If a cell has 18 chromatids, how many duplicated chromosomes does it have?
(A) 18
(B) 9
(C) 36
(D) 6
Answers
Answer:
C po
Explanation:
no explanation hehe
Related Questions
which of the following enzymes are directly involved in dna repair mechanisms? 1) dna photolyase 2) o6-methylg methyl transferase 3) ap endonuclease 4) helicase ii
Answers
The correct answer is 1, 2, and 3.The following enzymes are directly involved in DNA repair mechanisms:
DNA photolyase: It is involved in the repair of DNA damage caused by exposure to ultraviolet (UV) light. It uses light energy to break the bonds between pyrimidine dimers, which are formed by the covalent linkage of two adjacent pyrimidine bases in DNA repair mechanisms
O6-methylguanine methyltransferase: It is involved in the repair of DNA damage caused by the alkylating agents, which add alkyl groups to the nitrogen atoms of guanine bases in DNA. This enzyme removes the alkyl group from the O6 position of the guanine base, thereby restoring its normal structure.
AP endonuclease: It is involved in the base excision repair (BER) pathway of DNA repair. This enzyme recognizes and cleaves the DNA strand at the site of a damaged or missing base, creating an apurinic/apyrimidinic (AP) site. This site is further processed by other enzymes in the BER pathway to restore the normal DNA sequence.
Helicase II: It is involved in the nucleotide excision repair (NER) pathway of DNA repair. This enzyme recognizes and unwinds the DNA double helix at the site of a bulky DNA lesion, allowing other enzymes in the NER pathway to excise and replace the damaged DNA segment.
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Rudy has chronic trouble staying awake in class. What part of the brain is most likely responsible for rudy’s drowsiness?
Answers
If Rudy has chronic trouble staying awake in class, then the part of the brain that is most likely responsible for his drowsiness is the reticular formation.
What is the reticular formation?The reticular formation is a network that connects or links the spinal cord and the brain in the human nerve system, which is involved in different functions and is known to have an evolutionary meaning in the primate taxonomic group.
This area (the reticular formation area) is associated with different roles such as for example the sensory function, the motor function, behavioral issues, and also some type of emotional cues.
Therefore, with this data, we can see that the reticular formation is a network in the human nervous system that plays different functions and is responsible for the drowsiness of an individual, as well as motor functions or behavioral cues.
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why are scientists researching scorpions?
Scientists are looking for ways to take the venom out of scorpions.
Scientists think scorpion venom might have medical benefits.
Scientists want to figure out what type of venom is the deadliest.
Scientists are trying to develop an anti-venom to help people who get stung.
Answers
Scientists are researching scorpions because Scientists think scorpion venom might have medical benefits, 2nd option.
Why are scorpion venoms important?Scientists in laboratories are discovering the usefulness of venomous proteins that can be used medicine. Success has been recorded in the treatment of brain tumor with scorpion venom. When the venom is introduced to healthy cells and nerve they block signals from cancerous cells, an example is chlorotoxin.
It is also known to be effective as a pain reliever and treatment of illnesses like lupus and rheumatoid arthritis and that they probably contain antibacterial properties.
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match each product of pyruvate metabolism with the condition under which it is produced.
Aerobic oxidation __
Fermentation in human mucle __
Fermentation in yeast and bacteria __
Answers
(When exposed to oxygen, human cells do aerobic respiration, which produces acetyl CoA. Human cells may ferment lactic acid in the absence of oxygen, producing lactate.
Lactate: fermentation in human muscle
Ethanol: fermentation in yeast and bacteria
Acetyl CoA: aerobic oxidation
Alcohol fermentation occurs under anaerobic settings and creates ethanol in yeasts and many bacteria.) Under aerobic conditions, pyruvate can diffuse into mitochondria.
where it enters the citric acid cycle and generates reducing equivalents in the form of NADH and FADH2. These reducing equivalents then join the electron transport system, producing 32 ATP per glucose molecule.
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What did you observe about the sample of the pipe substance? what did you observe about the sample of fertilizer? what did you observe about the sample of the reddish brown substance?
Answers
The sample of the pipe substance showed signs of corrosion and rust. The sample of fertilizer had a high concentration of nitrogen and phosphorus. The sample of the reddish brown substance was identified as iron oxide, a common product of combustion.
About Iron OxideIron oxide is a chemical compound consisting of iron and oxygen. So far, 16 compounds of iron oxide and oxyhydroxide have been found. Iron oxides and oxide-hydroxides are found in nature and play an important role in geological and biological processes.
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PLEASE HELP QUICKLY!
Which is a disadvantage of molting in arthropods?
A. The arthropods blend into their environment as they go through the process.
B. The new exoskeleton can sometimes be too small, requiring multiple molts.
C. The arthropods are more easily caught and eaten during the process.
D. The new exoskeleton is not usually as strong as the older one.
Answers
Answer: The answer is C. The arthropods are more easily caught and eaten during the process.
Explanation: If you search the answer you’ll get: Approximately 85% of arthropod deaths occur during molting. The insect is extremely vulnerable to predators during and right after the shedding of its old skin.
Answer:
C
Explanation:
the nutrient essential for synthesis of several blood clotting factors is
Answers
The nutrient essential for synthesis of several blood clotting factors is vitamin K.
Vitamin K is a fat-soluble vitamin that is necessary for the production of proteins that are involved in blood clotting, including prothrombin and other clotting factors. Without vitamin K, blood clotting may be impaired, which can lead to excessive bleeding and other complications.
The nutrient essential for the synthesis of several blood clotting factors is vitamin K. Blood clotting, also known as coagulation, is a complex process involving a series of chemical reactions that result in the formation of a fibrin clot. Vitamin K is required for the synthesis of several proteins involved in the blood clotting process, including prothrombin and factors VII, IX, and X.
These proteins require vitamin K-dependent post-translational modifications to become functional. Without adequate vitamin K intake, blood clotting may be impaired, leading to increased bleeding and bruising. Good dietary sources of vitamin K include leafy green vegetables (such as kale, spinach, and broccoli), liver, and fermented foods (such as natto).
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A type of agglutination test in which you are looking for an antibody in the patient serum and the reagent contains an antigen attached to a latex particle would be considered: A. Direct. B. Indirect (passive). C. Reverse passive. D. Not an agglutination assay
Answers
An indirect agglutination test is used to detect the presence of antibodies in a patient's serum. The reagent used in this type of test contains an antigen attached to a latex particle. The correct answer to this question is B. Indirect (passive).
When the patient's serum is mixed with the reagent, if there are antibodies present, they will bind to the antigen on the latex particle and cause agglutination. This indicates a positive result for the presence of antibodies.
Direct agglutination tests, on the other hand, are used to detect the presence of antigens in a patient's sample. Reverse passive agglutination tests are used to detect the presence of antigens using antibodies attached to a latex particle.Therefore, the correct answer is B. Indirect (passive).
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Which principle allows us to assign dates to events on the geologic time scale?
faunal succession
extinction
radioactive decay
Answers
Answer:
radioactive decay
Explanation:
because i love you and subscribe
A unknown element is a gas at room temperature, has 8 valence electrons and 22 neutrons the element is most likely
Answers
Answer:
Argon
Explanation:
Argon is a chemical element which is a gas at room temperature, has 8 valence electrons and 22 neutrons. This element belongs to the noble gas elements group.
What is Argon?Noble gas is any of the rare gases that include helium, neon, argon, krypton, xenon, and sometimes radon also and that exhibit great stability and extremely low reaction rates than other elements in the periodic table.
Argon is a chemical element with the symbol Ar and it has an atomic number of 18. It is in the group 18 of the periodic table and it is a noble gas. Argon is the third-most abundant gas in the Earth's atmosphere, at 0.9340 ppmv. It is more than twice as abundant as that of water vapor, 23 times as abundant as carbon dioxide, and more than 500 times as abundant as neon gas. Argon is the most abundant noble gas in the Earth's crust, which comprises about 0.00015% of the crust.
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Examine the weather map.
Seattle ings
4 73/53
87/59
San Francisco
75/55
3
L 2
Denver
89/60
H
Minneapolis
82/59 Detroit New York
88/65 80/71
Washington
D.C.
86/70
1
Houston
9176
Chicago
87/65
91
H
Atlanta
92/71
Miami
93/76
Which high-temperature range is most likely
represented by the shaded area labeled 1?
O 60°F to 69°F
O 70°F to 79°F
O80°F to 89°F
O 90°F to 99°F
Answers
The high-temperature range most likely represented by the shaded area labeled 1 is D. 90°F to 99°F.
What temperature occurs in this area?The shaded area is located in the southern United States, which is known for its hot summers. The high temperatures in this region are typically in the 90s or even 100s during the summer months.
The other high-temperature ranges are not as likely for this region. The 60°F to 69°F range is too cold for the summer, and the 70°F to 79°F range is too mild. The 80°F to 89°F range is possible, but it is less likely than the 90°F to 99°F range.
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part of earth that contains all ecosystems
Answers
Answer:
biosphere
Explanation:
biosphere
The biosphere is made up of the parts of Earth where life exists—all ecosystems.
I think the answer is the Biosphere
Hi, what is the Calvin cycle or light-independent reaction, and what is the light-dependent reaction? pls, explain what happens on the stage.
Answers
Answer:
The Calvin Cycle is a process used by plants to turn Carbon Dioxide from the air into Sugar. Sugar is the food that autotrophs need to grow.
The light dependant reaction is
The reaction which depends on sun light and ends right after light goesLike NADPH formation
In RNA, A pairs with ____, and C pairs with ____. (10 points)
A. C;A.
B. U;G.
C. T;U.
D. G;T
Answers
Answer:
The answer is B
Explanation:
A pairs with U and C pairs with G
Which methods are most accurate in making forecasts? Why do you think so?
Answers
Answer:
usually using the barometer helps because it determines what front is approaching resulting in the weather forecast
Explanation:
Weather forecasts are often very accurate, but sometimes there might be an unexpected change in one of the variables, causing a mistaken prediction
Statistical models and machine learning algorithms are often considered the most accurate methods for making forecasts due to their ability to analyze large amounts of data and identify patterns and trends.
Forecasting accuracy depends on data quality, phenomena complexity, and historical data. Certain procedures are more accurate than others.
When historical data is available and a pattern or trend is present, statistical approaches like time series analysis and regression models can provide accurate projections. Mathematical algorithms find patterns, correlations, and trends in data to forecast the future.
Artificial neural network-based machine learning methods can also improve predicting accuracy. These algorithms learn complicated data patterns and correlations, adapt to changing conditions, and generate accurate predictions.
Expert judgement and qualitative data can improve forecasts. Companies can enhance forecasts by combining statistical methodologies with expert knowledge.
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If Earth has 150,100,000 km^2 of
land area, how much land area is included in the
biodiversity hotspots?
PLS HELP NEED FOR TODAY!!!
Answers
Explanation:
A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]To qualify as a biodiversity hotspot on Myers 2000 edition of the hotspot-map, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.[6] Around the world, 36 areas qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very high share of those species as endemics. Some of these hotspots support up to 15,000 endemic plant species and some have lost up to 95% of their natural habitat.[7]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]To qualify as a biodiversity hotspot on Myers 2000 edition of the hotspot-map, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.[6] Around the world, 36 areas qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very high share of those species as endemics. Some of these hotspots support up to 15,000 endemic plant species and some have lost up to 95% of their natural habitat.[7]Biodiversity hotspots host their diverse ecosystems on just 2.4% of the planet's surface,[2] however, the area defined as hotspots covers a much larger proportion of the land. The original 25 hotspots covered 11.8% of the land surface area of the Earth.[1] Overall, the current hotspots cover more than 15.7% of the land surface area, but have lost around 85% of their habitat.[8] This loss of habitat explains why approximately 60% of the world's terrestrial life lives on only 2.4% of the land surface area.Cells in the roots divide many times as the root grows longer and thicker. With each cell division, the chromosomes are divided between two daughter cells, yet the number of chromosomes in each cell does not change. What process ensures that the normal number of chromosomes is restored after each cell division? During which part of the cell cycle does this process occur?
Answers
The chromosomal content is duplicated and maintained through the synthesis of new DNA strands or DNA replication which occurs during the S-phase of cell cycle.
What is Mitosis?Cells in an organism undergo division to form new daughter cells which are similar to the parent cell. This process is called cell division. Cell division is of two major types: Mitosis and Meiosis.
Mitosis is known as equational division whereas meiosis is known as reductional division. Mitosis produces two daughter cells with the same chromosomal content whereas meiosis produces four daughter cells with reduced to half of the chromosomal content.
The chromosomal content in the cell is divided and maintained through DNA replication. Duplication of the chromosomal content occurs in the S-phase of the cell cycle. S-phase is known a synthesis phase. During this phase, the chromosomal content of the parent cell is duplicated and transferred to the daughter cells.
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Microsporangia in flowering plants are located in the.
Answers
Answer:
Microsporangia are located in the stamen of the flower, where the male gametophyte (pollen grains), or male cell, is formed.
portion of rna molecule that codes for making a protien
Answers
Critically explain three aspects of growth
Answers
-toddler.
-childish.
- teenager.
-adult.
- older (over 50 years)
autism
What does the theory of plate tectonics say about the earth’s surface?
The earth is one solid piece.
The earth is mostly covered in water.
The earth is broken into many pieces.
The earth is very thick.
Answers
Answer:
The Earth is broken into many pieces
1. Define los siguientes pares de conceptos a partir de su semejanzas y diferencias A. ADN – ARN B. Acido Nucleico – Nucleótido C. Aminoácido – Proteína
Answers
Answer:
Las similitudes y diferencias entre ADN - ARN, ácido nucleico - nucleótido, aminoácido - proteína son las siguientes.
Explicación:
El ADN es similar al ARN debido a la presencia de cuatro bases nitrogenadas. La diferencia entre que tiene tres mismas bases nitrogenadas mientras que una es diferente. El ADN es bicatenario mientras que, por otro lado, el ARN es monocatenario. El ADN se considera más estable en comparación con el ARN sobre la base de su estructura.
Los nucleótidos son los componentes principales de los ácidos nucleicos, mientras que los ácidos nucleicos son los componentes básicos de la vida. Los nucleótidos están formados por nucleobase, azúcar de carbono y fosfato, mientras que, por otro lado, los ácidos nucleicos están formados por nucleótidos.
Los aminoácidos son los componentes básicos de las proteínas, lo que significa que las proteínas están hechas de aminoácidos. Las proteínas están conectadas entre sí, mientras que los aminoácidos libres no están conectados.
rrrrrrrrrrrrrrrrrrrrrrrr
Answers
ŕrrrrrrrrrrřrrrrrrrrrrrrrrr
Answer:
okk
Explanation:
1. Do you think manufacturers of computers and television sets and other forms of e-waste
(Core Case Study) should be required to take them back at the end of their useful lives for
repair, remanufacture, or recycling? Explain. Would you be willing to pay more for these
products to cover the costs of such a take-back program? If so, what percent more per
purchase would you be willing to pay for electronic products?
Answers
1. The correct answer to the task above about e-wastes is that it should be recycled.
2. I won't be willing to pay more for the cost of take-back materials of devices simply because these devices still have components which will still be useful for the manufacturers.Why wastes of electronic devices should be taken back for repair or recycling.Computers, and others electronic devices; when they got broken or spoilt, needs to be recycled simply because the activities of of recycling back the devices makes more raw materials available for another re-manufacturing.
In conclusion, it can therefore be deduced from the explanation given above that recycling of substances is one of best ways of making them much more available where they are scarce.
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The stomach is protected from self-digestion by the ______________. When this breaks down, _________ can form and be painful.
Answers
The stomach is protected from self-digestion by the mucus lining. When this breaks down, ulcers can form and be painful.
Ulcers refer to a small sore or lesion that develops in the lining of the stomach or duodenum (small intestine) or oesophagus. Ulcers are typically due to inflammation caused by bacteria known as Helicobacter pylori (H. pylori) as well as by stomach acid. The stomach is protected from self-digestion by the mucus lining. When this mucus lining breaks down, ulcers can develop and cause discomfort and pain.
Ulcers can be caused by different factors, including:
Helicobacter pylori (H. pylori) infections
Excessive use of painkillers
Alcohol consumption
Smoking
Radiation therapy
Nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin
Infection with a type of bacteria known as Helicobacter pylori (H. pylori) is the most common cause of ulcers.
Ulcers can result in a variety of symptoms, which include:
Abdominal pain or discomfort
Bloating
Feeling of fullness, especially after eating
Heartburn or acid reflux
Nausea
Vomiting or retching, which may contain blood
Weight loss, loss of appetite
Difficulty swallowing
Frequent burping or hiccups, among others.
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How would the seasonal paths of the Sun change for a location that is more North of this latitude?
Answers
Answer:
At the North Pole, the sun is above the horizon for six straight months (March through September), spinning around in horizontal circles, reaching a maximum height of 23.5° above the horizon at the June solstice. As you travel southward in the northern hemisphere, the noon sun gets higher and higher.
Explanation:
Add the north pole the sun is above the horizontal for six straight months
After the first stages of development are complete, cells begin to divide in the same way that body cells divide throughout the rest
of the organism's life.
In this type of division, the cells
A. divide to form two different types of cells.
B. double in size and then divide to form two new cells.
C. triple in size and then divide to form two new cells.
D. divide without growing so the new cells are smaller than the original.
Answers
After the first stages of development are complete, cells begin to divide in the same way that body cells divide throughout the rest of the organism's life, in this type of division, the cells double in size and then divide to form two new cells, which is option B.
What is mitosis?Mitosis consists of several stages, including prophase, metaphase, anaphase, and telophase, and is essential for the growth and development of multicellular organisms, and it enables the body to produce new cells to replace damaged or dying cells, and it also allows the body to grow and develop. Mitosis is critical for tissue repair and regeneration, such as in the healing of a cut or injury, and without mitosis, the body would not be able to maintain its tissues and organs or repair damage caused by injury or disease.
Hence, in this type of division, the cells double in size and then divide to form two new cells, which is option B.
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Another source for sulfur is from pollution cases by man-made activities. These are mixed with water in the air falling in
Answers
Answer:
rain
Explanation:
Sulfur dioxide pollutants can be generated in the form of aerosols and acid rain. Acid rain is a type of acid deposition which results from the rain with has a pH of 5.7 (or even more acid). The process of oxidation of sulfur-containing compounds is the main cause for the generation of sulfur dioxide pollutants that are released into the atmosphere by human activities (e.g., as a combustion product from burning coal and other fossil fuels).
Explain the processes involved in the transportation of absorbed
nutrients throughout the body.
Answers
Answer:
Absorption: The process of absorbing nutrients occurs primarily in the small intestine. Once the food is broken down into smaller molecules through digestion, these molecules are absorbed into the bloodstream. For example, carbohydrates are broken down into simple sugars, proteins into amino acids, and fats into fatty acids and glycerol.
Circulatory System: The circulatory system, composed of the heart, blood vessels, and blood, plays a crucial role in transporting absorbed nutrients. The blood vessels form an extensive network that reaches all tissues and organs in the body.
Hepatic Portal System: After absorption, most of the nutrients are transported to the liver through a specialized system called the hepatic portal system. This system ensures that the liver, which performs various metabolic functions, receives a concentrated supply of nutrients before they are distributed throughout the body.
Bloodstream Transport: Once in the bloodstream, nutrients are carried by the plasma, the liquid component of blood. Different nutrients use specific mechanisms for transport:
Glucose: It is transported by facilitated diffusion or active transport, depending on the concentration gradient, with the help of insulin.
Amino Acids: They are transported through the bloodstream by specific carrier proteins.
Fats: Dietary fats are initially packaged into structures called chylomicrons and transported through the lymphatic system before entering the bloodstream. Once in the bloodstream, fats are carried by lipoproteins such as low-density lipoprotein (LDL) and high-density lipoprotein (HDL).
Distribution to Tissues: As the blood circulates, nutrients are distributed to various tissues and organs according to their specific needs. Nutrients are delivered to cells through the capillaries, the smallest blood vessels in the body, which have thin walls that allow for the efficient exchange of nutrients and waste products.
Cellular Uptake: Nutrients are taken up by cells through various mechanisms. For instance, glucose enters cells with the help of insulin, while amino acids are transported into cells through specific carrier proteins. Fats are taken up by cells through receptor-mediated endocytosis or by diffusion.
Metabolism: Once inside the cells, nutrients undergo metabolic processes to produce energy or build new molecules. Glucose, for example, can be metabolized through glycolysis, the Krebs cycle, and oxidative phosphorylation to generate ATP, the cell's energy currency.
Waste Removal: Metabolic byproducts, such as carbon dioxide and urea, are generated during nutrient metabolism. These waste products are transported back into the bloodstream and eventually eliminated from the body through the lungs (carbon dioxide) or the kidneys (urea).
It's important to note that different nutrients may have different transport mechanisms and pathways. The body's ability to efficiently transport and utilize absorbed nutrients is vital for maintaining proper functioning and overall health.
which of the following Mendel's laws best explains why the p generation produced two Black puppies
Answers
Answer:
Its Law of Segregation. Also please follow my instagram The_official_unleashed
Explanation:
Answer:
A)
Law of Segregation
Explanation: