Answer:
b
Explanation:
A patient with diseased tissues that remove wastes and toxic matter from the blood would require a kidney transplant. Matching a donor is essential to prevent immune rejection, and scientists are exploring growing organs from the patient's own cells to avoid this issue.
The group of tissues that removes wastes and toxic matter from the blood is primarily the kidneys. When these tissues are diseased, the patient would typically require a kidney transplant to replace the failing kidneys. For an individual requiring a transplant, finding a matching donor is crucial to prevent tissue rejection. This is due to the immune system potentially destroying the donor cells, recognizing them as foreign. Patients receiving bone marrow transplants, for instance, must have their own diseased marrow destroyed beforehand, and then donor stem cells are intravenously infused. However, in the case of a kidney transplant, the procedure involves connecting a donated kidney to the recipient's blood vessels and leaving the diseased kidneys in place if they're not causing complications.
Dialysis is an alternative treatment that filters blood using a machine, but it is not a cure for kidney failure. For patients with end-stage kidney disease, a kidney transplant is the ideal alternative to long-term dialysis. The main obstacle with transplantation is finding a donor that matches the patient's human leukocyte antigens (HLAs), which are critical for reducing the risk of rejection.
in pinus sp. male cone matured earlier than female cone . describe how this species the success of pollination
In pinus species male cone matured earlier than female cone because it male cone producing more pollen grain.
Explanation:
Pinus species don't have flowers who has nectar and pollen. Pine trees can’t attract bees and butterflies for pollination. Wind play vital role for pollination in pinus species tree.
The male cones produce producing pollen grains, which drift to the female cones on other trees. After few years mature the non-fertilized female pine cone mature to become the woody cones
Can someone help me pls....
Describe the chemical structure of a carbohydrate?
Answer:
Carbohydrates consist of the elements carbon (C), hydrogen (H) and oxygen (O) with a ratio of hydrogen twice that of carbon and oxygen. Carbohydrates include sugars, starches, cellulose and many other compounds found in living organisms. In their basic form, carbohydrates are simple sugars or monosaccharides.
:
The beaker in the diagram below has a selectively permeable membrane separating two solutions. Assume that both water and salt can pass freely through the membrane. When equilibrium is reached, will the fluid levels be the same as they are now? Explain.
Answer
The movement of water molecules across a selectively permeable membrane is known as osmosis. A substance that moves by passive transport tends to move away from the area where it is more concentrated. Diffusion and osmosis both regard the dispersion of particles. By definition, water is the only substance that undergoes osmosis.
hope that helps
When equilibrium is reached ; The Fluid level will be higher at solution A ( Side A )
Given that the solutions are separated by a selectively permeable membrane which allows only water and salt through it. and the solution in side A is a concentrated salt solution ( higher percentage of salt ( solute ) ) while the solution on side B is a dilute solution with a lesser percentage of salt and starch.
The salt and water from side B will move through the membrane into side A leading to the decrease in the fluid levels of Side B. This is because during osmosis the movement of water molecule is from a region of higher water concentration to a region of lower water concentration.
Hence we can conclude that When equilibrium is reached The Fluid level will be higher at solution A ( Side A ).
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Which of the following forces always exists between any two objects having mass?
A. Elastic Force
B. Contact Force
C. Gravitational Force
D. Magnetic Force
C
Gravity is an intrinsic property of matter. The higher the mass of an object the bigger the gravitational pull it has. Even small particles like protons and neutrons have gravitation force but is almost negligible because of the minute mass of the nuclear particles.
Explanation:
It is believed that gravity of created from the warping of space-time continuum by any object with mass.
Distance between two masses also affects the gravitational force between the two bodies and the force can be calculated by the formulae;
F = G * (M₁ – M₂) / r²
Whereby;
F = Gravitational force
Where G = Gravitational constant
M₁ = mass 1
M₂ = mass 2
r = distance between the 2 masses.
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Answer:
c
Explanation:
c
energy is needed to form glucose bonds true or false
Answer:
True. Energy is needed to form glucose bonds.
Solar energy is required to synthesize a molecule of glucose during the reactions of photosynthesis. In photosynthesis, light energy from the sun is initially transformed into chemical energy that is temporally stored in the energy carrier molecules ATP and NADPH
How could a plant spread its seeds? A An animal could eat fruit and spread the seeds. B A seed could get tangled in animal fur and be carried to a new place. C Seeds could float away in the wind. D all of the above
Answer:
The answer is All of the above
Explanation:
Answer:A
Explanation:
when are amino acids used instead of gluecose
Final answer:
Amino acids are used as an energy source instead of glucose in situations of carbohydrate and fat deficiency, such as fasting or starvation. They are converted into intermediates that enter the Krebs cycle for ATP production, but this can lead to muscle wasting and tissue damage if prolonged.
Explanation:
Amino acids are typically utilized for protein synthesis and other nitrogenous substances like nucleotides, rather than as a primary energy source. However, in situations where there is a deficiency of carbohydrates and fats, such as during fasting or starvation, amino acids can be mobilized as an alternative source of energy. This is because amino acids can be converted into metabolic intermediates that enter the Krebs cycle, leading to the production of ATP.
In normal conditions, glucose is the preferred energy source, and amino acids are reserved for growth and repair processes. Yet, during periods of prolonged fasting or insufficient caloric intake, the body can resort to breaking down proteins into amino acids for energy, which can lead to muscle wasting and tissue damage if persisted for extended periods. This shift happens because the body has no mechanism to store excess amino acids; they must either be used for protein synthesis or be catabolized for energy and excretion.
When a person farts in a elevator and you smell it one minute later ...
A) solvent
B) Diffusion
C) solute
D) osmosis
E) solution
Answer:
B) diffusion
okokokokoko
An astronomer has proposed a new theory about the evolution of the universe. What is the next step that the astronomer should take to make his theory reliable? A.allow other scientists to repeat the experiments to verify the results
B. publish the theory in a science magazine to let people know about it
C.discuss the theory on television to make it popular
D. explain the theory with models to make it more interesting
Answer:
Your correct answer is B. publish the theory in a science magazine to let people know about it.
Explanation:
Answer:
A) allow other scientists to repeat the experiments to verify the results
Explanation:
Got it right on the test. Plus, by allowing scientists to repeat the experiments help make it become a theory or law. Just because you publish it in some magazine won't make your theory reliable. You need repetition, experimenting, and proof.
What is Teddy's organization trying to accomplish?
Teddy is working for a nonprofit organization that urges people to stop using products with CFCs. Through this initiative, Teddy's organization hopes to reduce the concentration ______ of in the atmosphere.
Chlorine
Explanation:
I Got 5/5 Correct
Final answer:
Teddy's organization aims to decrease CFCs in the atmosphere in support of the Montreal Protocol's mission to restore the ozone layer, with signs of recovery noted despite challenges.
Explanation:
Teddy's organization is working to reduce the concentration of CFCs in the atmosphere. The initiative aligns with the goals of the Montreal Protocol, which is a global effort established in 1987 to phase out the use of CFCs that deplete the ozone layer.
Despite challenges, like the need for developing-country participation and the management of CFC "banks", there have been indicators of success such as observable signs of ozone recovery. Replacements for CFCs include hydrofluorcarbons (HFCs) and hydrochlorofluorocarbons (HCFCs), which are more benign to the ozone layer.
. Where is calcium carbonate found and how does it acts as a natural pH buffer?
Calcium carbonate:
The calcium carbonate is found in sea shells and the bones of sea creatures. And it is settled on layer of ocean. The pH level can be equilibrium with atmospheric [tex]CO_2[/tex]. There is constant concentration of [tex]CO_2[/tex] in the water.
The limestone and calcium carbonate is present in the rocks, streams, lakes is helps to maintain the constant pH in the minerals present in the rock react with excess acid in the water.
When the acids or bases react with the calcium carbonate ,there is the excess change in the pH. The mixture of calcium carbonate ions in the water to prevent the damage in acid rain.
Calcium carbonate is found in different forms and has various applications. It acts as a natural pH buffer in the human body by reacting with acids and bases to maintain the pH within a narrow range.
Explanation:Calcium carbonate is found in various forms and has multiple applications. In nature, it can be found in the form of limestone, chalk, and marble. It is also commonly used as an antacid to neutralize stomach acid and as an agricultural lime to correct acidic soil.
Calcium carbonate acts as a natural pH buffer due to its ability to react with acids and bases. In the human body, it is involved in the carbonic acid/carbonate buffering system, which helps regulate blood pH. When too much acid or base enters the body, calcium carbonate reacts to maintain the pH within a narrow range by either releasing carbon dioxide or combining with hydrogen ions or hydroxide ions.
How does a swim bladder help the ray finned fishes maintain buoyancy
Answer: Swim bladders of fish at depth help maintain buoyancy by regulating gas levels.
The blood type of Tamari’s blood type is A+ and that of her mother is B+. However, Tamari’s blood type is AB+. What is the correct explanation for this.
Answer AND Explanation:
The fact that the father has blood group A with rhesus factor positive and mother blood group B with rhesus factor, provides a possible scenario for Tamari to both the genes from the parents thus her blood is AB. Since both parents are rhesus positive, then Tamari's rhesus is likely to be positive. Gene A and B have equal degrees of dominance that is they are codominant and will both express themselves when present together as in both AB blood group.
Final answer:
Tamari's AB+ blood type comes from inheriting an A allele from her father and a B allele from her mother, given her mother's B+ blood type. Her father also contributes the Rh factor, making Tamari Rh positive (Rh+). This explains the AB+ blood type through the principle of codominance in the ABO blood group system.
Explanation:
The blood type of an individual is determined by the type of antigens present on the surface of their red blood cells. We can explain Tamari's blood type AB+ in the context of Mendelian genetics. The ABO blood group system is based on codominance, where two different alleles can be expressed at the same time.
According to the problem, Tamari has blood type AB+, and her mother has blood type B+. For Tamari to have an AB blood type, she must have inherited one A allele from one parent and one B allele from another. Since Tamari's mother has blood type B+, she would have either the genotype IBIB or IBi (where "i" stands for the O allele).
Tamari's AB+ blood type suggests one of her parents must have an A allele to contribute. This implies her father must provide the A allele, as well as the Rh positive factor since Tamari is Rh positive (Rh+).
Thus, Tamari's mother could be either genotype IBi or IBIB, and her father must have an A allele (either IAIA, IAi, or IAIB if he is type AB) and an Rh positive allele.
Lastly, for a type AB individual such as Tamari, she can only donate blood to others who are type AB, making her a universal recipient but not a universal donor. She has both A and B antigens
3. Seasonal changes on Earth are primarily caused by
the
A) parallelism of the Sun's axis as the Sun revolves
around Earth
B) changes in distance between Earth and the Sun
C) elliptical shape of Earth's orbit around the Sun
D) tilt of Earth's axis as Earth revolves around the
Sun
The answer you are looking for is D
The key cause of the changes in the Seasons of the Earth would be:
D). tilt of Earth's axis as Earth revolves around the Sun.
What are Seasonal Changes?
Seasonal changes are described as the changes in the seasons that are produced due to the association between the Sun and the Earth.
The earth takes a revolution throughout the year around the sun which results in the variation of the seasons throughout the year.
The key cause behind it is its tilted position at the degree of 23.5 which makes a particular area to be distant from receiving the sunlight adequately.
Thus, option D is the correct answer.
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In 1990, Carl Woese introduced the three
domain system for classifying living things,
after the advancement of DNA analysis
allowed for a comparison of species genetic
code. Which of the following is the best
explanation for why domains were added to
the previous system of classification?
C. Domains have always been included, they
were just made official recently.
B. New species are evolving too quickly to
keep up with the old system of classification
D. Some organisms, which were previously
characterized together, were determined to
be genetically very different.
A. The old system of classification was wrong
and needed to be corrected.
Answer:
D. Some organisms, which were previously characterized together, were determined to be genetically very different.
Explanation:
Domains are the highest taxons within the biological classification of living beings. Like other taxons, domains are used to group living beings in a scientifically based classification.
They were added to the classification system after the other taxons were already established. The presence of domains was necessary to group individuals in relation to evolutionary factors. This was necessary because some organisms, previously characterized together, were determined to be genetically very different.
The correct explanation for why domains were added to the previous system of classification is: C. Domains have always been included, they were just made official recently.
The historical context and the implications of Carl Woese's work:
1. Prior to Woese's work, the classification system was primarily based on morphological and physiological characteristics, which led to the grouping of organisms into kingdoms. The five-kingdom system, proposed by R.H. Whittaker in 1969, included the Monera, Protista, Fungi, Plantae, and Animalia kingdoms.
2. With the advent of DNA sequencing and analysis techniques, particularly the sequencing of the 16S rRNA gene, scientists were able to compare genetic information across a wide variety of organisms. This allowed for a more detailed and accurate understanding of the evolutionary relationships between different species.
3. Woese's research revealed that the prokaryotes, which were previously all classified within the Monera kingdom, actually comprised two distinct groups that were as different from each other as they were from eukaryotes. These two groups were the Bacteria and the Archaea.
4. The recognition of these two distinct domains, along with the domain Eukarya (which includes the Protista, Fungi, Plantae, and Animalia kingdoms), led to the establishment of the three-domain system. This system reflects the major evolutionary divergences in the history of life.
5. The three-domain system does not imply that the previous systems were entirely wrong; rather, it represents a refinement of our understanding of the tree of life based on new genetic evidence. The domains were not newly created entities but were recognized and formalized as a result of advances in molecular biology.
6. The addition of domains to the classification system was a significant change that acknowledged the deep genetic differences between the Bacteria, Archaea, and Eukarya. It provided a more accurate framework for understanding the diversity of life and the relationships between different organisms.
In summary, domains were added to the classification system to reflect the profound genetic differences that had been discovered through DNA analysis, differences that were not apparent through morphological and physiological studies alone. The three-domain system, therefore, represents a more nuanced and genetically informed approach to classifying living organisms.
Which of the following are the natural barriers that help keep infection out?
Question 2 options:
a)
Tears and skin
b)
masks
c)
mucous membranes and skin
d)
Both A and C
How do pathogens spread?
Question 3 options:
a)
Indirect contact
b)
Direct contact
c)
Animal or insect
d)
contaminated food or water
e)
All of the above
The answer to the first question is mucous membranes and skin
The answer to the second question is All of the above
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Can you guys answer these 3 questions please? Or at lease one person for each question please!
Answer:
Answer for third question.
Explanation:
The permanent destruction of forests to use the land or trees is known as deforestation. Deforestation takes place due to a number of reasons like natural causes and human activities. The main cause for deforestation is overpopulation. Overpopulation results in an increase in global needs which leads to expansion of infrastructures, industries, agricultural needs and thus deforestation. Other reasons for deforestation are infrastructure expansion , logging for wood based industries, farming, mining etc. Deforestation causes drastic changes in the environment. The environmental problems which results from widespread deforestation include climatic changes, loss of biodiversity, flooding, increase in greenhouse gas emission, acidic oceans, air and water pollution etc. Deforestation results in global warming. Planting trees reduce the effects of deforestation by preventing soil erosion and pollution. The other ways to lessen the effects of deforestation includes recycling and using of recycled products. Reduce the usage of paper and use wood alternatives like hemp, bamboo, wood composites etc for construction and remodeling products. Also we can raise awareness in the community against deforestation through campaigns
Which organelle stores genetic information?
What is malaria?biology
Answer:
Malaria can be described as a disease which is caused by a parasitic organism. The Anopheles mosquito carries the parasite Plasmodium in it. When this mosquito bites a human being, the parasite gets transferred into the blood of the person causing malaria. Before entering the blood cells, the plasmodium travel to the liver where they get matured.
Malaria is a life-threatening disease which kills many humans each year, especially people living in underdeveloped countries.
Malaria is a zoonotic disease caused by Plasmodium parasites transmitted through Anopheles mosquito bites, leading to severe symptoms and sometimes death. Drug resistance has made treatment challenging in some regions, but prevention and prompt treatment can reduce mortality.
Malaria is an infectious zoonotic disease caused by protozoan parasites of the genus Plasmodium, which are transmitted to humans through the bite of an infected female Anopheles mosquito. The disease is characterized by symptoms such as cyclic high fevers, chills, flu-like symptoms, and severe anemia. There are different species of Plasmodium, but Plasmodium falciparum is the most deadly. The life cycle of the malaria parasite involves replication within the liver and destruction of erythrocytes (red blood cells), causing the observed symptoms. Malaria treatments vary geographically, owing to the evolution of drug resistance in some parts of the world.
Prevention of malaria includes methods such as mosquito netting and vector control to reduce mosquito populations and thereby interrupt the transmission cycle. Prompt and efficient treatment is crucial, and although Plasmodium falciparum malaria can have a low mortality rate when treated, it remains a significant cause of death, especially in the tropics.
where does cellular respiration take place?
Answer: The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion. The folds in the inner membrane are called cristae.
Explanation:
Cellular respiration takes place within the cells of living organisms, specifically within the mitochondria.
What is Mitochondria ?Mitochondria are membrane-bound organelles found in eukaryotic cells (cells with a nucleus), and they are often referred to as the "powerhouses" of the cell because they are responsible for generating energy in the form of adenosine triphosphate (ATP) through the process of cellular respiration.
This process involves the breakdown of glucose and other organic molecules to produce ATP, which is used as a source of energy for various cellular activities.
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Hunger is best described as?
Answer:
live microorganisms naturally found in or supplemented to food products.
Explanation:
in your own words, define the term science.
According to the definition of science, it is a process and application of knowledge to an understanding of the natural and social worlds, as well as a methodical technique dealing with evidence.
Science is derived from the Latin word "scientia," which meaning "knowledge." Science is defined as the act of pursuing knowledge. It mostly deals with factual fact findings obtained via verified research studies, as well as fields of science founded in biology, physics, and chemistry.
Science is described as the observation, understanding, inquiry, and experimental and theoretical approaches to any natural phenomenon that explain it. It can be a method of learning about the natural world by observing and thinking.
Thus, Science primarily deals with evidence, which is supported by theory and provides knowledge of any particular subject.
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what's the difference between a fungus and a parasite?
Difference between fungus and parasite:
1. Some mushrooms are considered parasites.
2. The fungus belongs to a single Kingdom called Fungi, while parasites belonging to several Kingdoms include Bacteria, Protozoa, Fungi, and Animalia.
3. All parasites cause injury or disease to their host, whereas only a few species of fungi cause disease in humans and plants.
4. Unlike parasites, certain fungal species have commercial value.
Explanation:
The fungus is a plant that does not have chlorophyll so it is heterotrophic. Fungi are unicellular and multicellular. The body consists of threads called hyphae.
Mushrooms have 2 reproductive organs, namely Asexual and Sexual
1. Asexual Reproduction, namely Asexual Mushrooms that reproduce will produce spores, buds, and fragmentation.
2. Sexual Reproduction, namely mushrooms that reproduce sexually using reproductive organs such as Zigospores, Askospores, and Basidiospores.
Small animal parasites that can reduce the productivity of the animals they are riding. Parasites can attack humans and animals, such as attacking human skin.
Bacteria-including Kingdom:
1. Protozoa
Protozoa are cellular organisms whose nature is eukaryotic with no cell walls and heterotrophs and can also move (motile).
2. Fungi
The name regnum is from a large group of heterotrophic eukaryotic living things that digest food outside the body and then absorb nutrient molecules into its cells.
3. Animalia
Having eukaryotic cells is composed of many cells which have differentiated to form tissue.
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Grade: Middle School
Subject: Biology
Keyword: Fungus and parasite
Describe the major environmental effects of hunter-gatherers, the agricultural revolution, and the
industrial revolution.
Hunter-gatherers:
Over hunting species leads to extinction (especially species like giant sloths, giant bison, mastodons, cave bears, saber-toothed cats)Agricultural Revolution:
Flora and Fauna became domesticated Habitats were destroyed because the grasslands forests and wetlands were replaced by farmland that results in erosion and floods and made the soil less fertileIndustrial revolution
Artificial substances replaced raw animals and plant products (plastics, pesticides) The rate of pollution increased.Final answer:
The hunter-gatherer lifestyle did not heavily impact the environment, whereas the Agricultural and Neolithic Revolutions led to changes in land use, social organization, and significant environmental manipulation. The Industrial Revolution further transformed human activity with mass production, causing notable increases in atmospheric CO2 levels.
Explanation:
Throughout history, the way humans have interacted with their environment has dramatically evolved. The hunter-gatherer societies had minimal impact on the environment as they fitted seamlessly into ecological food chains. However, the advent of the Agricultural Revolution around 3000 B.C.E. introduced permanent tools and farming tactics like crop rotation and the use of waste as fertilizer, paving the way for larger human settlements, trade, and increased environmental manipulation.
The Neolithic Revolution signified a pivotal shift from hunter-gatherer lifestyles to agriculture, leading to larger populations, specialization of labor, and sophisticated settlements such as Jericho and Çatalhöyük. This transition necessitated changes in land use, social organization, wealth accumulation, and even religious practices. However, not all societies embraced farming due to environmental unsuitability or perceived disadvantages.
The Industrial Revolution brought about significant changes in production, leading to widespread environmental impacts including an increase in global atmospheric carbon dioxide concentration. This remarkable era transformed human activity and initiated the mass manufacture of goods, which had global repercussions, shifting the world into a new ecological era.
what happens if the pressure in an angler fish habitat decreases
Lotions applied during winter season moisturize the skin very quickly. What could be the reason for this?
A.
The oils in the lotion enter the skin cells by means of phagocytosis.
B.
The oils in the lotion enter the skin cells with the help of carrier proteins.
C.
The oils in the lotion enter the skin cells by means of facilitated diffusion.
D.
The oils in the lotion enter the skin cells by means of simple diffusion.
Answer:
The correct answer is D the oils in the lotion enter the skin cells by the means of simple diffusion.
Explanation:
Lipid molecules that are rich in unsaturated fatty acids exist as oil in biochemical system.
As the oils are rich in fatty acids that means they are hydrophobic in nature.For being hydrophobic it will be very easy for the oils present in the lotion to enter the skin cells by means of simple diffusion.
Why is it necessary to fill a chamber with water and empty it in a cellular respiration lab? Is it because if not, the carbon dioxide levels change?
Answer:
Yes , it is necessary to fill a chamber with water and empty it in a cellular respiration lab
Explanation:
The chamber which is filled with water act as oxygen in the cellular reaction and gets emptied during the process due to production of carbon dioxide. The main ingredient for the cellular respiration is oxygen without it production of carbon dioxide is certainly not possible. So presence of water is an essential factor in cellular reaction. Through anaerobic respiration carbon dioxide can be produced but to a limited amount not like with oxygen.
It is necessary to fill a chamber with water and empty it in a cellular respiration lab.
Yes. If not, the carbon dioxide levels will change.
Explanation:
Cellular respiration is the energy deriving process in most eukaryotes. Oxygen is the main input of this process. In the process glucose reacts with oxygen and get converted to ATP which is the energy source of the cell.
Other products released in the process are carbon dioxide and water. The chemical equation of cellular respiration is [tex]C_6 H_12 O_6+6O_2 \rightarrow 6CO_2+ 6H_2 O+ATP[/tex].
In a cellular respiration lab the chamber filled with water acts as the source of oxygen which is essential for cellular respiration.
Since carbon dioxide is the byproduct and oxygen continuously gets used up in the process, it is necessary to empty the chamber .If not the carbon dioxide levels change. When all the oxygen in the water gets used up will be no more production of carbon dioxide.
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Studying how drought affects the food supply in a region of the Alaskan tundra would be studying a question at the __________ Level of Ecological Organization.
ecosystem
biosphere
population
community
Answer:
it is population now give me my crown
Explanation:
Answer: The correct answer is ecosystem
Explanation: I did this on CK-12 it’s the right answer.
Which process is responsible for cracks in successive strata in the earth?
Faulting is the process by which this pressure forces the strata to continue their movement, sometimes, producing cracks in the involved strata. This Causes earthquakes and tremors, much like tectonic plate movement, in the event of an intense pressure release.
beets are red. what color is being reflected from the beets?
Answer:
Red because that's the color we see.
Answer:
The red color seen in beeturia is caused by the presence of unmetabolized betalain pigments.
Explanation:
The red color seen in beeturia is caused by the presence of unmetabolized betalain pigments such as betanin in beetroot passed through the body. The pigments are absorbed in the colon.