking water are typically the cause of the blue baby syndrome. To save other babies from getting sick and to identify the source of the elevated nitrates is crucial.
Blue infant syndrome is most frequently brought on by nitrate-contaminated water. A baby's body turns nitrates into nitrites after consuming formula prepared with nitrate-rich water. The body's haemoglobin binds to these nitrites to generate methemoglobin, which cannot transport oxygen.
A well-known risk factor for child methemoglobinemia is preparing infant formula using drinking water that has been polluted with nitrogen cycle. Infants that are affected have strange blue-gray skin and, depending on the degree of their disease, may become agitated or sluggish.
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The female reproductive system produces a reproductive cell called a(n) . These cells are produced in the ovaries. Then they travel to a(n) and finally to the uterus.
The female reproductive system produces a reproductive cell called egg . These cells are produced in the ovaries. Then they travel to fallopian tube and finally to the uterus.
What is the female reproductive system?
The outer part of the female genitalia is called the vulva, which means covering. The vulva is located between the legs and covers the opening to the vagina and other reproductive organs of the body.
Female reproductive organs are the vagina, uterus, fallopian tubes, and ovaries. A female reproductive system enables a woman to:
produce egg cells (eggs)have intercourseprotect and nourish fertilized eggs until they are fully developedgive birth HerOvaries have her two main reproductive functions in the body. They produce oocytes (eggs) for fertilization and produce the reproductive hormones estrogen, progesterone, and androgens.
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How nutritional information from food labels is used to identify if each of the products is high low or neither in terms of fat sugar and salt content?
Explanation:
Food labels always state the sugar, fat and salt content in percentage or per 100 grams or per serving to help consumers in their selection of products.
Later, heat rising from below causes part of the metamorphic rock to melt, forming magma. what is it?
Metamorphism occurs when the heat rising from below causes the part of the metamorphic rock to melt, forming magma.
What is metamorphic rock?Metamorphic rocks are formed from other rocks which substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks are formed when the rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, the combination of these factors.
Metamorphism occurs when the solid rock undergo changes in the composition and texture without mineral crystals undergoing melting, which is how the igneous rock is generated.
If there is too much heat or pressure applied, the rock will melt and become magma. This will result in the formation of an igneous rock, and not a metamorphic rock.
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What features of mature forest species, such as oak trees, make them able to dominate and compete in the ecosystem
They require a long time to become exceptionally tall interminably. They give an overhang to conceal the others and give natural surroundings to many living with widely varied vegetation.
Notwithstanding trees, each progressive local area harbors numerous other living things, with the best variety populating the peak local area. Comparative biological zonings happen among marine widely varied vegetation, reliant upon such environmental variables as a base organization, accessibility of light, and level of saltiness.
Particular logging is a more environmentally maintainable practice than clear-cutting, which involves eliminating all trees simultaneously. The thought behind particular logging is to keep lopsided or all-matured timberland of trees fluctuating in age as well as in size and species also.
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What is the summary of Mendel's principles?
Gregor Mendel discovered the basic laws of heredity through the study of peas. He concluded that genes come in pairs and are inherited as separate entities, one from each parent. Mendel traced the segregation of parental genes and their appearance in offspring as dominant or recessive traits.
Mendel's four postulates and laws of heredity are: (1) the principle of pair factor, (2) the principle of dominance, (3) the law of germline segregation or purity (Mendel's first law of inheritance) and (4) the law of independent selection (Mendel's second law of inheritance).
Mendel generalized the results of his pea experiment into his three principles that explain the genetic basis of diploid organisms. they are: the principle of segregation, the principle of dominance, and the principle of independent assortment.
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HIV is a retrovirus. How are retroviruses unique from other types of viruses? a. They can enter any type of body cell. b. They contain single-stranded RNA inside the capsid. c. They use the host cell RNA polymerase for transcription. d. They use reverse transcriptase to make DNA from RNA.
Answer:
d. They use reverse transcriptase to make DNA from RNA
How do relationships among organisms help ecosystems thrive? Provide at least 6 sentences.
Relationships among organisms play a vital role in maintaining the balance and stability of ecosystems. These relationships can be categorized into three main types: mutualism, commensalism, and competition.
In mutualism, both species involved in the relationship benefit. For example, many plants have mutualistic relationships with pollinators, such as bees. The plants provide nectar as a food source for the bees, while the bees help to pollinate the plants, allowing them to reproduce.
In commensalism, one species benefits from the relationship while the other is neither helped nor harmed. The relationship between cattle and cattle egrets is an example of commensalism. The egrets feed on insects stirred up by the cattle as they graze, while the cattle are not affected by the presence of the egrets.
In competition, two or more species compete for the same limited resource. This can lead to the evolution of unique adaptations that allow a species to better exploit a particular resource, which in turn can lead to greater biodiversity in an ecosystem.
Predator-prey relationships also play an important role in ecosystems by controlling population sizes and helping to maintain balance within the ecosystem. In addition, decomposers break down dead organic matter and recycle nutrients, making them available for other organisms to use.
In summary, relationships among organisms in an ecosystem are vital for maintaining balance and stability, and ultimately ensuring the survival of the ecosystem.
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differentiate between primary pulmonary cancers and secondary lung cancers?
Primary lung cancer is a type of cancer that starts in the lungs. Secondary lung cancer is cancer that spreads from another part of the body to the lungs. Primary lung cancer is the topic of this page. Primary lung cancer comes in two main types.
These are categorized according to the kind of cells in which the cancer first appears. These are: Non-small-cell lung cancer is the most prevalent type, affecting between [tex]80[/tex] and [tex]85[/tex] of every [tex]100[/tex] cases. There are three possible varieties: adenocarcinoma, squamous cell carcinoma, or large-cell carcinoma. Lung cancer with small cells is less common and typically spreads more quickly than non-small-cell lung cancer.
The recommended treatments are determined by the type of lung cancer you have. Older people are more likely to get lung cancer. It rarely happens to people under [tex]40[/tex]. In the UK, over [tex]4[/tex] out of [tex]10[/tex] people diagnosed with lung cancer are over [tex]75[/tex].
Lung cancer can occur in people who have never smoked, but smoking is the leading cause, accounting for more than [tex]70%[/tex][tex]%[/tex] percentage of all cases. This is due to the fact that smoking regularly results in the inhalation of numerous toxic substances.
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a pizza restaurant has hamburger pepperoni Canadian bacon and sausage how many ways can a three topping
From four individual toppings that are available, you can create four combinations of a 3-toppings pizza.
If a pizza restaurant has four toppings available namely hamburger, pepperoni, Canadian bacon, and sausage, therefore that particular pizza restaurant is able to make four different combinations of 3-topping pizzas out of those four toppings using the concept of permutations in probability. The first combination would be of a pizza with toppings of hamburger, pepperoni, Canadian bacon. The second combination would be of a pizza with toppings of hamburger, pepperoni, and sausage. The third combination would be of a pizza with toppings of hamburger, Canadian bacon, and sausage. The fourth combination would be of a pizza with toppings of pepperoni, Canadian bacon, and sausage.
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Your question seems incomplete, but I assume the full question was:
"A pizza restaurant has hamburger, pepperoni, Canadian bacon, and sausage. How many ways can a three topping pizza be created?"