what is theory of to observe the neucles in cheek cells
Answers
Answer: The theory of cheek cells is used for the identification of cheek cells.
Explanation:
The cells of cheek do not have cell wall. They have a cell membrane which allows on certain molecules to pass through it. The nucleus is located centrally in the cheek cells and it stores the DNA. It can be stained with the help of the methylene blue reagent. It appears blue in color which can be observed under the microscope. The cheek cells can be isolated from the buccal cavity by using cotton buds and cotton swabs can help in isolating the cells.
Related Questions
If you have an experiment in which there are 4 different groups, and the same variable is manipulated in all of them, is there a control group?
Answers
Answer:No
Explanation:I believe it is no due to the fact that the variable is being manipulated in all groups and in order to be a control groups the variable must remain the same or must not be manipulated.
hope this helps :)
in mendel's experiments on seed color, he self crossed plants heterozygous for yellow seeds (yy). what percentage of the offspring will be yellow? group of answer choices 50%
Answers
The percentage of yellow seeds would be 50% as yellow trait is dominant over green traits.
The allele for yellow seeds should be expressed with an upper case letter, while the allele for green seeds should be written in lower case, as yellow seeds are more dominant than green seeds. Assume that Y is the allele for yellow seeds and y is the allele for green seeds. The genotype of the heterozygous yellow-seeded plant will therefore be "Yy," whereas the genotype of the green-seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions). A heterozygous plant hybrid with yellow and green seeds will produce half yellow and half green offspring.
There are different gene variants called alleles. An organism's appearance is controlled by a dominant allele that hides a recessive allele.
A single gene copy is randomly selected in each gamete that an organism produces. The segregation law is what is known as this. A Punnett square can be used to forecast the genotypes (allele combinations) and phenotypes (observable traits) of offspring via genetic crosses.
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drugs and nutrients share similar enzyme systems in the small intestine and the liver. which medicine increases the enzymes that metabolize folate, vitamin d, and vitamin k, thus requiring possible supplementation of these nutrients?
Answers
Phenobarbital is the medicine that increases the enzymes that metabolize folate, vitamin d, and vitamin k, thus requiring possible supplementation of these nutrients.
What are enzymes?Enzymes are described as proteins that act as biological catalysts by accelerating chemical reactions.
The molecules upon which enzymes may act are known as substrates, and the enzyme converts the substrates into different molecules known as products.
phenobarbital is recommended by the World Health Organization for the treatment of certain types of epilepsy in developing countries around the world.
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Sue is visiting a natural history museum. She reads a sign for a dinosaur fossil that states that the fossil is from 78 million years ago.
What dating method did scientists use to determine the age of this fossil?
Answers
Answer:
it is absulute dating
Explanation:
2-3 TRUE/FALSE: This enzyme activity IS showing hydration synthesis trying to learn please help to identify
Answers
Answer:
The answer is FALSE
Explanation:
Im doing to same class
What is one way an organism could use auditory communication to help it survive?
Responses
marking territory
marking territory
greeting another member of the population
greeting another member of the population
calling for a mate
calling for a mate
calls to others to warn of a pred
Answers
Auditory communication is the use of sounds to send and receive information. Auditory communication is particularly important in birds. They use sounds to communicate warnings, attract mates, signal other birds to flock together, and for other important purposes. Some of the sounds made by birds are called birdsongs.
I guess all the options are correct
Which of these choices allows people to pass down survival techniques from
one generation to the next?
A. Communication
B. Foraging
C. Domestication
D. Clothing
Answers
Answer: Communication
Answer:
A. communication of course
Explanation:
A business tourist travelled from Capetown to Johannesburg. His flight lands qt OR Tambo International Airport. He attends a conference in Centurion. The hotel in Centurion arranged for a shuttle to pick him up from the nearest Gautrain station. The tourist is worried amd unsure if he will be able to use the Gautrain and be on time for the shuttle.
Answers
The tourist can use the Gautrain to reach Centurion and be on time for the shuttle.
The Gautrain is a rapid rail network in Gauteng, South Africa, connecting major cities including Johannesburg and Pretoria. Since the tourist's flight lands at OR Tambo International Airport and he needs to reach Centurion, he can utilize the Gautrain to travel between these locations. The Gautrain provides a convenient and efficient mode of transportation, allowing him to save time and reach his destination on schedule. By using the Gautrain and coordinating with the shuttle service, the tourist can ensure a smooth and timely transfer from the Gautrain station to the hotel in Centurion.
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Chargaff's rule.
Strands of DNA. Complete the chart below following
S313
DNA Strand
Сс T ATATGTGG CT CCGT GT GAC CTC
Complementary
Strand
CC
Da
Answers
Answer:
ATATGTGG CT CCGT GT GAC CTC
TATACACC GA GGCA CA CTG GAG
I assume you want me to pair this DNA strand with its complementary strand. I've just added the appropriate base, using the rule T-A and C-G.
How does the design of an experiment relate to the method of difference?
Answers
Answer:
The design of an experiment is synergistically related to the method of difference. Both are required in order to test a hypothesis and deliver a conclusion or evidence.
Explanation:
im not totally sure but hope it helps
how many valance does potasium have?
Answers
what defense mechanism do corn snakes use to avoid becoming prey?
Answers
Corn snakes, like many other snakes, have developed a variety of defense mechanisms to help them avoid becoming prey. One of the most common ways that corn snakes protect themselves is by blending in with their surroundings.
These snakes are typically found in rural and wooded areas, where their colors and patterns help them blend in with the leaves, grass, and other natural features of their environment.
Another common defense mechanism used by corn snakes is the ability to camouflage themselves when they feel threatened. When a corn snake is approached by a potential predator, it may freeze in place and remain perfectly still, making it difficult for the predator to spot it. Alternatively, the snake may adopt a defensive posture, coiling up and hissing in an attempt to scare off the predator.
Corn snakes also have the ability to produce a foul-smelling odor when they feel threatened. This odor is released from the snake's cloaca, which is located at the base of the tail. The smell is meant to deter predators and make the snake less appealing as prey.
Finally, corn snakes are known for their impressive speed and agility, which allows them to quickly escape from potential predators. When threatened, a corn snake may rapidly retreat into nearby cover, such as a pile of leaves or a hole in the ground, to avoid capture.
Overall, corn snakes have developed a variety of effective defense mechanisms that help them avoid becoming prey. These strategies allow them to survive and thrive in their natural habitats, despite the presence of numerous predators.
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4. Exercise 3.4. Genetic Testing and Insurance Prices. Suppose the likelihood that a person will get disease X is determined in large part (but not exclusively) by his or her genes. Initially, it Is impossible to determine who carries the gene for the disease, and many people spend $500 on special health insurance to cover the costs of treatment for the disease. Suppose scientists uncover the gene responsible for the disease and develop a simple test for the gene. (Related to Application 3.) a. Suppose the government passes a law that prevents insurance companies from getting the results of a customer's genetic test for X. Will the new price of X insurance be greater that or less than $500 ? b. Suppose insurance companies have access to the results of genetic tests and they require all customers to get the test. How will the insurance company change its price of X insurance?
Answers
The first scenario's price of X insurance will be greater than $500, while the second scenario's price of X insurance depends on the results of the genetic test.
a) If the government passes a law that prevents insurance companies from getting the results of a customer's genetic test for X, the new price of X insurance will be greater than $500.
b) If insurance companies have access to the results of genetic tests and they require all customers to get the test, the insurance company will change its price of X insurance as follows: if the test shows that a customer has the gene, the insurance company will raise the price of insurance to $800 to cover the expected treatment cost of $10,000 (with probability 1). In contrast, if the test shows that a customer does not have the gene, then the insurance company will lower the price of insurance to $100 to cover only administrative costs, assuming there is no risk of developing the disease.
According to these two scenarios, the first scenario's price of X insurance will be greater than $500, while the second scenario's price of X insurance depends on the results of the genetic test.
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At night the water temperature of the river is warmer than the air temperature. During the day the water temperature is cooler than the air temperature. Why is this true?
Answers
Q9. A person who is heterozygous for the cystic fibrosis allele moves to a small, isolated community where no one previously carried the allele. If the cystic fibrosis allele protects against tuberculosis the same way the sickle-cell allele protects against malaria, what should happen to the frequency of the cystic fibrosis allele in the community over time, and why? The cystic fibrosis allele should disappear from the population, because a single individual with the allele is not enough for it to proliferate. The cystic fibrosis allele should increase to a relatively high frequency, because heterozygotes with the allele will be more likely to survive than others. The cystic fibrosis allele should become fixed in the population, due to genetic drift. The cystic fibrosis allele should either disappear or increase in frequency, depending on chance as well as on tuberculosis prevalence and death rate. Use the following additional passage to answer the next question. Suppose you travel to the future, to a time when neither cystic fibrosis nor tuberculosis have caused any deaths for many generations. In all of these future populations, the cystic fibrosis allele still exists at a low frequency. Q10. You visit a huge city with millions of people. If you were to start sampling the cystic fibrosis allele from one generation to the next, what should happen to its frequency over the next few generations, and why? The allele frequency should change a lot from one generation to the next due to random genetic drift. The allele frequency should not change much from one generation to the next because the population is large. The allele frequency should steadily increase due to natural selection. The allele frequency should steadily decrease due to natural selection.
Answers
The cystic fibrosis allele should grow more prevalent because heterozygotes bearing the gene will live longer than other heterozygotes.
Cystic fibrosis is a genetic disorder caused by mutations in the CFTR gene, which affects the function of cells that produce mucus, sweat, and digestive juices.
Heterozygotes with one copy of the CFTR allele are generally healthy and don't show symptoms of the disease, but those with two copies of the allele will develop cystic fibrosis.
The passage states that the cystic fibrosis allele protects against tuberculosis, which means that heterozygotes with one copy of the allele will be more resistant to the disease and more likely to survive and reproduce than others. This will increase the frequency of the cystic fibrosis allele in the population over time.
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1) Which of the following is a piece of biochemical evidence for all for all species that supports the theory of evolution from a common ancestor?a) aerobic respirationb) storage of DNA in the nucleic) production of the same types of proteinsd) use of the same genetic code
Answers
One biochemical evidence that supports the theory of evolution that says that we all come from a common ancestor is the fact that all organisms use the same genetic code for the translation of proteins, for example, the codon AUG codes for the amino acid methionine in all organisms.
This means D would be the right answer.
Which is the missing label?
Answers
Answer:
Picture? to the question or options.
Explanation:
What does the ER do to the protein?
Answers
Answer: It is the entrance that transports proteins in the golgi bodies.
Explanation: The ER takes in proteins and sands them into golgi body packages that with then go on route to their destinations. (EX: The ER sends proteins into the golgi bodies, which then transport the proteins to the cell membrane.)
Answer:
transports proteins in the golgi bodies.
Explanation:
cushing's disease is a result of which of the following? cushing's disease is a result of which of the following? hyposecretion of mineralocorticoids hypersecretion of epinephrine and norepinephrine hypersecretion of glucocorticoids hyposecretion of corticosteroids
Answers
Cushing's disease is a hormonal disorder characterized by the excessive secretion of glucocorticoids, specifically cortisol, in the body.
Cortisol plays a crucial role in the body's response to stress and helps regulate various physiological functions. However, prolonged exposure to high levels of cortisol can have detrimental effects on the body.
Cushing's disease is typically caused by the presence of a tumor in the pituitary gland, a small gland located at the base of the brain.
This tumor leads to the overproduction of cortisol, disrupting the normal hormonal balance.
The symptoms of Cushing's disease can be severe and may include obesity, hypertension, diabetes, mood disorders, and more.
To address Cushing's disease, treatment options often involve surgical intervention to remove the tumor causing the excessive cortisol production. In some cases, medications may be prescribed to reduce cortisol levels and alleviate the associated symptoms.
Early diagnosis and appropriate management are crucial to prevent complications and improve the overall well-being of individuals with Cushing's disease.
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Imagine that you fill a shallow tray with water and place a drop of red ink in one end of the tray and a drop of green ink in the other end. Which of the following is TRUE at equilibrium?
(A) The red ink is uniformly distributed in one half of the tray, and the green ink is uniformly distributed in the other half of the tray.
(B) The red and green inks are both uniformly distributed throughout the tray.
(C) Each ink is moving down its concentration gradient.
(D) The concentration of each ink is higher at one end of the tray than at the other end.
(E) No predictions can be made without knowing the size of the ink molecules.
Answers
When you fill a shallow tray with water and place a drop of red ink in one end of the tray and a drop of green ink in the other end. The following is true at equilibrium is B. The red and green inks are both uniformly distributed throughout the tray.
At equilibrium, the ink molecules will move from the region of higher concentration to the region of lower concentration until the concentration of both the red and green ink is uniform throughout the tray. Therefore, the correct option is (B).Option (A) is incorrect because it predicts that the red ink will be uniformly distributed in one half of the tray, and the green ink will be uniformly distributed in the other half of the tray.
However, at equilibrium, the ink molecules will move towards the region of lower concentration until both the red and green ink are uniformly distributed throughout the tray. Option (C) is incorrect because it suggests that each ink is moving down its concentration gradient. However, both inks are moving down their respective concentration gradients, from regions of higher concentration to regions of lower concentration, until both are evenly distributed throughout the tray.
Option (D) is incorrect because it states that the concentration of each ink is higher at one end of the tray than at the other end. However, both inks will spread out until their concentration is the same throughout the tray. Option (E) is incorrect because the size of the ink molecules is not a relevant factor in this scenario as it does not influence the behavior of ink molecules during diffusion. Therefore, the correct answer is (B) The red and green inks are both uniformly distributed throughout the tray.
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how many lionfish spines are used in herbicide potion
Answers
Answer:
4 spines
Explanation:
4 Lion fish spines are used in herbicide portion in the Harry potter games. It was then mixed with standard ingredients.
What was the herbicide portion in Harry Potter ?Harry started opening the packages of goods. He had a few fresh quills, a dozen rolls of parchment, and refills for his potion-making gear in addition to The standard book of Spells, Grade 4 by Miranda Goshawk; he had run out of belladonna essence and the spine of lionfish. "Harry Potter looks through his school supply.
The lionfish's lengthy, spaced-apart vertebrae are known as the spine. Either the spines were used intact or they were powdered. In addition to being a component of the Herbicide Potion, they may be utilized to make healing potions like the Wiggenweld Potion.
Certain stores, especially the Apothecary in Diagon Alley, sold the ingredient for 2 Galleons for 16 bottles. Hence, they added 4 lionfish spines in the herbicide portions.
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Do you think that governments should institute measures to control the human population? Please don’t send me those file things. Please just give me the answer.
Answers
The temperature is some 30C. The humidity stifling, the noise unbearable. In a yard between two enormous tea-drying sheds, a number of dark-skinned women patiently sit, each accompanied by an unwieldy looking cloth sack. They are clad in colourful saris, but look tired and shabby. This is hardly surprising - they have spent most of the day in nearby plantation fields, picking tea that will net them around two cents a kilo - barely enough to feed their large families.
Vivek Baid thinks he knows how to help them. He runs the Mission for Population Control, a project in eastern India which aims to bring down high birth rates by encouraging local women to get sterilised after their second child.
As the world reaches an estimated seven billion people, people like Vivek say efforts to bring down the world's population must continue if life on Earth is to be sustainable, and if poverty and even mass starvation are to be avoided. There is no doubting their good intentions. Vivek, for instance, has spent his own money on the project, and is passionate about creating a brighter future for India.
But critics allege that campaigners like Vivek - a successful and wealthy male businessman - have tended to live very different lives from those they seek to help, who are mainly poor women.
These critics argue that rich people have imposed population control on the poor for decades. And, they say, such coercive attempts to control the world's population often backfired and were sometimes harmful.
Population scare
Most historians of modern population control trace its roots back to the Reverend Thomas Malthus, an English clergyman born in the 18th Century who believed that humans would always reproduce faster than Earth's capacity to feed them.
Giving succour to the resulting desperate masses would only imperil everyone else, he said. So the brutal reality was that it was better to let them starve.
Rapid agricultural advances in the 19th Century proved his main premise wrong, because food production generally more than kept pace with the growing population.
But the idea that the rich are threatened by the desperately poor has cast a long shadow into the 20th Century.
From the 1960s, the World Bank, the UN and a host of independent American philanthropic foundations, such as the Ford and Rockefeller foundations, began to focus on what they saw as the problem of burgeoning Third World numbers.
The believed that overpopulation was the primary cause of environmental degradation, economic underdevelopment and political instability.
Massive populations in the Third World were seen as presenting a threat to Western capitalism and access to resources, says Professor Betsy Hartmann of Hampshire College, Massachusetts, in the US.
From which of the following does the basic structure of hair and nails form?
a.
sweat
c.
collagen
b.
melanin
d.
keratin
Answers
Answer: D. Keratin
Explanation: Keratinocytes (pronounced: ker-uh-TIH-no-sites) make keratin, a type of protein that's a basic component of hair, skin, and nails. Keratin in the skin's outer layer helps create a protective barrier.
Karen has 47 chromosomes but no apparent abnormalities. What is true about Karen?
O A. She has aneuploidy.
O B. She has monosomy.
O C. She will die young.
OD. She has a cleft palate.
Answers
Answer:
A. She has aneuploidy.
Explanation:
remember doing this a while back, got it right.
The statement that is true about Karen's abnormality is that she has aneuploidy. Details about aneuploidy can be found below.
What is aneuploidy?Aneuploidy is a chromosomal abnormality whereby an organism possesses a chromosome number that is not an exact multiple of the haploid number of that organism.
In humans like Karen, the haploid number of chromosomes in each gamete cell is 23. This means that the number of chromosomes that is expected to be in the somatic cells is 23 × 2 = 46 chromosomes.
However, according to this question, Karen has 47 chromosomes but no apparent abnormalities. This suggests that she posseses aneuploidy.
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5. What is the ratio of carbon:hydrogen:oxygen
atoms?
Answers
Answer:
1:2:1
Explanation:
Modern conceptualization of the modal model asserts that information processing involves at least two kinds of memory: working memory and long-term memory (LTM).Working memory
A)has the same capacity to hold items as LTM.
B)differs from LTM in how easily one can access the stored items.
C)uses the same rehearsal mechanisms as LTM.
D)has no discernible effect on functioning outside the laboratory.
Answers
The modern conceptualization of the modal model asserts that information processing involves at least two kinds of memory: working memory and long-term memory (LTM).
Among the given options, the most accurate statement is that working memory differs from LTM in how easily one can access the stored items (B).
Working memory is a limited-capacity system that temporarily holds and manipulates information for cognitive tasks. It has a smaller capacity compared to LTM, which can store a vast amount of information for a longer duration. Working memory is involved in the active processing and manipulation of information, while LTM is responsible for the storage of information over an extended period.
Unlike LTM, working memory is more susceptible to interference and decay, meaning that the stored items in working memory are less easily accessible and tend to be lost or overwritten more quickly. Working memory requires active rehearsal mechanisms, such as repeating or mentally manipulating information, to maintain it. On the other hand, LTM relies on different mechanisms for encoding, storage, and retrieval.
Regarding the other options, working memory does not have the same capacity to hold items as LTM (A), as it has a more limited capacity. Working memory and LTM do not use the same rehearsal mechanisms (C), as working memory relies on active and temporary manipulation of information, while LTM involves encoding and storage processes. Lastly, working memory has a significant effect on functioning outside the laboratory (D) as it plays a crucial role in various cognitive tasks and daily functioning.
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If you could attach fluorescent marker tags to the enzyme that transfers the acetyl group from acetyl CoA to oxaloacetate, and then detect that fluorescence wit which part of a cell would you predict to observe the fluorescence? A. in the mitochondrial intermembrane space B. in the mitochondrial matrix C. embedded in the outer mitochondrial membrane D. embedded in the inner mitochondrial membrane E. in the cytoplasm
Answers
The transfer of the acetyl group from acetyl CoA to oxaloacetate occurs in the mitochondrial matrix during the process of the citric acid cycle, also known as the Krebs cycle. Option B is the correct answer.
The mitochondrial matrix is the space enclosed by the inner mitochondrial membrane, where many metabolic reactions take place. Since the enzyme responsible for this transfer is involved in the citric acid cycle, it is located within the mitochondrial matrix. By attaching fluorescent marker tags to this enzyme, the fluorescence would be observed in the mitochondrial matrix, indicating the presence and activity of the enzyme in that specific compartment of the cell.
Therefore, the fluorescence would be detected in the mitochondrial matrix (Option B).
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which is an example of kinect energy
Answers
Answer:
A
Explanation:
Kinetic energy is the energy of mass in motion, a skateboard rolling across the street is moving, therefore it has kinetic energy.
Answer:
A: a skateboard rolling across the street1) What is the function of a protein? A) provides a quick supply of energy, main source of energy B) dissolves and carries nutrients, removes waste, and regulates body temperature C) builds new tissues antibodies, enzymes, hormones, and other compounds: repairs damage D) facilitate use of other nutrients involved in regulating growth and manufacturing hormones
Answers
(c) building new tissues antibodies, enzymes, hormones, and other compounds is the function of a protein.
what is enzymes?Proteins called enzymes serve as biological catalysts by quickening chemical reactions. Substrates are the molecules that enzymes can interact with, and the enzyme changes the substrates into other molecules known as products.
what are tissues ?A collection of cells with similar structures and functions is referred to as a tissue. The intercellular matrix, a nonliving substance, fills the spaces between the cells. There might be a lot of this in some tissues and not much in others.
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Which part of a cell synthesises proteins?
Answers
Answer:
Ribosomes are the sites in the cellsell in which protein synthesis takes place.