earlier, we described the lederbergs’ experiment, which demonstrated that mutations are not directed by the environment. but mutagens, which are environmental factors, can lead to mutations. what’s the difference?
Answers
The Lederbergs' experiment showed that mutations are not directed by the environment, while mutagens are environmental factors that can increase the rate of mutations.
The Lederbergs' experiment demonstrated that mutations occur spontaneously and randomly, independent of the environment. They observed mutations in bacteria even in the absence of any external influences. This means that mutations are not specifically directed by the environment.
However, mutagens are environmental factors that can increase the likelihood or frequency of mutations. They can interact with an organism's DNA and introduce changes, leading to mutations. Mutagens do not direct mutations to specific targets but instead increase the overall mutation rate, making mutations more likely to occur. So, while mutations are random events, mutagens can enhance their occurrence in an organism exposed to such environmental factors.
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Related Questions
Which statement correctly defines coevolution?A. two new species that differ from each other and their common ancestor in a particular traitB. two entirely unrelated species that end up with a similar trait as they adapt to similar conditionsC. two closely related species that evolve the same trait separately from each otherD. two entirely different species affecting each other’s evolution, as in predator-prey relationships
Answers
The statement that correctly defines coevolution is:
D: Two entirely different species affecting each other's evolution, as in predator-prey relationships.
Another example of coevolution is host-parasite relationship, which happens between totally separated species, but affects the way both of them will evolve.
Please help!
How could patenting a gene affect the progress of science?
How could patenting a gene affect society?
What is gene ownership? When is gene ownership ethical?
Answers
The act of patenting a gene could affect the progress of science as it will gives a lot of opportunities in regards to investment in research as well as in development.
How could patenting a gene affect society?The act of patenting a gene could affect society as it can lead to monopoly as well as bring about a secretive culture among a lot of research companies and thus brings about slows motion or outcome of medical results in the society.
What is gene ownership?The exclusive rights to a certain DNA sequence (a gene) are granted by a government to the person, group, or company that asserts to have discovered the gene first.
When is gene ownership ethical?The term gene ownership ethical when one is granted full right by the law to own it and one use it in the right or ethical way
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Which part of the chloroplast is responsible for absorbing light energy from the sun
Answers
1. Which types of companion cells are involved in apoplastic loading?
2. What is apoplastic loading?(Please describe differences in pathway, and in sugar molecules involved).
Answers
The companion cells that are involved in apoplastic loading are non-plasmodesmata cells.
Apoplastic loading is a process of phloem loading in which the sugar molecules are transported through the spaces in between the cells called the apoplast. There are two pathways of sugar transport: symplastic and apoplastic pathways. The differences between the pathways are:
Simplastic pathway: The sugar molecules are transported through the plasmodesmata channels in companion cells. It is slower and involves the energy expenditure in the form of ATP. Apoplastic pathway: The sugar molecules are transported through the apoplast, which is the space between the cells. This pathway is faster and does not involve the energy expenditure.Apoplastic loading is a process of phloem loading that involves the loading of sugar molecules into the phloem by passing through the apoplast. It is a passive process that does not involve the expenditure of energy. The sugar molecules involved in apoplastic loading are sucrose, fructose, and glucose. These molecules are transported through the apoplast by passing through the spaces between the cell walls and the plasma membrane. Once they reach the companion cells, they are actively transported into the phloem sieve tube elements, where they are transported to other parts of the plant.
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A normal polypeptide includes the following sequence of amino acids. (Note: Each amino acid is named by a three-letter abbreviation.)
val his leu thr pro glu glu).
After a mutation, the amino acid sequence becomes the following:
val his leu thr proval glu
O
Is the mutation that occurred more likely to have been a substitution or an insertion? Explain your answer.
Answers
Answer:
Based on the information provided, the mutation that occurred is more likely to have been an insertion rather than a substitution.
The original polypeptide has a sequence of six amino acids at the end that reads "glu glu," while the mutated polypeptide has an additional amino acid, "val," inserted between "pro" and "glu." This suggests that an extra amino acid was added to the sequence rather than one being substituted for another.
Substitutions involve the replacement of one amino acid with another, whereas insertions involve the addition of one or more amino acids to the sequence. In this case, the presence of an extra amino acid in the mutated polypeptide sequence indicates that an insertion mutation occurred.
Explanation:
Which of the following do all organisms have in common?
Answers
Answer:
What Do All Organisms Have In Common? All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Explanation:
At the end of this process in this cell, each DNA strand is...
Completely built new with a different code
Is one half the original DNA and one half new DNA with the same code as the original strand preserved
Is one half the original DNA and one half new DNA with a different code
Answers
Answer:
Is one half the original DNA and one half new DNA with the same code as the original strand preserved
Explanation:
I am assuming the process is DNA replication.
The process of DNA replication:
step 1- the DNA double helix unwinds using an enzyme called dna helicase. Proteins hold the strands apart from each other forming a Y shape called the replication fork.
step 2- At the replication fork, enzymes called DNA polymerase move along each of the DNA strands adding complementary bases to the nitrogen bases using base pairing rules.
step 3- DNA polymerases add nucleotides to a growing double helix until all the DNA is copied
result- 2 new DNA molecules, each made of one original strand and one copied strand
Which phrase describes the ability to mark which part of the brain controls what?
A. hemisphere surgery
B. brain mapping
C. brain tumor
Answers
Answer:
brain anatomy describes the ability of brain
What are the top 10 carbohydrates foods?
Answers
Carbohydrates are an essential nutrient that provide energy to the body. Here are the top 10 carbohydrate-rich foods:
1. Oats: Oats are a good source of complex carbohydrates, fiber, and protein. They are a popular breakfast food and can be consumed in the form of oatmeal or granola.
2. Sweet potatoes: Sweet potatoes are a nutritious root vegetable that is high in carbohydrates, fiber, and antioxidants. They can be baked, roasted, or mashed and used in a variety of dishes.
3. Bananas: Bananas are a popular fruit that is high in carbohydrates, fiber, and potassium. They are a convenient snack and can be added to smoothies or used in baked goods.
4. Brown rice: Brown rice is a whole grain that is rich in carbohydrates, fiber, and essential nutrients. It can be used in place of white rice in many dishes.
5. Quinoa: Quinoa is a gluten-free whole grain that is high in protein, fiber, and carbohydrates. It can be used in salads, stir-fries, or as a substitute for rice.
6. Whole wheat bread: Whole wheat bread is a good source of complex carbohydrates, fiber, and protein. It is a healthier alternative to white bread and can be used in sandwiches or as toast.
7.Lentils: Lentils are a legume that is high in carbohydrates, fiber, and protein. They can be used in soups, stews, or salads.
8.Apples: Apples are a fruit that is high in carbohydrates, fiber, and antioxidants. They are a convenient snack and can be used in baked goods.
9.Chickpeas: Chickpeas are a legume that is high in carbohydrates, fiber, and protein. They can be used in hummus, salads, or curries.
10.Greek yogurt: Greek yogurt is a good source of carbohydrates, protein, and calcium. It can be consumed on its own or used in smoothies or as a substitute for sour cream.
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what is an organism that usually has one cell and does not have organelles
Answers
Answer:
Prokaryotes
Explanation:
In biology, prokaryotes are single cellular and eukaryotes are multicellular although some are singular. Since prokaryotes are single cellular, they do not have organelles.
While the signals given by males can indicate their quality, could they also be detrimental to the males? How?
Answers
Surely, as male signals can act as signs of a guy's quality, they may also serve as a male's harm. as a fact that a male can find to female in a special ways. It didn't pick a widowbird if a female reject a male.
Widowbird's significance is unclear.Any of numerous species of birds as in family Viduidae, including whydahs and widow finches, are referred to as widow birds (plural: widow birds).
Why is a bird used as a Native American symbol?The belief that everything has innate goodness, strength, and wisdom is prevalent in Native American culture. An powerful symbol that denotes honor and a bond between the bearer, the Creator, or the bird from whom the feather originated is the feather.
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explain the difference of observation and interview
pls patulong po
Answers
Which of the following statements is true about the difference between paraphrasing and summarizing a text?
A paraphrase and a summary both restate the author's words in your own way, but a summary is longer.
A paraphrase is a breaking down of a text to its essential ideas; a summary contains the original thoughts of the author.
A paraphrase is shorter than the original text; a summary is the same length as the original text.
A paraphrase restates the author's words; a summary expresses the central idea of a text.
Answers
Answer: A paraphrase and a summary both restate the author's words in your own way, but a summary is longer.
Explanation:
The answer is D
Phrase: Restates the authors words and is about the same length as the original text.
Summary: Expresses the central idea of a text. It's also shorter than the original text.
you are on a committee that is planning whether or not to build a dam on a nearby river to produce hydroelectric power. describe some of the advantages and disadvantages you should consider before deciding to build the dam.
Answers
Dams preserve water, generate power, cause mass migration, and are expensive. Dams regulate water supply for domestic, industrial, and electric uses.
What are the advantages and disadvantages of dams?A dam is a structure that stops or slows the flow of water on the surface or in the ground.
Advantages of building a dam are:
Water flow is controlled and used to meet household, agricultural, and industrial demands.The reservoir that was formed behind the dam can be utilized for a variety of purposes, including irrigation, water sports, and even other forms of recreational pursuits.The production of energy by dams does not result in any pollution because there is no release of greenhouse gases during this process.Dams are utilized in conjunction with the hydroelectric plant in order to produce electricity.Disadvantages are:
The construction of dams takes many years, which results in a decrease in the quality of life for individuals who live in areas that are now undergoing construction.The process of constructing dams is one that is both time-consuming and incredibly expensive.The building of massive dams causes significant damage to the surface of the earth, which in turn has negative effects on geological processes.People are leaving in large numbers because they don't want to live in the area where the dam is going to be built.Learn more about dams, here:
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Raw materials, such as grain or lumber, as well as assemblies or parts are referred to as A) production goods. B) components. C) accessories. D) support products. E) raw assemblies.
Answers
The correct answer is B) components. Raw materials like grain and lumber, as well as assemblies and parts, are referred to as components.
These components are essential in the production process as they form the building blocks of the final product. For example, in the construction industry, lumber is a crucial component used to build houses, furniture, and other structures. Similarly, in the food industry, grains are a key component used to make flour, which is then used to bake bread and other baked goods. Components are typically processed or transformed in some way during the production process to create the finished product. In contrast, support products and accessories are items that are used to support the production process or enhance the functionality of the final product.
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In birds ,males are homogametic sex(XX),females are heterogametic (XY)
Light Sussex have mostly white plumage(feathers)and Rhode Island fowls have mostly red
The character white feathered (R) is dominant to the character red (r)
2. 1 Explain why on mating Rhode Island cockerels with white Sussex hens,all male offspring have white plumage and all females red
Answers
When mating the white feathered trait is dominate while the red feathered is resesive so both parents would have to have red feathers for there offspring to have red feathers.
Dominant refers to the transmission of qualities that are normally carried vertically from parent to kid, where both the parent and the child are impacted by the trait or disorder linked to that gene. The most prevalent form is autosomal dominant, in which the affected person carries both the pathogenic and benign alleles of the linked gene, which is located on one of the 22 non-sex chromosomes. One harmful allele is enough to provide the characteristic in this inheritance pattern. The 50% likelihood of passing on the trait to kids is caused by an affected person having just one of two copies of the pathogenic gene.
Recessive, as it relates to genetics, describes the connection between an observed trait and the two inherited forms of a gene associated with that trait. Each gene has two alleles that an individual receives from each parent. When a trait is recessive, both of the (recessive) alleles of the gene that causes it must be present for the trait to manifest. When there is only one copy of an allele, it does not create any traits at all. In contrast, a dominant trait can only be expressed if one of the two alleles is present.
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Cellular respiration occurs in the muscle cells in a horse's thigh. Glucose is broken down producing carbon dioxide and water. What is the result of this cellular activity for the horse?
Answers
The result of cellular respiration in the muscle cells of a horse's thigh is the production of ATP (adenosine triphosphate) that can be used for energy.
During cellular respiration, glucose (C₆H₁₂O₆) is oxidized and broken down into carbon dioxide (CO₂), water (H₂O), and energy in the form of ATP. In the presence of oxygen, this process is known as aerobic respiration, which is the primary means of producing ATP in eukaryotic cells.
The carbon dioxide produced in this process is carried to the lungs where it is exhaled, while the water produced can be used to help maintain the body's hydration.
The ATP produced is then used by the horse's muscle cells to carry out various functions such as movement, maintenance of body temperature, and other metabolic processes. Therefore, cellular respiration plays a vital role in providing the horse with the energy it needs to carry out its daily activities.
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Review the water cycle diagram below. What effect would removing the precipitation stage have on this environment?
A. There would be little snow and ice accumulation on the mountains.
B. There would be more evapotranspiration in the atmosphere.
C. There would be less water in the nearby oceans or bodies of water.
D. There would be increased surface runoff and groundwater discharge.
Answers
Answer:
the answer is letter D. hope this helps ^v^
*7 EXTRA POINTS PLS ANSWER*
A person pushes the same box with the same amount of force on 3 different surfaces. Which surface exerts the least friction on the box?
*WRITE AS A CER*
Answers
Answer:
Read explanation
Explanation:
Surface C exerts the least amount of friction on the box. Evidence that proofs this claim is that the length of time it took the box to stop is greatest compared to surfaces A and B. The box and the amount of force added is the same for each surface test. It would take the box less time to come to a stop the more friction there is upon the surface. Surface A having the quickest stop time meaning it has the most friction and C having the most time showing that it has the least amount of friction. In conclusion, surface C exterts the least amount of friction on the box.
DNA is copied during the S Phase of Interphase. Why do cells copy the DNA?
Answers
Answer:
During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. Then, at a critical point during interphase (called the S phase), the cell duplicates its chromosomes and ensures its systems are ready for cell division.
Explanation:
What is life please explain
Answers
Answer:
the existence of an individual human being like you and me and all of us life can also add up animals
What do we call the master control
genes?
A. manipulating genes
B. hox genes
C. omega genes
Answers
Answer:
Hometic genes
Explanation:
BEcause it is
All living organisms, including animals, plants, fungi, bacteria, and protists, must perform certain processes in order to survive. For
example, all living organisms must be able to obtain energy so they can use that energy to perform their life functions. In what part
of a living organism do these life functions occur?
Answers
Answer:
the cell im assuming. wait for another answer tho because I could be wrong
Answer: D. cells
Explanation: Green plants and some bacteria and protists obtain energy by absorbing light energy from the Sun to make sugar, a process known as photosynthesis. Animals, fungi, and other bacteria and protists obtain energy by consuming plants or other organisms. Then, once the energy is obtained, the energy is released through a process known as cellular respiration.
These life functions (e.g., waste breakdown and removal, growth and division, transport, respiration) occur in the cells of organisms, and these functions are similar in different organisms.
Zappos says goodbye to bosses - The Washington Post
Reflect on the changes to organizational structure
taking place at Zappos. What concepts are illustrated in this
article? Has it been a successful i
Answers
The changes taking place at Zappos illustrates numerous concepts related to organizational structure. The Holacracy system being adopted by the company removes the traditional line of command; instead tasks are delegated by employees to “circles” which are then serviced by members of those circles.
It focuses on efficiency of operations, as decisions are made in a decentralized fashion. Furthermore, the organization encourages employees to engage in learning and development to reach their potential, which is complemented by the company’s employee-first mentality.
It is difficult to ascertain whether these changes have been successful in so far as it is too early to ascertain the long-term effects. While the initial reports from the media focus on the positive aspects such as improved communication, job autonomy and growth, it remains to be seen if the company will continue to succeed or fall flat.
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Ashfaq is asked to explain the difference between a hypothesis, theory, and scientific law, which are terms used when discussing experiments, research, and scientific methodology. He knows that each term has a distinct meaning, and the terms are not interchangeable. Match the descriptive phrases to the correct term. may still be useful even when evidence does not support it added to Scientific Law Theory do not become lawswell-tested explanation for a range of phenomenaideally should be tested by an experiment in which only one variable is changed Hypothesis highly reliable scientific explanation of events in the natural world that unifies many repeated observationsconcise, specific descriptions of how some aspects of the natural world are expected to behave in a certain situation Scientific Law tentative scientific explanation that can be tested by further observation or by experimentationmay still be useful even when evidence does not support it
Answers
Answer:
Hypothesis
- ideally should be tested by an experiment in which only one variable is changed
- may still be useful even when evidence does not support it
- tentative scientific explanation that can be tested by further observation or by experiment
Scientific Law
- concise, specific descriptions of how some aspects of the natural world are expected to behave in a certain situation
- well-tested explanation for a range of phenomena
Theory
- highly reliable scientific explanation of events in the natural world that unifies many repeated observations
Explanation:
A hypothesis is an assumption that intends to explain a phenomenon, while a scientific hypothesis is tested by using the scientific method. The development of a testable hypothesis is the first step during the scientific method. Moreover, a scientific theory is a more coherent and stronger explanation of the natural world, which has been confirmed by experimental and/or observational procedures. Finally, a scientific law is a solid statement funded on repeated observational/experimental methods. A scientific law can be used not only for understanding but also for predicting different phenomena from the real world.
____ is a rapidly growing area of computer and biological science research in which computers and graphics software are used to produce highly accurate two- and three-dimensional images of the human body.
Answers
The field of computer and biological science study known as "Medical Imaging" uses computers and graphics software to create extremely accurate two- and three-dimensional images of the human body.
The term that completes the given sentence is "Medical Imaging."
Medical imaging is a rapidly growing field of research that involves the use of computer and graphics software to create highly accurate images of the human body. These images can be used to diagnose diseases, plan surgical procedures, and monitor the progress of treatment. Medical imaging includes techniques such as X-ray, computed tomography (CT), magnetic resonance imaging (MRI), and ultrasound. The advancements in medical imaging have revolutionized the field of medicine and have significantly improved patient care.
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on which of these issues is public opinion less likely to affect policymaking?
Answers
Public opinion is less likely to affect fiscal policy making.
There are a number of variables that affect the formulation of a country's fiscal policies, the most important being domestic demand and economic growth.
Public opinion is therefore not a relevant factor that affects the formulation of these policies, it affects more social and environmental policies, for example.
For a better understanding of fiscal policy, we must understand the concept of taxation.
Taxation is a financial obligation on individuals and organizations, whose main objective is to improve the economy and public services so that there is a fairer and more equal society.
Some examples of taxes:
Income taxpayroll taxsales taxTherefore, public opinion is more likely to affect the formulation of social and environmental policies than fiscal policies. Because it is capable of instituting new ideas and social awareness that can directly affect legislation.
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describe or draw where each of the 6 junctions would be found on an epithelial cell
Answers
Epithelial cells are polarized, meaning they have distinct apical and basolateral domains. There are six types of junctions that can be found in epithelial cells:
1. Tight junctions (also known as occluding junctions): These junctions are located at the apical end of the lateral membrane between adjacent epithelial cells.
Tight junctions form a barrier that prevents the movement of molecules between the cells and are critical for maintaining tissue integrity.
2. Adherens junctions: These junctions are found just below the tight junctions, at the apical end of the lateral membrane.
Adherens junctions anchor the actin cytoskeleton of one cell to that of an adjacent cell, providing structural stability to the tissue.
3. Desmosomes (also known as macula adherens): These junctions are located along the lateral membrane between adjacent cells, below the adherens junctions.
Desmosomes provide strong adhesion between cells and are important for tissue strength.
4. Gap junctions (also known as nexus): These junctions are found throughout the lateral membrane of epithelial cells.
Gap junctions allow small molecules and ions to pass directly between cells, enabling communication and coordination between cells.
5. Hemidesmosomes: These junctions are located at the basal end of the lateral membrane, where the cell attaches to the underlying basement membrane.
Hemidesmosomes anchor the intermediate filaments of the cell to the basement membrane, providing structural stability to the tissue.
6. Focal adhesions: These junctions are located at the basal end of the cell, where the cell attaches to the extracellular matrix.
Focal adhesions anchor the actin cytoskeleton of the cell to the extracellular matrix, providing structural stability and allowing the cell to migrate and interact with its environment.
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Individuals joining a population is an example of emigration / immigration
Answers
Answer:
immigration
Explanation:
a plastic cube is released in water will it sink or come to the surface of water
Answers
Answer:
The plastic cube if released in water does not sink and rather floats on the surface. This called the phenomenon of buoyancy. Plastic is water repellent object and it has high rates of buoyancy, when compared to other objects. As plastic is lighter than the water it tends to float on the surface.Answer:
it floats
Explanation: it has the density lesser than water so i dosen't sink