what is the primary original source of genetic variation in a population?
Answers
The primary original source of genetic variation in a population is mutation. Mutation is the process by which DNA is altered or changed, resulting in new variations in the genetic code. These changes can be beneficial, harmful, or neutral, and can lead to the creation of new alleles or the modification of existing ones.
Mutations can occur spontaneously or be induced by environmental factors such as radiation or chemical exposure. Over time, these mutations can accumulate in a population, leading to genetic diversity and the potential for adaptation and evolution. Therefore, mutation is considered to be the primary source of genetic variation in a population. Other sources of genetic variation in a population include genetic drift, gene flow, and natural selection. Genetic drift refers to the random fluctuations in allele frequencies that occur in small populations, which can result in the loss of genetic diversity.
Gene flow occurs when individuals migrate between populations, leading to the exchange of alleles and the potential for new genetic combinations. Natural selection acts on the variation present in a population, favoring individuals with traits that increase their survival or reproductive success. Together, these processes contribute to the complex patterns of genetic diversity observed in natural populations.
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The primary original source of genetic variation in a population is mutation. Mutations are random changes that occur in the DNA sequence of an organism's genome.
These changes can range from small-scale mutations, such as point mutations or insertions/deletions of genetic material, to larger-scale mutations, such as chromosomal rearrangements or gene duplications. Mutations can introduce new genetic variants and alleles into a population, thereby creating genetic diversity.
Mutations can occur spontaneously during DNA replication or as a result of environmental factors such as radiation, chemical exposure, or certain mutagenic agents. While most mutations are either neutral or detrimental to an organism's fitness, some mutations can be advantageous in certain environments, providing individuals with a selective advantage and increasing their likelihood of survival and reproductive success.
Genetic variation generated by mutations serves as the raw material for natural selection to act upon. Through the process of natural selection, advantageous genetic variations are more likely to be passed on to future generations, leading to evolutionary changes in a population over time. Thus, mutations are the primary source of genetic variation that fuels the processes of adaptation and evolution.
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Related Questions
SOMEONE PLS HELP WITH THESE TWO QUESTIONS
1)Chad’s family just moved into a new home. The sun went down as Chad was moving boxes into the house, so he had to turn on a light to see. Which statements are true about the power Chad used? Choose the two statements that apply.
A. The power he used to move the boxes can be found by determining the rate at which work was done on the boxes.
B. The power Chad used to move the boxes is the force he used times the distance he moved them.
C. The power of the light Chad turned on is the amount of energy changed from electricity to light.
D. The power of the light Chad turned on is the amount of energy transferred per time.
2)Raul dug a hole in his yard to repair a water pipe. It took him 2 seconds to apply a force of 50 Newtons to push the shovel 0.25 m into the ground. How much power was used?
A. 0.01 watts
B. 6.25 J/s
C. 25.00 N•m•s
D. 100.00 watts
Answers
Answer:
1.) A and D
2.) B
Explanation:
The power he used to move the boxes can be found by determining the rate at which work was done on the boxes. The power of light Chad turned on is the amount of energy transferred per time. So the correct options are A and D. In 2nd, the power used was 6.25 J/s. So the correct option is B.
What is power?
The watt, denoted by the letter W, is the common unit used to measure power. James Watt, a Scottish businessman and inventor, is honoured with the unit's name. The watt is certainly a term you frequently encounter in daily life. Electrical devices like light bulbs and stereos commonly advertise their power output in watts. One watt is equivalent to one joule of work performed each second by definition.
Horsepower is another power unit that is still extensively used. This was first used to describe the ability of a regular horse to spin a capstan in the 17th century and is often represented by the sign hp. Since then, a metric horsepower has been defined as the force needed to raise a 75 kg mass a metre in one second, where 75 kg is the mass's weight in kilogrammes.
Therefore, for 1) the correct option is A and D and for 2) the correct option is B.
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What does the invasive species “Kudzu” eat? Explain in a short 2-3 sentences
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Kudzu as any other plant is an autotroph, that is to say, it produces its own food, in this case through photosynthesis, thanks to chlorophyll it captures light from the sun and along with CO₂produces the needed glucose to sustain energetic input in the cells. Another factor is the soil from which obtains nitrogen phosphorus and other minerals necessary to maintain cell function.
Metabolism is the sum of all reactions occurrin reactions can be described as catabolic or between these two terms. Explain kinetic energy and potential energy. What is chemical energy? Is it a type of potential energy? Describe the two laws of thermodynamics. How does energy flow through an ecosystem? What is entropy? If entropy is increasin Earth? What is the difference between an exergonic and endergonic reaction? ATP is our cells' energy molecule. What does ATP stand for? Why is ATP the standard energy molecule? ls ATP completely broken down when we molecule is used? When we use the molecule, ATP is converted to Give some examples of how a cell uses ATP. How does an enzyme lower the energy of activation in a reaction? An enzyme has a specific because of the specific shape of the active site on the enzyme. What four factors affect enzyme activity? How can an enzyme be denatured? What happens to an enzyme that has been denatured? Can it still work? Q in a cell (or body as a whole). These anabolic. Briefly explain the difference 9 in the universe, how do we explain the increase in complexity on use the energy? If not, what part of the
Answers
Metabolism: catabolic or anabolic reactions. ATP: energy molecule used by cells for various processes.
Digestion is the amount of all responses happening in a life form. These responses can be depicted as catabolic (separating complex atoms into more straightforward ones) or anabolic (building complex particles from easier ones).
Motor energy alludes to the energy of movement, while potential energy is put away energy that can possibly be changed over into different types of energy. Substance energy is a sort of potential energy put away in the obligations of particles. It is delivered or ingested during synthetic responses. Compound energy is a type of expected energy.
The two laws of thermodynamics are:
1. The Primary Law of Thermodynamics, otherwise called the Law of Preservation of Energy, expresses that energy can't be made or obliterated in a separated framework, however it tends to be changed over starting with one structure then onto the next.
2. The Second Law of Thermodynamics expresses that in any energy move or change, the all out entropy (jumble) of a disengaged framework generally increments. Entropy is a proportion of the irregularity or confusion of a framework.
Energy courses through an environment in a unidirectional way. Daylight is caught by plants during photosynthesis, changing over it into substance energy. This energy then moves through the established pecking order as life forms consume and are consumed by others.
Entropy is a proportion of the problem or irregularity in a framework. It will in general increment over the long run in a secluded framework except if energy is contribution to diminish it.
An exergonic response discharges energy, while an endergonic response requires energy contribution to continue. ATP (adenosine triphosphate) is our cells' energy particle.
It represents adenosine triphosphate. ATP is the standard energy particle since it can undoubtedly give and move energy to drive cell processes.
ATP isn't totally separated when it is utilized. It is hydrolyzed to ADP (adenosine diphosphate) and inorganic phosphate, delivering energy that can be utilized by the phone.
Cells use ATP for different cycles, like muscle compression, dynamic vehicle, DNA amalgamation, and protein combination. Catalysts bring down the enactment energy expected for a response, working with and accelerating synthetic responses in the phone.
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The more a muscle is stimulated (working), the smaller it will get.
O
true
О
false
Answers
Answer: true
Explanation: Sometimes, a subset of muscle fibers is activated, depending on how much force is needed. When the muscle is stimulated, calcium ions are released from its store inside the sarcoplasmic reticulum, into the sarcoplasm (muscle ). ... The SR is smaller and less elaborate, and stores less calcium ions.
Which of these igneous rocks cooled so quickly that crystals
did not form, creating a natural glassy look?
Answers
Were any of the parameters (for a urinalysis) measured after ingesting distilled water different than the test performed before ingesting the distilled water? If so, explain why these differences were observed.
Answers
Based on your question, I understand that you'd like to know if any parameters of a urinalysis change after ingesting distilled water as compared to before ingestion.
Yes, some of the parameters in a urinalysis may change after ingesting distilled water. These differences can be observed mainly in two aspects: urine volume and urine concentration. Let me explain why these changes occur.
1. Urine volume: After ingesting distilled water, the total volume of urine produced may increase. This is because the body recognizes the increased water intake and responds by producing more urine to maintain a proper fluid balance.
2. Urine concentration: As a result of increased water intake, the concentration of solutes in the urine may decrease. This is because the kidneys are working to excrete excess water, and in the process, they dilute the concentration of solutes such as sodium, potassium, and urea in the urine.
These differences in urine volume and concentration can be observed through a urinalysis test, which measures various parameters like specific gravity, electrolyte levels, and the presence of certain chemicals in the urine.
In summary, after ingesting distilled water, a urinalysis may show an increased urine volume and a decreased urine concentration due to the body's efforts to maintain fluid balance.
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Ecological footprint is the impact of a person or community on the environment, expressed as the amount of land required to sustain their use of natural resources. The three countries with the largest ecological footprints are the United States, China, and India. Use the diagram above to answer the following question. Population growth in which country would have the greatest impact on global resources usage? United States Mongolia Argentina India
Answers
The country with the highest population growth, India, would have the greatest impact on global resource usage.
Ecological footprint is the impact of a person or community on the environment, expressed as the amount of land required to sustain their use of natural resources. The United States, China, and India have the largest ecological footprints globally. A nation's population size is a critical factor in determining its ecological footprint. The ecological footprint is the amount of land required to sustain an individual, community, or population.
Population growth causes an increase in ecological footprint since more land is needed to support people's lives. India has the highest population growth rate, which is why its ecological footprint is enormous. India's ecological footprint has a significant impact on global resources usage since it is the second most populous country in the world after China. In conclusion, the country with the highest population growth, India, would have the greatest impact on global resource usage.
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Do the gradient levels and the sediment load increase or decrease as the
river ages?
Answers
As a river ages, the gradient levels typically decrease, while the sediment load may either increase or decrease depending on various factors.
The gradient of a river refers to the slope or steepness of its channel. Over time, as a river flows and erodes its surroundings, it tends to reach a state of equilibrium, where the slope becomes less steep. This is known as a decrease in gradient levels.
The sediment load of a river refers to the amount of sediment (such as sand, silt, and rocks) carried by the flowing water. It can vary based on factors such as the geology of the area, the climate, and the amount of erosion occurring in the river's watershed.
In some cases, as a river ages and continues to erode its surroundings, the sediment load may increase as more sediment is picked up and transported downstream. However, in other cases, the sediment load may decrease if the river reaches a point of balance where erosion and sedimentation are relatively equal.
Therefore, the change in sediment load as a river ages can vary depending on local conditions and the specific characteristics of the river.
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which descending tracts/pathways in the spinal cord adjust peripheral muscle tone to complement the reflexive movements of the head and neck?
Answers
Extrapyramidal tracts are descending tracts/pathways in the spinal cord adjust peripheral muscle tone to complement the reflexive movements of the head and neck.
Motor fibres are transported to the spinal cord by extrapyramidal pathways, which start in the brain stem. They are in charge of the instinctive and involuntary regulation of posture, muscular tone, balance, and modulation of motor plans.
The brainstem is the point of genesis for all extrapyramidal pathways, which do not go through the pyramids. The motor fibres that allow for unconsciously, reflexively, or responsively moving muscles to control balance, movement, posture, and tone are all carried by these tracts to the spinal cord.
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A mutation occurs in the coding region of a gene with the following sequence AAGTGC. The translated sequence is Lysine (AAG), Cysteine (TGC). Give an example of the following types of mutation using AAGTGC as your normal sequence. Provide the translated sequence caused by the mutation. (Hint: You will need a codon table to translate the sequence)
(a) Synonymous mutation
(b) Non-synonymous missense mutation
(c) Non-synonymous nonsense mutation
Answers
(a) Synonymous mutation: AAGTGC is the normal sequence coding for Lysine (AAG) and Cysteine (TGC). A synonymous mutation occurs when a gene changes its nucleotide sequence but the amino acid sequence remains unchanged. An example of this type of mutation using AAGTGC is AAGTGT. The translated sequence would still be Lysine (AAG) and Cysteine (TGT). This is because TGT is a codon for Cysteine, so the amino acid sequence remains unchanged.
(b) Non-synonymous missense mutation: AAGTGC is the normal sequence coding for Lysine (AAG) and Cysteine (TGC). A non-synonymous missense mutation occurs when a gene changes its nucleotide sequence and the amino acid sequence is also changed. An example of this type of mutation using AAGTGC is AAGTGA. The translated sequence would be Lysine (AAG) and Glutamic acid (TGA). This is because TGA is a codon for Glutamic acid, so the amino acid sequence is changed from Cysteine to Glutamic acid.
(c) Non-synonymous nonsense mutation: AAGTGC is the normal sequence coding for Lysine (AAG) and Cysteine (TGC). A non-synonymous nonsense mutation occurs when a gene changes its nucleotide sequence and the amino acid sequence is changed to a stop codon. An example of this type of mutation using AAGTGC is AAGTAA. The translated sequence would be Lysine (AAG) and Stop codon (TAA). This is because TAA is a codon for Stop codon, so the amino acid sequence is changed from Cysteine to Stop codon, which causes the protein to be truncated.
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Which of the following best describes chromosomes?
OA. Chromosomes are long strands of DNA that carry genetic information in the form of genes.
OB. Chromosomes are one possible form of the gene for a particular trait of an organism.
OC
Chromosomes are the cellular product formed when DNA sequences are transcribed and translated.
Answers
Chromosomes are long strands of DNA that carry genetic information in the form of genes.
_____________________and ______________________are primary lymphoid organs while the _____________________and _______________________are secondary lymphoid organs.
Answers
Answer:
Primary lymphoid organs: the bone marrow and the thymus
secondary lymphoid organs: adenoids tonsils spleen
What are two major plant adaptations that were most important in allowing plants to become independent of aquatic habitats?.
Answers
Two major adaptations that were most important in allowing plants to become independent of aquatic habitats are the vascular system and seeds.
In order for plants to survive on land, they need a proper vascular system for the transport of food and water. Also, if not water, then another source should be present for plants for fertilization and protecting their embryos.
The presence of the vascular system is an adaptation that allowed plants to survive in land habitats. The xylem vascular system is responsible for transporting water from the soil to all the other parts of the plant. The phloem vascular bundle is responsible for the transportation of food from the leaves to all other parts of the plant.
The development of seeds in plants allowed a secure method for dispersal as seeds protect the embryos of plants and are also transported through means such as animals, winds etc.
Although a part of your question is missing, you might be referring to this question:
What are two major plant adaptations that were most important in allowing plants to become independent of aquatic habitats?
a. photosynthesis and symbiotic relationship with fungi
b. vascular system and seeds
c. bilateral symmetry and becoming multicellular organisms
d. spore production and becoming single-celled organisms
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The two broad categories of fibrous connective tissue, based on the relative abundance of fibers, are ______ connective tissues.
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The two broad categories of fibrous connective tissue, based on the relative abundance of fibers, are dense and loose connective tissues.
Dense connective tissue is composed of densely packed collagen fibers that are arranged in parallel bundles. The fibers give the tissue great strength and resilience, making it ideal for supporting and protecting organs and other structures in the body. Loose connective tissue is less densely packed, with collagen fibers interwoven in a random pattern. This type of tissue is more flexible, allowing for movement and cushioning of organs. It also allows for the exchange of nutrients and waste, and provides structural support for organs.
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HELP !!WILL MARK BRAINLIEST !!! A star will remain stable and produce light and heat as long as which condition is true.
Answers
Answer: The inward force of gravity and the outward force of nuclear fusion are equal.
.What mucosa-associated lymphatic tissue (MALT) traps pathogens entering the nasal and oral cavities?
A.) Peyer's patches
B.) Tonsils
C.) Lymph nodes
D.) Appendix
Answers
B) Tonsils are part of the mucosa-associated lymphatic tissue (MALT) that traps pathogens entering the nasal and oral cavities.
Tonsils are a type of lymphoid tissue that are located in the back of the throat and are part of the body's immune system. They are part of the mucosa-associated lymphatic tissue (MALT) and play a role in protecting the body against pathogens that enter the respiratory or digestive tract through the mouth and nose. The tonsils contain lymphocytes and other immune cells that can help identify and destroy bacteria and viruses.
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Which type of interspecific interaction could best be described as a “win-win” interaction?
parasitism
commensalism
predation
competition
mutualism
Answers
Answer:The question describes a mutualistic relationship in which both the bee and the flower benefit. Mutualistic relationships can be described as win-win interactions between species.
Explanation:
Musculo que tiene las características tanto de musculo esquelético como de musculo liso. Se encuentra en el corazón y sus contracciones son involuntarias
ayuda por favor
Answers
Answer:
El músculo estriado cardiaco es una forma especializada de músculo estriado, conforma la pared del corazón, cuya contracción rítmica es involuntaria.
Explain how form and function are related in human cells, including examples. Use at least five sentences in your answer. The shape of a cellular structure is related to the function they have perform
Compare and contrast epithelial and muscle tissues. Use at least three sentences in your answer.
Answers
Explanation:
Form and function are intimately related in human cells. The shape and structure of cellular components are often specifically designed to carry out their respective functions effectively. For example, red blood cells are disc-shaped with a concave center, which increases their surface area for efficient oxygen and carbon dioxide exchange. Neurons have long, branching extensions called dendrites and axons, allowing them to transmit electrical signals over long distances.
Epithelial tissues are composed of closely packed cells that form protective barriers and linings in the body. They cover external surfaces (such as the skin) and line internal organs and cavities (such as the digestive tract). In contrast, muscle tissues consist of cells that are specialized for contraction and movement. There are three types of muscle tissues: skeletal muscle, responsible for voluntary movements; cardiac muscle, found in the heart; and smooth muscle, which controls involuntary movements in organs like the intestines.
Epithelial tissues primarily function in protection, absorption, and secretion. They have tightly packed cells with minimal extracellular matrix. In contrast, muscle tissues are specialized for contraction and movement. They contain long, elongated cells (muscle fibers) that can generate force. Skeletal muscle is striated and allows for voluntary movements, while cardiac and smooth muscles have different structures and functions specific to their respective roles in the body.
In summary, the relationship between form and function is evident in human cells. Cellular structures are designed with specific shapes and arrangements to perform their functions efficiently. Epithelial tissues provide protective barriers and linings, while muscle tissues enable contraction and movement. Understanding the relationship between form and function helps us appreciate the intricate design of cells and tissues in the human body.
What climate conditions occur during La Niña?
O stronger prevailing winds and more hurricane activity
O warmer Pacific waters and warmer winters
O more hurricane activity and warmer Pacific waters
warmer winters and stronger prevailing winds
Answers
Answer:
Stronger prevailing winds and more hurricane activity .
Answer:
A: stronger prevailing winds and more hurricane activity
Explanation:
Just took Edge 2021 test
Please help!! PLEASE!
Answers
Answer:
1-Sparta, 2-Sparta, 3-Sparta, 4-both, 5-both, 6-Athens, 7-Athens, 8-Athens, 9-Sparta, 10-Athens, 11-Athens, 12- Sparta, 13-Athens, 14-Sparta, 15-Sparta
Explanation:
Answer:
I copied my previous answer to this because I think they are the same questions. BTW how many times did u post the same question??!
1- Athens
2- Spartans
3- Spartans
4- I think it is both, don't get me wrong
5- I think it is Spartans
6- Athens
7- Athens
8- Athens
9- Spartans
10- Athens
11- Athens
12- Spartans
13- Athens
14- Spartans
15- Spartans
There you go. Hope this helps :D
what is geological uplifting
Answers
Answer:
ereee
Explanation:
weqwe
the body plate that covers the internal gills of fishes is known as the
Answers
The map shows the native range of the bullfrog and the areas where the bullfrog has been introduced. Are there any natural barriers between the east side of the map and the west side? If humans had not introduced the frog, do you think the frog would have naturally expanded its range?
Answers
Bullfrog populations in the east and west differ significantly, and the Rocky Mountains are to blame for this. If humans hadn't introduced bullfrogs, there wouldn't be many of them on the west side.
Bullfrogs in North America must live in water, therefore they are typically found close to a body of water, such as a lake, pond, river, or bog. Preferably, shallow, warm, and quiet waters.
Bullfrogs are currently widespread throughout the central and eastern United States, as well as in many places of the western United States where they have been innovated, including Hawaii. Bullfrogs are native to the central and eastern United States.
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name two species of staphylococcus that are part of our normal microbiota
Answers
Answer:
Staphylococcus aureus, and coagulase-negative staphylococci
Explanation:
Two species of staphylococcus that are part of our normal microbiota are Staphylococcus aureus, and coagulase-negative staphylococci.
all of the following are associated with hypersaline seeps except: question 40 options: chemosynthesis. hydrogen sulfide. microbial mats. very high salinity. very high temperature.
Answers
The term that is not associated with hypersaline seeps is very high temperature. Hypersaline seeps are characterized by high salinity levels, which can support the growth of microbial mats and chemosynthetic organisms that utilize hydrogen sulfide as an energy source.
However, they are not typically associated with very high temperatures. All of the following are associated with hypersaline seeps except very high temperature. Hypersaline seeps typically involve chemosynthesis, hydrogen sulfide, microbial mats, and very high salinity.
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Crustaceans larvae is developed into an adult by..
Answers
According to the research, the correct answer is metamorphosis. Crustaceans larvae are developed into an adult by metamorphosis process.
What is Crustaceans larvae?
It is when the Crustacean is just a fraction of what the lobster or shrimp will be and is characterized by presenting only three pairs of appendages that function as swimming appendages.
In this sense, they are decapods but like other groups of arthropods, during their life cycle they change their appearance and require a process of metamorphosis through various molts or ecdysis processes that give rise to other forms or larvae to reach the adult state.
Therefore, we can conclude that according to the research, the majority of Crustaceans larvae present indirect development, whereby larvae emerge from the eggs developed into an adult by metamorphosis process.
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how do organisms in an ecosystem depend on detritivores
Answers
Answer:
A detritivore is a heterotrophic organism, which obtains its nutrition by feeding on detritus. Detritus is the organic matter made up of dead plant and animal material. Detritivores may also obtain nutrition by coprophagy, which is a feeding strategy involving the consumption of feces.
Which factor can decrease the rate of a chemical reaction?
low activation energy
high pressure
low temperature
high concentration of enzyme
Answers
Done !!!!
plzz make mcqs for cadet level iksc
1. biology
2. chemistry
3. physics
Answers
Answer:
IGCSE**
u can just go through the book