Cancer was first discovered about 3000BC.
Although the word "cancer" was not used, the earliest description of the disease was found in Egypt and dates to about 3000 BC. A portion of an ancient Egyptian trauma surgery textbook is replicated in the Edwin Smith Papyrus.
Cancer has been documented in the history of medicine since the first medical records were recorded. Seven papyri that were found and deciphered at the end of the 19th century include the earliest descriptions of cancer that are known to exist. The first direct information about Egyptian medical practice was provided by them.
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in the stomach, food becomes a semisolid paste called
In the stomach, food becomes a semisolid paste called Chyme.
What is chyme?
Chyme, a thick semifluid mass of partially digested food and digestive fluids generated during digestion in the stomach and intestine. The gastric glands produce digestive fluids in the stomach, which contain the enzyme pepsin, which breaks down proteins, and hydrochloric acid. Food causes the pancreas to secrete fluid having a high concentration of bicarbonate once it reaches the small intestine. This fluid neutralizes the extremely acidic gastric juice, which would otherwise destroy the intestine's membrane lining, leading to a duodenal ulcer. Other secretions from the pancreas, gallbladder, liver, and intestinal wall glands contribute to the overall amount of Chyme.
Food particles are absorbed by the intestinal wall and delivered to the circulation when they are sufficiently reduced in size and content. Some food is transferred from the small intestine to the large intestine, sometimes known as the colon. Bacteria in the colon break down proteins, carbohydrates, and certain plant fibers that are not completely digested by the other organs.
Hence, food becomes a semisolid paste called Chyme
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which micropipette should you use to most accurately dispense 125 microliters of solution?
P200 micropipette should you use to most accurately dispense 125 microliters of solution
The micropipette is used to transport tiny volumes of liquid (less than 1 ml). On micropipettors, the scales are in microliters (1 ml = 1000 l). We will be using micropipettors known as "Pipetmans," which are manufactured by Rainin. These are extremely pricey, sensitive tools that cost $250–300 each. Pipetmen are available in three sizes that may pipete three different volume ranges: P20 = 0.5–20 l, P200 = 20–200 l, and P1000 = 200–1000 l. They work in conjunction with plastic disposable tips, which are frequently sterile.
The simple criterion for choosing amongst them is to employ the smallest micropipettor you can while remaining within its capacity. Say you need to measure out 25 microliters of a solution, for instance. DON'T DO IT, okay? A P20 can't fit someone who is 25, so don't. You can fit 20 in either a P200 or a P1000; choose the smaller one.
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1) The human body contains as many as 1 ______ neurons.a) millionb) billionc) hundred thousandd) trillion
Answer:
Trillion
Explanation:
T/F : agglutinogens are only found on the surface of red blood cells.
True
Agglutinogens are found only on the surface of red blood cells. Anything that acts as an antigen in the formation of a specific agglutinin.
Any substance that acts as an antigen to stimulate agglutinin production. Agglutinogens are proteins found on the surface of all red blood cells in the body. The type of agglutinogens found on red blood cells can help determine a person's blood type.
Red blood cells are the most common type of blood cell and the primary way for vertebrates to distribute oxygen to their body tissues via blood flow through the circulatory system. Red blood corpuscles, haematids, erythroid cells, and erythrocytes are other names for them.
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what posterior part of the eye is full of blood vessels?
Your eye's choroid is the spongy middle layer between the sclera and retina. The choroid, which is packed with blood vessels, provides nourishment for the retina's outer layers.
Which region of the eye is lined with blood vessels?
Choroid. The thin, blood-rich membrane that supplies blood to the retina and is located between the sclera and the retina.The iliac body: the part of the eye that connects the choroid and iris together.
Which eye layer has blood vessels?
Between the sclera, which is the white outer layer of the eye, and the retina, which is the inner layer of nerve tissue at the back of the eye, is the choroid, a thin layer of tissue that is part of the middle layer of the wall of the eye. Blood vessels line the choriod, carrying nutrients and oxygen to the eye.
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Agents that prevent or relieve itching are ________ agents.A) antifungalB) antibioticC) antiviralD) antipruritic
Answer:
D. Antipruritic
Explanation:
To solve this we need to know the roots of the words we are given. "Anti" we know means to inhibit or stop. Fungal refers to fungus, biotic refers to bacteria, and viral refers to viruses. This leaves the root "Pruritic " for us to figure out. By process of elimination, this is of course our answer, but we need to know and recognize that the word "Pruritis" means itching. Therefore antipruritic would refer to something that stops or inhibits itching.
How do objects appear when all of the colors of light are absorbed reflected selectively absorbed?.
The objects appear when all of the colors of light are
When аn object аbsorb light, the аtoms thаt mаke up thаt object аre аbsorsing the energy of the light hitting the object.When аn object reflects light, the аtoms thаt mаke up thаt object cаnnot аbsorb the energy of the light hitting the object.When an object selectively absorbed light, the аtoms of the object will аbsorb the light energy if the frequency of the light is exаct аmount of energy object.Light аcts аs both а pаrticle аnd а wаve, аnd is meаsured in two importаnt wаys. The wаvelength of light refers to the distаnce between two consecutive wаves in sequence, meаsured in nаnometers (nm). The frequency of the light meаsures the vibrаtionаl intensity аnd speed of the wаve (i.e. how mаny wаves in а given аmount of time), meаsured in hertz (Hz). These two wаys of meаsuring light аre inversely proportionаl, meаning when the wаvelength of light is higher, the frequency will be lower, аnd vice versа.
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What is it called when the cell still has 46 chromosomes?.
It is called when the cell still has 46 chromosomes is a diploid cell
Chromosomes are fine threads that can absorb the colors inside the cell. Chromosomes are made of protein and a DNA molecule which contains the genetic instructions an organism inherits from parents. Chromosomes consist of centromeres, chromatids, telomeres, chromosomes and satellites.
The process of fertilization by the meeting of ovum cells and sperm cells produces diploid cells with a chromosome number of 46 chromosomes or 23 pairs of chromosomes. In diploid cells, chromosomes appear in pairs, which are called homologous chromosomes. Homologous chromosomes have the same shape, size and gene sequence.
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If John and Sam each push on a boulder with a force of 30N, but in opposite directions, what will happen to the boulder?
John Sam
Question 2 options:
The boulder moves towards Sam
The boulder moves away from John and Sam
The boulder moves towards John
The boulder will not move.
If John and Sam each push on a boulder with a force of 30N, but in opposite directions, the boulder will not move and is therefore denoted as option D.
What is a Force?This is referred to as an influence that can change the motion of an object and the unit is Newton.
In a scenario where there is an equal amount of force acting in the opposite direction, then it means there is an equilibrium. This means that the object will not move as in the case of the boulder and is therefore the reason why option D was chosen as the correct choice.
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What are the parts of the bony fish labeled a and b? Select from the drop-down menus to label the parts of the bony fish. k-12.
Answer:
Explanation:
tail bone
Spine ribs gills catfish ewwww
A. Dorsal Fin
B. Pelvic Fin
k12 test
Are yellow seeds dominant or recessive?.
Yellow seeds are dominant.
Dominant describes the association between two genetic variations.An individual inherits one of each of the two alleles for each gene from each parent. Only one of the gene's alleles—known as the dominant gene—will be expressed if the alleles are distinct.
Allele-allele interactions that are dominant or recessive are the most common. A gene is said to have a dominant allele when it effectively exceeds a recessive allele. There are two examples of dominant/recessive gene interactions: blood type and eye colour.
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optimal growth temperatures are based on those at a two-inch soil depth.
Optimal growth temperatures are based on those at a two-inch soil depth. is true statement.
What is Optimal growth temperatures?
the shortened term The term "OGT" refers to the midpoint of the optimal growth temperature range. The OGTs that are taken into consideration for plastid species, archaea, and bacteria are 2 to 52.5°C, 22.5 to 114°C, and 7 to 85°C, respectively.Most bacteria are mesophiles, which can thrive best at temperatures between 20 and 45 degrees Celsius. Due to their preference for body temperature (37 oC), many infections are mesophiles. It is best for thermophiles to grow between 55 and 65 degrees Celsius. In hot springs, compost piles, and hot water heaters, thermophiles can be discovered.The optimal temperature range for human infections to proliferate is between 35 and 37 degrees Celsius. At 36°C 2°C and 35°C 1°C, respectively, it is advised to conduct biochemical tests for identification of pure isolates.To learn more about two-inch soil refer to:
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the process of synthesizing rna from dna is known as
Transcription is the process by which RNA is synthesis from DNA.
Transcription, as used in genomics, is the process of creating an RNA copy of a gene's DNA sequence. The information about the protein encoded by the gene is transported by this copy, known as messenger RNA (mRNA).
Although DNA is a more durable molecule than RNA, the latter is a more universal biological language.
During the DNA transcription process, which converts a DNA template into RNA, RNA polymerase enzymes produce an RNA copy of a DNA sequence. RNA polymerases are multi-chained polypeptides with a molecular weight of 500,000. In eukaryotic cells, there are three different categories of RNA polymerases.
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what protects mrna from attack by cellular enzymes?
A small molecule that specifically binds to another molecule, usually a larger one
A) is called a signal transducer.
B) is called a ligand.
C) is called a polymer.
D) seldom is involved in hormonal signaling.
E) usually terminates a signal reception
A ligand is a tiny molecule that particularly binds to some other molecule, typically a bigger one.
A molecules that selectively attaches to a bigger one is called a ligand. Recptor-ligand contact and signalling pathway activation are divided into four categories based on the origin of the ligand (from the same cell, from a nearby cell, or from a distance): autocrine, endocrine, paracrine, and juxtacrine. the process through which a cell reacts to things outside of it via signalling molecules that are both inside and on its surface. As a broad term for molecules that particularly attach to other molecules, "ligand" is frequently used to refer to signalling molecules (such as receptors). The message sent by a ligand is frequently transmitted inside the cell through a series of chemical messengers.
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Why did Mendel choose pea plant for his experiments Class 10?.
Mendel chose the pea plant for his experiments because of its distinct and easily observable traits, self-fertilization, short generation time, and the presence of contrasting traits in several characteristics.
The reasons are stated below:
One reason is that pea plants have distinct, easily observable traits, such as flower color and seed shape. Additionally, pea plants have both male and female reproductive organs, making them self-fertilizing.
This allowed Mendel to easily control the breeding of the plants and track the inheritance of specific traits.
Another reason is that pea plants have a relatively short generation time, which meant Mendel could conduct many generations of breeding experiments in a relatively short period of time.
Furthermore, Pea plants also have seven characteristics with two contrasting traits. This made it easy for Mendel to study the inheritance patterns of these traits.
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Do trees hold any special cultural importance to you, your family or culture? What is that importance?
Answer:
Particular trees have a sacred status, are used in rituals, provide ingredients for cultural dishes or have symbolic importance for ethnicity, identity and connection to a place. Trees also play a central role in stories, myths and histories.
Answer:
Trees are widely considered to be important in many cultures around the world for a variety of reasons. Some examples include:
Many indigenous cultures view trees as sacred and hold them in high spiritual regard. They may be seen as symbols of life, fertility, and wisdom, and are often revered in religious rituals and ceremonies.In many cultures, trees are associated with ancestors and the afterlife. They may be planted near graves or used in funeral ceremonies as a way to honor the dead and connect them with the living.Trees are also important for their practical uses, such as providing shade, food, medicine, and wood for shelter and tools. Many cultures have developed a deep understanding of how to use and care for different types of trees and rely on them for survival.Trees are also important for environmental reasons, they play a crucial role in maintaining the balance of the ecosystem and regulating the climate, they also help in providing fresh air and maintaining the water cycle.Overall, trees hold cultural, spiritual, practical, and environmental importance in many cultures around the world.
in the five-kingdom system, which kingdom consists primarily of unicellular eukaryotes?
The Protista kingdom is composed primarily of unicellular eukaryotes, making it the most diverse of the five kingdoms in the five-kingdom system.
Protists, as they are commonly known, can be found in all types of habitats, from oceans and freshwater to soil belonging to the five kingdom system.
They range from microscopic single-celled organisms to large multicellular organisms, and can be either photosynthetic or heterotrophic.
Protists are essential for the health of ecosystems, as they play a key role in the global cycling of nutrients and energy and are unicellular.
Protista are found in a variety of habitats, from freshwater to marine, and range from simple to complex organisms. Examples of protists include algae, slime molds, and amoebas.
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I the round-the-alimentary canal trip intereting? What are the clae of food that have been digeted by and aborbed into the body? Are there any clae of food that leave the body undigeted?
The majority of the nutrients in your meal are digested and absorbed in the small intestine before being transported by your circulatory system to other areas of your body for storage or utilization. Special cells assist absorbed nutrients in getting through the gut barrier and into the circulation.
What are the seven steps of digestion?The digestive processes include ingestion, propulsion, mechanical digestion, chemical digestion, absorption, and feces.
How is food metabolized and absorbed by the body?Large food molecules break down into smaller ones when they move through the GI tract and interact with digestive fluids. The bloodstream carries these smaller molecules to the rest of the body once the body absorbs them through the small intestine's walls.
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Cytoine make up 30% of the nucleotide in a ample of DNA from an organim. Approximately what percentage of the nucleotide in thi ample will be guanine?
Guanine will make up 20% of the nucleotides in this molecule, with the remaining 80% being cytosine. Guanine (20%) = Cytosine (20%); Adenine (30%) = Thymine (30%).
What is the ratio of guanine to cytosine in DNA?The DNA of any organism should have a 1:1 ratio of pyrimidine and purine nucleotides, according to Chargaff's standards. More specifically, the ratio of guanine and adenine to cytosine and thymine should be the same.
What proportion of cytosine and thymine does a DNA sample with 15% adenine contain?According to Chargaff's criteria, adenine and thymine must always couple with cytosine and guanine, respectively, in a DNA molecule. Thymine couples with adenine, so there will always be one thymine base for every adenine base.
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Why do some people believe in the fixity of life? Or the fixity of Earth?
Some people may believe in the fixity of life and the fixity of Earth for a variety of reasons, including religious or philosophical beliefs, lack of exposure to scientific evidence, or a mistrust of scientific explanations.
Many religious beliefs hold that life and the Earth were created by a higher power and that they remain unchanging, thus making the fixity of life and the Earth an integral part of those beliefs.
Some people may be resistant to accepting the idea of evolution because it challenges their existing beliefs or understanding of the world.
Some people may have had little exposure to scientific evidence and theories, and they may not have been exposed to the evidence that supports the idea of evolution.
Some people may have mistrust of science, and they may be skeptical of scientific explanations, particularly those that challenge their existing beliefs or understanding of the world.
People may also believe in the fixity of life and the fixity of Earth because of lack of understanding of the scientific concepts and evidence behind the idea of evolution and the processes that shape the Earth and life.
Can someone help me with these 2 questions?
Answer:
1.We'd all die. Explanation: If we were a newly fertilized egg, we wouldn't develop. We'd stay that fertilized egg. If we were a full sized adult, we wouldn't heal wounds, wouldn't replace cells (you lose about 40,000 skin cells every minute - so you'd run out of skin in a short time if you didn't have cell division).
2A mutation occurs during the development of muscle cells but not in blood cells. Different genes are activated in muscle cells than in blood cells. Muscle cells experience different environmental influences than blood cells. Muscle cells are produced by the brain, but blood cells are produced by the heart.
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what type of biomolecule contains phosphorus
Answer:DNA,RNA,ATP
Explanation:
The hair color of 39 males and females was recorded. Thirteen of them had brown hair. Eleven of them had blonde hair. Five males had brown hair. Four females had blonde hair. There were 21 females altogether.
The amount of melanin, a pigment, in hair determines the color of the hair. People with black or brown hair have high levels of eumelanin, one kind of melanin.
Given the total number of boys and girls = 39
Number of people having brown hair = 13
Number of people having blonde hair = 11
Number of boys having brown hair = 5
Then number of girls having brown hair = 13 - 5 = 8
Total number of females = 21
Number of females having blonde hair = 4
Then number of boys having blonde hair = 11 - 4 = 7
Number of boys in total strength = 39 - 21 = 18
Number of girls having blonde hair and brown hair = 8 + 4 = 12
Number of girls without blonde or brown hair = 21 - 12 = 9
Number of boys without blonde or brown hair = 18 - (5+7) = 6
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Answer: I did the test
What is the magnification of the ocular lens?
The ocular lenses on your scope have a 10X magnification. Immersion Oil: By contrasting the specimen with the medium, clear, minutely detailed pictures are produced. This contrast is achieved by altering the specimens' medium's refractive index.
Magnification is the process of expanding something's perceived size rather than its actual size. This expansion is measured in terms of a calculated quantity known as "magnification." The term "minification" or "de-magnification" is frequently used to describe a reduction in size when this number is less than one.
Magnification frequently refers to enlarging graphics or images to view more detail, boosting resolution, using a microscope, printing methods, or digital processing. The viewpoint of the picture is unaffected by image magnification in any situation.
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a rooster with grey feathers is crossed with a hen of the same phenotype. they produce 15 chicks with grey feathers, 7 chicks with black feathers, and 8 chicks with white feathers. what is the simplest explanation for this inheritance pattern?
The simplest explanation for the observed inheritance pattern of 15 grey-feathered chicks, 7 black-feathered chicks, and 8 white-feathered chicks is that a rooster with grey feathers was crossed with a hen of the same phenotype.
This suggests that the grey feathers are dominant, while the black and white feathers are recessive. The resulting offspring will therefore display a 3:1 ratio of grey to black-and-white feathers, which is exactly what was observed.
The simplest explanation for this inheritance pattern is that the rooster and hen both possess a gene for grey feathers, but that the rooster may also possess a gene for black feathers, while the hen may possess a gene for white feathers.
This would explain why the offspring of the two birds consists of 15 chicks with grey feathers, 7 chicks with black feathers, and 8 chicks with white feathers.
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what body part produces and stores cells that fight infection and disease?
1. Your teacher will provide you with two test tubes wrapped in foil. The test tubes contain colonies of Euglena, which are photosynthetic microorganisms. Find the hole in the foll around one of the test tubes. 2. Where do you predict Euglena will be found in each test tube? Record your prediction. 3. Carefully remove the foll from each test tube. Make sure not to shake or disturb their contents. Observe the locations of Euglena in the test tubes, and record your observations. Analyze and Conclude 1. Identify Patterns What pattern do you observe in the distribution of Euglena in the two test tubes? 2. Construct an Explanation How could the pattern you observed in Euglena behavior be useful or beneficial to the organism? Propose a logical explanation. 3. Apply Scientific Reasoning Euglena can also live heterotrophically. If you repeated the experiment with test tubes of Euglena that also contained a food source, do you think the results of your experiment would be the same? Explain your reasoning.
In the dark test tube carbon dioxide will be created, and will bring about the corrosiveness level in the water increment.
What happens in the light test tube carbon dioxide?In the light test tube carbon dioxide will be devoured, making the oxygen level ascent and make the corrosiveness level lessening.The test tubes contain colonies of Euglena, which are photosynthetic microorganisms.
Observe the locations of Euglena in the test tubes, and record your observations.If you repeated the experiment with test tubes of Euglena that also contained a food source.
Therefore, In the dark test tube carbon dioxide will be created, and will bring about the corrosiveness level in the water increment.
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Read the excerpt from paragraph 3.
Stan Krugman collected the seeds and an attempt at germinating some of the seeds was made in Houston.
Somewhat surprisingly, it proved successful and the seeds started growing, but they did not survive long because
the facilities there were inadequate. A year later the remaining seeds were sent to the southern Forest Service
station in Gulfport, Mississippi (sycamore, loblolly pine, and sweetgum) and to the western station in Placerville,
California (redwood and Douglas fir) to attempt germination. Many of the seeds, and later cuttings, were successful
and grew into viable seedlings.
What is the meaning of viable as it is used in the excerpt?
A. weak
B. suitable
c. complete
D. awful
The meaning of viable as it is used in the excerpt is suitable.
Thus, the correct option is suitable (B).
To find the meaning of viable, we must know what kind of the word. From the sentence "Many of the seeds, and later cuttings, were successful and grew into viable seedlings", we know that the word viable is adjective because viable explains the noun 'seedling'. The sentence connected with biology term.
In biology, we will find the explanation about a viable seed. А viаble seed is one which is cаpаble of germinаtion under suitаble conditions. The definition includes dormаnt but viаble seeds, in which cаse the dormаncy must be broken before viаbility cаn be meаsured by germinаtion. From this definition, we can conclude that the meaning of viable is suitable.
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Answer:
B. Suitable
Hope this helps!
Explanation:
Water exits plants and enters the atmosphere through which process?
Water exits plants and enters the atmosphere through the transpiration process.
The wаter cycle, аlso known аs the hydrologic cycle, is the journey thаt wаter tаkes аs it moves through the аtmosphere аnd through vаrious pаrts of Eаrth. There аre multiple processes in the wаter cycle, which include:
Evаporаtion Condensаtion Precipitаtion TrаnspirаtionTrаnspirаtion is the process by which moisture is cаrried through plаnts from roots to smаll pores on the underside of leаves, where it chаnges to vаpor аnd is releаsed to the аtmosphere. Trаnspirаtion is essentiаlly evаporаtion of wаter from plаnt leаves. Trаnspirаtion аlso includes а process cаlled guttаtion, which is the loss of wаter in liquid form from the uninjured leаf or stem of the plаnt, principаlly through wаter stomаtа.
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