The feature of the genetic code that explains why both AUC and AUA codons in mRNA specify isoleucine is called "redundancy" or "degeneracy."
The feature of the genetic code that explains why both the AUC and AUA codons in mRNA specify isoleucine is called redundancy or degeneracy. The genetic code has 64 possible codons, but only 20 amino acids are used to make proteins. This means that multiple codons can code for the same amino acid, allowing for redundancy in the code. In the case of isoleucine, there are three codons that can specify it: AUC, AUU, and AUA. This redundancy in the genetic code helps to reduce the effects of mutations or errors in DNA replication, as a change in one nucleotide may not necessarily change the amino acid that is specified by the codon.
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lappe argues that proponents and opponents of biotechnology are distracted and not focus on the right issue. what is the right issue for her?
According to Lappe, the right issue that proponents and opponents of biotechnology should be focusing on is the larger, systemic issues surrounding our food system, such as equity, access, and sustainability.
Frances Moore Lappé, a prominent author and activist, argues that the debate surrounding biotechnology is distracting from the real issue, which is the concentration of corporate power in the food system. She believes that the biotechnology industry is using its power to shape the food system in a way that benefits corporate interests, rather than the health and well-being of consumers and the environment.
According to Lappé, the real issue is not whether biotechnology is inherently good or bad, but rather the way in which it is being used to concentrate power and control over the food system. She argues that the biotechnology industry is promoting a narrow set of solutions to complex problems, such as hunger and environmental degradation, while ignoring the social, economic, and political factors that contribute to these issues.
In Lappé's view, the solution is to promote a more democratic and decentralized food system, one that empowers people to make informed choices about the food they eat and the way it is produced. She believes that this can be achieved through policies that promote local food systems, support small-scale farmers, and increase transparency and accountability in the food industry. She argues that biotechnology is just one piece of the puzzle and that we need to address the root causes of the problems in our food system in order to create meaningful change.
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¿Cuáles son las preguntas que Darwin no pudo responder?
The questions that Darwin could not answer include the origin of life, the origin of sex, and the mechanism of inheritance.
Although Charles Darwin's theory of evolution by natural selection provided a comprehensive explanation for the diversity of life on earth, there were still several questions that he was unable to answer. One of the most significant questions was the origin of life itself, which remains a mystery to this day.
Additionally, Darwin was unable to explain the origin of sex, as asexual reproduction would seem to confer a greater advantage in terms of passing on one's genes. Finally, Darwin did not fully understand the mechanism of inheritance, which was not elucidated until the discovery of DNA in the 20th century. Despite these unanswered questions, Darwin's theory of evolution remains a foundational concept in modern biology.
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--The complete question is, "What were the questions that Darwin could not answer?"--
WAD: Neurobehavioral Studies- this study found the use of what modality to possibly be beneficial for WAD pts?
Neurobehavioral Studies- this study found the use of treating the acute and sub acute modality to possibly be beneficial for WAD pts
Whiplash Associated Disorders (WAD) tool, which was originally designed to assess disability in patients with mechanical neck pain, but is also validated for use with WAD patients.
Whiplash Associated Disorders (WAD) is a term used to describe a range of symptoms that can occur following a whiplash injury, such as neck pain, headache, and dizziness. The WAD tool is a questionnaire that assesses the impact of these symptoms on a patient's daily activities, such as work, social life, and leisure activities. The questionnaire consists of a series of items that ask about the severity and frequency of symptoms, as well as the impact on daily activities.
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the special pair in photosystem I is known as _____ because it absorbs _____ nm wavelengths the best
The special pair in photosystem I is known as P700 because it absorbs 700 nm wavelengths the best,
Photosystems can be of two types which are the photosystem I and photosystem II. Photosystems are basically considered as the functional units for the process of photosynthesis which get defined by some association patterns as well as , which perform the very essential function of the absorption as well as the transfer of the light energy, which basically causes the transfer of the electrons.
The photosystem I absorbs light of higher wavelength as compared to the photosystem II. The photosystem I has a special pair which is called P700 as it absorbs wavelengths which are about 700nm.
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Metabolic process impaired if rapid red fibers
If an individual has an increased proportion of fast-twitch (rapid) red fibers in their muscle tissue, their metabolic processes may be impaired.
Fast-twitch red fibers are specialized muscle fibers that are capable of generating large amounts of force and contracting rapidly, but they are also highly dependent on anaerobic (non-oxygen-dependent) metabolism for energy.
This means that they are less efficient at generating ATP (the cellular energy currency) and can quickly fatigue when compared to slow-twitch (slow) fibers, which rely more on aerobic metabolism. An imbalance in the distribution of muscle fiber types, such as an excess of fast-twitch fibers, can lead to metabolic and functional impairments.
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how is intensity related to power and area? how is power related to work? If asked to find the energy given the intensity, area, and time... how would these equations be arranged to do so
Intensity is related to power and area by the following equation Intensity = Power / Area.
This equation shows that the intensity of a wave (such as light or sound) is directly proportional to the power of the wave and inversely proportional to the area over which the wave is spread.
Power is related to work by the equation: Power = Work / Time, This equation shows that the power expended to do work is directly proportional to the amount of work done and inversely proportional to the time taken to do the work.
To find the energy given the intensity, area, and time, we can use the following equation: Energy = Intensity x Area x Time, This equation shows that the energy carried by a wave is directly proportional to the intensity of the wave, the area over which it is spread, and the time over which it travels.
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progression through the cell cycle requires a cyclin to bind to a cdk because a. the cyclins are the molecules with the enzymatic activity in the complex. b. the binding of a cyclin to cdk is required for cdk enzymatic activity. c. cyclin binding inhibits cdk activity until the appropriate time in the cell cycle. d. without cyclin binding, a cell-cycle checkpoint will be activated.
The binding of a cyclin to a cdk is required for cdk enzymatic activity, which is necessary for progression through the cell cycle. The correct answer is b.
Cyclins and cdks form a complex that regulates the various stages of the cell cycle. Without the binding of a cyclin, the cdk would not be activated and the cell cycle would not progress.
Additionally, there are various checkpoints throughout the cell cycle that ensure proper progression and prevent errors, but the absence of cyclin binding would not necessarily activate a checkpoint.
The formation of cyclin/CDKs controls the cell-cycle progression via phosphorylation of the target genes, such as tumor suppressor protein retinoblastoma (Rb).
The activation of cyclins/CDKs is induced by mitogenic signals and inhibited by the activation of cell-cycle checkpoints in response to DNA damage.The correct answer is b.
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why do their legs have a wider temp range than their core
The legs of animals often have a wider temperature range compared to their core body temperature due to adaptations such as counter-current heat exchange, regulation of blood flow, and differences in insulation.
Animals, especially those in colder environments, often have adaptations that allow their legs to have a wider temperature range compared to their core body temperature. .
Counter-current heat exchange: Many animals have blood vessels in their legs arranged in a counter-current heat exchange system, where warm arterial blood flowing to the legs passes close to colder venous blood returning from the extremities.
Peripheral vasoconstriction and dilation: Animals can regulate the blood flow to their extremities by constricting or dilating blood vessels. In colder conditions, blood vessels in the legs can constrict, reducing blood flow and heat loss to the environment.
Insulation: Some animals have adaptations such as fur, feathers, or blubber in their core body region to provide additional insulation and retain heat.
In summary, These adaptations allow animals to maintain a stable core body temperature while tolerating wider temperature variations in their extremities.
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Complete Question
why do their legs have a wider temp range than their core?
Describe the dispersal of zebra mussels by humans and the types of affects it can have on local communities.
Zebra mussels are an invasive species that have been spread to bodies of water all around the world by humans.
Usually, they are buried in the water or connected to other items as larvae or adults and transported in ships and boats. Once they get to a new area, they can disperse quickly, displacing local species and competing with them for resources like food and habitat.
The local food web, water chemistry, and aquatic habitats may all see significant changes as a result of their existence.
The health of nearby ecosystems as well as the recreational and economic uses of these bodies of water may be harmed by this.
Local communities are consequently frequently compelled to take action to safeguard their water environments against the zebra mussel's expansion.
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long stem which the hippocampus uses to communicate with other parts of the limbic system
The long stem that the hippocampus uses to communicate with other parts of the limbic system is called the fornix.
The fornix is a bundle of nerve fibers that plays a crucial role in the transmission of information within the limbic system, which is responsible for emotion, learning, and memory.
The hippocampus, a key structure in the limbic system, processes and consolidates new memories.
To communicate with other parts of the limbic system, the hippocampus sends signals via the fornix to structures such as the mammillary bodies and the anterior thalamic nuclei.
This connectivity allows the hippocampus to coordinate with other limbic regions to regulate emotional responses, memory storage, and retrieval.
In summary, the fornix serves as a vital communication pathway for the hippocampus, enabling it to interact with other areas of the limbic system and contribute to the overall functioning of emotions, learning, and memory processes.
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the brain consists of white and grey matter. what do each of these contain? which lies deeper?
Which amino acid residue is involved in the bond that joins the alpha and beta subunits of HGF? Alpha and Beta subunits are joined by a disulfide bond
Cysteine is the amino acid residue that plays a role in the bond that binds the HGF alpha and beta subunits together.
What is the legacy for Hprcc?The autosomal dominant inheritance pattern of HPRC means that one copy of the altered gene is enough to increase a person's risk of developing cancer. This implies that a parent with a quality change might pass along a duplicate of their typical quality or a duplicate of the quality with the transformation.
What exactly is autosomal inheritance?A genetic trait or condition can be passed down from parent to child through autosomal dominant inheritance. A single copy of a mutant (changed) gene from one parent may be the source of the genetic disorder. There is a 50% chance that a child will inherit the mutated gene from a parent with the mutation.
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What other forms of mange occur in llamas? Which one would arouse the most excitement in the U.S.? Why is it difficult to treat chorioptic mange in camelids?
A. The other forms of mange occur in llamas are sarcoptic mange and chorioptic mange.
B. Sarcoptic mange would arouse the most excitement in the U.S.
C. It is difficult to treat chorioptic mange in camelids because it penetrates with topical treatments.
A. Sarcoptic mange is caused by a different mite species than demodectic mange, and it is highly contagious among animals. Chorioptic mange, on the other hand, is caused by the same species of mite as in horses and cattle and affects the legs and lower body.
B. The form of mange that would arouse the most excitement in the U.S. is likely sarcoptic mange, as it is highly contagious and can quickly spread through herds of animals if not treated promptly.
C. Chorioptic mange is difficult to treat in camelids because the mites are typically found on the lower legs and feet, which are heavily keratinized and difficult to penetrate with topical treatments. Additionally, camelids tend to have more sensitive skin than other animals, which can limit the types of treatments that can be used without causing further irritation. As a result, treating chorioptic mange often requires a combination of topical and oral medications, and may take several weeks to fully resolve.
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What do we need to keep track of in redox reactions in carbohydrates?
In redox reactions in carbohydrates, it is important to keep track of the oxidation states of the carbons involved. This is because redox reactions involve the transfer of electrons between molecules, and the oxidation state reflects the number of electrons that an atom has gained or lost.
In carbohydrates, the carbon atoms can have varying oxidation states depending on their position in the molecule and the functional groups attached to them.
During redox reactions, certain carbons may be oxidized, losing electrons and increasing their oxidation state, while others may be reduced, gaining electrons and decreasing their oxidation state. It is important to keep track of these changes to accurately determine the overall redox reaction and the products that are formed.
Additionally, it is important to keep track of the presence of cofactors such as NAD+ and FAD, which act as electron carriers and facilitate the transfer of electrons during the redox reaction.
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How many antibodies do B lymphocytes produce?
Each B lymphocyte is capable of producing only one type of antibody, which is specific to a particular antigen, or foreign substance.
B lymphocytes, also known as B cells, are a type of white blood cell that is responsible for producing antibodies, which are proteins that help the body recognize and fight off foreign invaders such as bacteria, viruses, and other pathogens. Each B lymphocyte is capable of producing only one type of antibody, which is specific to a particular antigen, or foreign substance.
When a B lymphocyte encounters an antigen that matches its specific antibody, it becomes activated and begins to divide rapidly. As a result, a single B lymphocyte can give rise to many daughter cells, all of which produce identical copies of the original antibody. This process, known as clonal expansion, allows the immune system to rapidly produce large quantities of antibodies that can target and neutralize the invading pathogen.
While each B lymphocyte is capable of producing only one type of antibody, the human body has millions of different B cells, each of which is capable of producing a unique antibody. This diversity allows the immune system to recognize and respond to a wide variety of different pathogens and helps to ensure that the body can mount an effective immune response against any invading pathogen.
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according to the michaelis-menten equation, when does Km=[S]?
According to the Michaelis-Menten equation, Km=[S] when the reaction rate is half of the maximum rate (Vmax/2).
The Michaelis-Menten equation is used to describe the rate of an enzyme-catalyzed reaction as a function of the substrate concentration [S]. The Michaelis constant (Km) represents the substrate concentration at which the reaction rate is half of the maximum rate (Vmax/2).
When Km=[S], the denominator in the Michaelis-Menten equation becomes 2[S], resulting in V = (Vmax/2), or half of the maximum rate.
This relationship has important implications for enzyme kinetics and the behavior of enzyme-catalyzed reactions. When the substrate concentration is much lower than Km, the reaction rate is proportional to the substrate concentration, and the enzyme behaves as a first-order catalyst.
In contrast, when the substrate concentration is much higher than Km, the reaction rate approaches Vmax and is independent of changes in the substrate concentration.
Thus, the Michaelis constant provides a measure of the enzyme's affinity for its substrate, and plays a crucial role in determining the behavior of enzyme-catalyzed reactions.
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the interneuron in the spinal cord triggers which answer choice? an inhibitory stimulus that prevents contraction of the knee extensor muscles an inhibitory stimulus that prevents contraction of the knee flexor muscles a stimulatory stimulus that prevents contraction of the knee flexor muscles a stimulatory stimulus that prevents contraction of the knee extensor muscles
It is not possible to determine the exact response triggered by the interneuron in the spinal cord without additional information on the neural circuitry involved. The spinal cord contains both inhibitory and excitatory interneurons that can modulate the output of motor neurons and affect muscle contraction.
Depending on the specific connections and context of the neural circuit, the interneuron may trigger either an inhibitory stimulus that prevents contraction of a muscle group or a stimulatory stimulus that promotes contraction of a muscle group.
In addition to interneurons in the spinal cord, there are also reflex arcs involving sensory neurons and motor neurons. A sensory neuron is responsible for transmitting sensory information, such as pain or pressure, from the peripheral nervous system to the central nervous system.
A motor neuron, on the other hand, is responsible for transmitting signals from the central nervous system to the muscles or glands, causing them to react. In a reflex arc, the sensory neuron sends a signal to the spinal cord, where an interneuron can quickly relay the information to a motor neuron, causing an automatic response without the need for involvement from the brain.
Reflex arcs are important for rapid responses to potentially dangerous or painful stimuli.
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the pleural cavity has a negative pressure. what causes this? (pick all that apply) group of answer choices elastic recoil of the lung surface tension of alveolar fluid surface tension of fluid in pleural cavity the chest wall
The negative pressure in the pleural cavity is caused by the following factors: elastic recoil of the lung, surface tension of alveolar fluid, and surface tension of fluid in the pleural cavity. The chest wall also plays a role in maintaining the negative pressure.
1. Elastic recoil of the lung: The lung tissue has elastic properties that constantly pull the lung inward, away from the chest wall. This creates a negative pressure within the pleural cavity.
2. Surface tension of alveolar fluid: The fluid lining the alveoli creates surface tension, which further contributes to the inward pull on the lung tissue and increases the negative pressure in the pleural cavity.
3. Surface tension of fluid in the pleural cavity: The thin layer of fluid in the pleural cavity also exhibits surface tension, adding to the overall negative pressure.
Together, these factors establish and maintain the negative pressure within the pleural cavity.
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How does development of flat bone differ from other bones?
The flat bones of the helmet and the turtle shell are created in a distinctive manner by intramembranous ossification.
Bones are classed based on their form. Long bones, like the femur, are wider than they are long. Short bones, like the carpals, have roughly similar lengths, widths, and thicknesses. Flat bones are thin, but curved bones, such as the ribs, are common.
Mesenchymal cells generated from the neural crest proliferate & condense into compacted nodules during internal ossification in the skull. The fontanelles have connective tissue stem cell populations that differentiate into osteoblasts that produce calcium phosphate into a canal matrix.
They form a ring between the membranes and begin to spread. As they grow, they form a bone matrix. Long bones are bones with lengths longer than the width of them wide. They are made up of a long shaft and two hefty ends or extremities.
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Which parathyroid glands are more likely to be in the wrong position? where can you find them?
The parathyroid glands that are likely to be in the wrong position or ectopic position are known as inferior glands. The inferior parathyroid glands are present posterior to the inferior pole of the thyroid glands.
The inferior parathyroid glands associate functionally with the the thymus, and the thyroid gland. These parathyroid glands are also known as variably positioned parathyroid glands. These glands also attribute to the laryngeal nerve function, and the parathyroid gland relationship.
Hence, based on the given statements , it can be pointed out that the parathyroid glands likely to present in the ectopic or wrong position is inferior glands.
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The inner surface of the urethra, the tube through which urine exits the body, is lined with which type of epithelial cells?
The inner surface of the urethra, the tube through which urine exits the body, is lined with stratified squamous epithelial cells. These cells have multiple layers and are flat in shape, allowing them to withstand mechanical stresses and resist abrasion. The type of epithelial cells lining the urethra can vary depending on the location along the length of the tube. For example, the male urethra is long and is divided into three parts, each lined with different types of epithelial cells.
Julia is puzzled over a fill-in-the-blank question in her sociology test paper. To answer the question correctly, Julia has to use _____ memory.a) Sensoryb) Short-termc) Long-termd) Semantic
Julia has to use semantic memory. The correct option is (d).
Semantic memory is a type of long-term memory that involves our general knowledge and understanding of the world, including concepts, facts, and relationships between them. This type of memory is used when we need to retrieve information that we have previously learned, and it is often associated with academic and factual knowledge.
In Julia's case, she needs to use her semantic memory to retrieve the knowledge she has learned about sociology and apply it to answer the fill-in-the-blank question correctly. This requires her to access her stored knowledge about the subject matter, such as definitions, concepts, and theories.
Overall, semantic memory is an essential component of our cognitive abilities, and it allows us to understand and navigate the world around us by retrieving and using previously learned information.
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organize these in the order of excitation in the heart:purkinje fiberssinoatrial nodeatrioventricular nodebundle of his and its branches
The correct order of excitation in the heart is: 1. Sinoatrial (SA) node 2. Atrioventricular (AV) node 3. Bundle of His and its branches 4. Purkinje fibers
The SA node is located in the right atrium and initiates the electrical impulse that triggers the heart's contraction. The impulse then spreads across both atria, causing them to contract.
The AV node is located between the atria and ventricles, and delays the impulse briefly before transmitting it to the Bundle of His and its branches.
The Bundle of His is a collection of specialized fibers that rapidly transmit the impulse to the Purkinje fibers.
The Purkinje fibers are located in the walls of the ventricles, and rapidly distribute the electrical impulse, causing the ventricles to contract in a coordinated fashion.
This sequential activation of the heart's electrical system ensures that the heart contracts efficiently, allowing for optimal blood flow and oxygen delivery to the body's tissues.
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Which will have cells? (Select all that apply.) dog rock tree bacteria
Since rocks are made of minerals and are inorganic, non-living materials, they lack the features of living beings, including cells.
The dog, tree, and bacterium will all have cells, according to the options.Dogs are multicellular creatures that are part of the kingdom Animalia. The tissues, organs, and organ systems of dogs are made up of a variety of different cell types.
Trees are multicellular plants that are members of the kingdom Plantae. Their tissues and organs are made up of specialised plant cells called parenchyma, collenchyma, and sclerenchyma.
Bacteria are single-celled microorganisms that are members of the Monera kingdom and are composed of a single prokaryotic cell.
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Which will have cells dog rock tree bacteria?The options that have cells are:
Dog
Tree
Bacteria
how does the selectively permeable membrane separate molecules in dialysis? group of answer choices only polar molecules can pass through the membrane only water and no other molecules can pass through the membrane only molecules of a certain molecular structure can pass through the membrane only molecules of a certain size can pass through the membrane
The selectively permeable membrane in dialysis separates molecules based on their size.
Only molecules that are small enough to pass through the pores in the membrane can cross it. This is because the membrane has tiny pores that allow small molecules, such as water and small solutes, to pass through, while larger molecules, such as proteins and other macromolecules, are unable to cross the membrane.
In addition, the membrane can also be designed to allow only certain types of molecules to pass through based on their molecular structure or polarity.
Overall, the selectively permeable membrane in dialysis is designed to filter out unwanted substances from a solution, leaving behind the desired molecules and ions. This process is critical in medical applications such as kidney dialysis, where the membrane helps to remove waste products from the blood.
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There are several reasons why cloning
would be much better than organ donation:
Cloning has the potential to provide a renewable source of organs for transplantation.
Instead of relying on donations from deceased or living donors, cloned organs could be produced in large numbers and tailored to match the recipient's genetic makeup, reducing the risk of rejection. Cloned organs may also have a longer lifespan than donor organs, as they would be free of the wear and tear that comes with age.
On the other hand, cloning is still a controversial and experimental technology with many ethical and practical challenges. There are concerns about the safety and effectiveness of cloning, as well as the potential for abuse or exploitation. Additionally, the high cost and complexity of cloning technology make it unlikely to be a practical solution in the near future.
Organ donation, on the other hand, is a proven and widely used method of saving lives and improving health outcomes. It is a voluntary act of altruism that can make a significant difference in the lives of those in need. While there are limitations to the availability of donor organs, advances in medical technology and organ procurement methods have increased the supply of organs and improved the success rates of transplantation.
Ultimately, both cloning and organ donation have their own advantages and limitations. The decision to pursue one method over the other will depend on a range of factors, including the individual's medical needs, ethical considerations, and societal values.
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an organism such as a fish whose body temperature is nearly the same as the environment is referred to as:
The organism you are referring to is called a ectotherm or a cold-blooded animal. Examples include fish, reptiles, and amphibians. Their body temperature is regulated by the temperature of their surroundings, as they do not produce their own internal heat.
An organism, such as a fish, whose body temperature is nearly the same as the environment is referred to as a poikilotherm or ectotherm.
The ectotherms include the fishes, amphibians, reptiles, and invertebrates. The body temperature of an aquatic ectotherm is usually very close to the temperature of the surrounding water..
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define the following terms:stem cellspotencytotipotentpluripotentmultipotentwhich one of these categories does adult stem cells usually fall into?
Stem cells are undifferentiated cells that can self-renew and transform into specialized cells.
The capacity of stem cells to differentiate into a variety of cell types is referred to as their potency.
All types of cells, including extra-embryonic cells (like the placenta), can be transformed by totipotent cells.
All three germ layers can be derived from pluripotent cells, which can differentiate into the mesoderm, endoderm, and ectoderm
Multipotent cells can separate into various cell types inside a particular genealogy, like platelets or brain cells.
Due to their capacity to differentiate into a limited number of cell types within a specific tissue or organ, adult stem cells are typically regarded as multipotent. However, some adult stem cells may be pluripotent and have a greater capacity for differentiation.
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some common anoxygenic photosynthesizers include..?
Some common anoxygenic photosynthesizers include Green sulfur bacteria, Heliobacteria, Purple sulfur bacteria.
A category of bacteria known as anoxygenic photosynthesizers is able to carry out photosynthesis without releasing oxygen as a byproduct. Anoxygenic photosynthesizers use substances other than water as an electron donor, such as sulfur, hydrogen sulfide, or organic matter, in contrast to oxygenic photosynthesizers like plants and algae.
This kind of photosynthesis takes place in anaerobic environments like soil or specific kinds of aquatic habitats. Based on the type of pigment they use to capture light, anoxygenic photosynthetic bacteria are divided into two main groups: the green bacteria and the purple bacteria. The cycling of sulfur and carbon in particular environments is one ecological process where anoxygenic photosynthetic bacteria play a significant role.
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_____ involves fixation of oxygen by the RuBisCo enzyme, but produces no ATP or sugar
Photorespiration. involves fixation of oxygen by the RuBisCo enzyme, but produces no ATP or sugar
It is a process that occurs in the chloroplasts of plants, where RuBisCo, the primary enzyme responsible for fixing carbon dioxide during photosynthesis, mistakenly binds with oxygen instead of carbon dioxide. This leads to the production of a toxic compound that the plant must expend energy to convert back to a usable form. Unlike the main photosynthetic pathway, which generates ATP and sugar, photorespiration consumes ATP and reduces the efficiency of photosynthesis.
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