The most likely causes of genetic variation are random mating, genetic mutation and genetic drift.
The changes which occur in the genetic sequence of the DNA of an individual are known as genetic variations. They play a very important role in the bringing about evolution and increasing the survival rate of organisms.
The most likely causes of genetic variation are random mating, genetic mutation and genetic drift. Genetic drift is a shift in the allelic frequency of a population which occurs due to a random chance. Random mating is the mating between two individuals which is not dictated by any social or genetic preference and genetic mutations are the change in the sequence of the DNA which might occur due to exposure to UV rays, chemicals or some errors in replication.
--The given question is incomplete, the complete question is
"What are the most likely causes of genetic variation?"--
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Give three ways the human body would change if all cells in the human body were the same.
Answer:
There are many different systems involved in when we exercise, the three main ones are the Respiratory system which is involved in breathing the circulatory system which is about circulation of blood around the body and finally the muscular system and finally the Muscular system which is about how we move.
Explanation:
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Explanation:
I think they are
1-Bone deep: humans’ bones are in fact getting lighter and more frail. Owing to the sedentary nature of modern life, our bones have decreased in density and strength, most likely due a reduction in physical activity.
2-Gene change :Our genes are in a perpetual state of change, from one generation to the next. One major example of this is the rise in genes allowing for lactose tolerance. This upsurge is most likely due to the fact the majority of humans today drink milk all their lives. Historically, the enzyme that allows us to digest dairy turned off once we hit adulthood — when we were traditionally weaned off our mothers' breast milk.
3-body temperature.
The reading passage claimed, “trees are essential for all life in the stream.” Choose all the benefits that trees provide to streams.
1. Trees provide essential nutrients from dead leaves
2. Trees cause sediment to erode from the land and wash into streams
3. Trees provide shade to help keep cool water temperatures in the stream.
4. Trees decrease dissolved oxygen levels in the water
5. Trees filter stormwater run off which helps keep harmful pollutants out of the stream.
6. Trees provide habitat to wildlife.
Answer:1,3,5,6
Explanation:
The benefits that trees provide to streams are Trees provide essential nutrients from dead leaves, Trees provide shade to help keep cool water temperatures in the stream, Trees filter stormwater run off which helps keep harmful pollutants out of the stream and Trees provide habitat to wildlife.
How important is the tree to life on the planet?It is the trees that increase the humidity of the air, prevent erosion along the rivers, carry out photosynthesis resulting in the production of essential oxygen for living beings, provide shade and manage to reduce the temperature, reduce air pollution, serve as a shelter for species animals, contributing to respiration.
Trees have numerous health benefits. They absorb carbon dioxide (CO2) and release oxygen, improving air quality and humidity, and can even absorb noise and noise in the city.
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explain the stages of respiration in 3 steps (you may include more). You must use the following vocabulary words in your written explanations and underline them: oxygen, carbon dioxide, raw material, products, glucose, diffuse. make sure to define and state oxygen's role in the process and explain carbon dioxide and why it's a by-product. in addition, you must talk about fermentation and how it related to cellular respiration
The stages of respiration in 3 steps include the following below:
GlycolysisThe citric acid (TCA) or the Krebs cycleThe electron transport chain.What is Respiration?This is referred to as a metabolic process in which the living cells of an organism obtains energy in the form of ATP by taking in oxygen and liberating carbon dioxide.
The lungs is referred to as the central organ for respiration in humans and it involves the process in which oxygen is diffused into the lungs and releasing carbon dioxide as the by-product as result of it being breathed out of the body.
Fermentation takes place under anaerobic conditions which means with no or insufficient amount of oxygen being present and it does not fully oxidize glucose instead, small, reduced organic molecules are produced as waste.
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Which genotype belongs in space B?
The probability that the offspring will be homozygous dominant for this trait is 0%, option A is correct.
The Punnett square shows the possible combinations of alleles from the parents. The parent that is heterozygous (Pp) can produce two types of gametes (eggs or sperm), one carrying the dominant allele (P) and one carrying the recessive allele (p). The parent that is homozygous recessive (pp) can only produce gametes carrying the recessive allele (p).
The offspring resulting from this cross will all be heterozygous (Pp) since each parent can only contribute one allele for this trait. Therefore, 0% of the offspring have this characteristic and are homozygous dominant (PP), option A is correct.
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The complete question is:
A parent that is heterozygous for a trait is crossed with a parent that is homozygous recessive for the same trait, as shown in the Punnett square.
What is the probability that the offspring will be homozygous dominant for this trait?
A) 0%
B) 25%
C) 50%
D) 75%
What are 3 examples of common mutations?
The most common example of mutations are: Color blindness, Cystic fibrosis, Down syndrome.
Mutations are the change in the normal genetic sequence of the DNA that results in varied gene expression. Mutations can be at a single nucleotide or they can be over large strand of DNA, called point mutations and frameshift mutations respectively.
Down syndrome is the disease caused due to the presence of an extra copy of chromosome number 21, also called trisomy of chromosome 21. The disease cause some physical and developmental problems in the child. The symptoms include flattened face, small head, poor muscle tone, etc.
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The removal of trees and vegetation from an area.
A. erosion
B. deforestation
C. desertification
D. urbanization
What is the summary of Mendel's principles?
Gregor Mendel discovered the basic laws of heredity through the study of peas. He concluded that genes come in pairs and are inherited as separate entities, one from each parent. Mendel traced the segregation of parental genes and their appearance in offspring as dominant or recessive traits.
Mendel's four postulates and laws of heredity are: (1) the principle of pair factor, (2) the principle of dominance, (3) the law of germline segregation or purity (Mendel's first law of inheritance) and (4) the law of independent selection (Mendel's second law of inheritance).
Mendel generalized the results of his pea experiment into his three principles that explain the genetic basis of diploid organisms. they are: the principle of segregation, the principle of dominance, and the principle of independent assortment.
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How would an early Persian windmill compare an early European windmill?
A. Persian windmill blades were vertical,like,propellers,white Europeans one were horizontal,like egg beaters.
B. Persian windmill blades were horizontal,like egg beaters,while Europeans one were vertical.
C. Persian windmills were made of discarded sails,while Europeans windmills were made of wood.
D. Persian windmills were made of stone,while Europeans windmills were made of wood.
Answer:
A is the correct answer
Explanation:
Persian windmill blades were vertical, like propellers, while European ones were horizontal, like egg-beaters. Explanation: ... The very first windmills featured with long vertical shafts with blades designed like rectangles who lived in ninth-century Persia. Six to twelve sails were produced of those windmills.
In sentence 3 (reproduced below), the writer wants to ensure that the connotation of the underlined word is appropriate to the context of the sentence. Adolescents have unique sleep patterns, and with an early school start, many are doggedly tired, leading to serious health and safety risks. Which of the following versions of the underlined word would best accomplish this goal?.
A. resolutely
B. relentlessly
C. chronically
D. steadily
Option C, The word "chronically" is the best option in this context as it conveys the idea that the tiredness faced by adolescents is a long-term and persistent problem. The word "chronically" implies that the tiredness is ongoing and consistent, which is a suitable description for the scenario described in the sentence.
The use of the word "chronically" in this context is appropriate as it emphasizes the fact that the tiredness faced by adolescents is not a temporary or occasional issue, but a long-term, persistent and ongoing problem.
This helps to convey the idea that the sleep pattern problems faced by adolescents due to an early school start are not a minor inconvenience, but a serious issue with potential health and safety risks.
For example, it can lead to poor academic performance, mood swings, lack of attention, an increase in risk-taking behavior, and even accidents. Therefore, the use of "chronically" in this sentence effectively highlights the gravity of the situation and the importance of addressing the problem.
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The genetic code is the set of instructions that
translates genetic material into proteins. This code
defines how sequences of three nucleotides specify
which amino acid will be added next during protein
synthesis. Each sequence of three nucleotides is called
A. a protein
B. a codon
C. a Mutagen
D. a DNA molecule
Answer:
DNA molecule
Explanation:
Each sequence of three nucleotides is called a codon. Therefore, the correct answer is option B.
Codons are named by the request for their bases. The three stop codons in mRNA are UAA, UAG, and UGA, where U represents uracil, A for adenine, and G for guanine. Stop codons signal the end of protein synthesis. They can be found in DNA or mRNA.
They are three-nucleotide sequences that encode a particular amino acid. During the translation process, the tRNA (transfer RNA) molecules contain anticodons that aid in the transfer of amino acids to the mRNA.
A codon is a sequence of three nucleotides in DNA or RNA, also known as a trinucleotide. It is a unit of genomic information that encodes a specific amino acid or signals the end of protein synthesis (stop signals).
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Can we run out of renewable resources? Explain.
Answer:
No
Explanation:
Some resources will practically never run out. These are known as renewable resources. Renewable resources also produce clean energy, meaning less pollution and greenhouse gas emissions, which contribute to climate change.
Examples are Sun, Wind, and Water. We will always have sunlight and wind, right? So no, renewable resources CANNOT run out, hence the 'renewable' part. They come from sources that are not depleted when used. Others, like biomass, come from sources that can be replenished.
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Claim 1: The sediment that formed the Great Plains came from the rock of the Rocky Mountains. Claim 2: The magma that formed the Rocky Mountains came from the rock of the Great Plains. Which claim is wrong Give evidence to refute/disprove the other claim
Claim 1: The debris that shaped the Great Plains originated from the igneous material of the Rocky Mountains. (correct)
Claim 2: The magma that produced the Rocky Mountains originated from the Great Plains' rocks. (incorrect)
Great Plains vs Rocky MountainsThe Great Plains were formed by sediment from the Rocky Mountains being transported and deposited by rivers and other geological processes. The sedimentary rock that makes up the Great Plains includes materials such as sand, silt, and clay that were worn down from the uplifted Rocky Mountains and carried eastward by streams and rivers.
The Rocky Mountains were formed by tectonic activity that caused the Earth's crust to uplift and create the mountain range. The mountains are primarily composed of igneous and metamorphic rock that formed deep within the Earth's crust, rather than from the sedimentary rock of the Great Plains.
There is no evidence that supports claim 2, the magma that formed the Rocky Mountains did not come from the rock of the Great Plains. The magma that formed the Rocky Mountains came from the Earth's mantle, which is beneath the crust and is composed of mostly solid rock. The Great Plains being sedimentary rock, formed from erosion and weathering of pre-existing rock.
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A. Many dinosaurs were present in upper layers of rock strata, but not in lower layers.
B. In younger layers of rock, there would be few to no fossils of dinosaurs indicating many died out.
C. Fossils for dinosaurs in older layers were not present, but in younger layers, there were many.
D. In older layers of strata, the dinosaur fossils found were larger and less of them than in younger layers.
Answer:
A. Many dinosaurs were present in upper layers of rock strata, but not in lower layers.
Explanation:
In my opinion, this is the best possible answer.
The lac Operon is considered an inducible operon. Explain what this means making reference to and comparing the trip operon
The lac operon is an inducible operon, meaning that it is expressed only when needed. This is in contrast to a repressible operon, such as the trp operon, which is turned off in response to a stimulus.
The lac operon is activated when lactose, its inducer, is present in the environment. This activates the lac repressor, which in turn binds to the DNA, blocking the transcription of the genes. When the inducer is absent, the repressor is not activated, so the genes are expressed. In contrast, the trp operon is activated when the repressor is absent.
When the repressor is present, the trp operon is not expressed, and when the repressor is absent, the trp operon is expressed. Therefore, the lac operon is activated when its inducer is present, while the trp operon is activated when its repressor is absent.
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2. Which statement is incorrect about natural selection? A. A single organism can adapt to a cold environment by growing longer hair B. Over time organisms with longer hair will survive better in cold environments C. Humans are not involved in the natural selection process D. The offspring of each generation will likely be more adapted to the environment
Which of the following is an example of a transformation of chemical energy into electrical energy?
•An oil lighting up a room
•A car battery making headlights shine
•Sunlight providing power to a solar calculator
•A blowtorch welding two pieces of metal together.
Answer:
Pretty sure it's the 2nd or 3rd one
Answer:
a car battery making headlight shine
9. Why did the Irish potato famine occur?
O A. The farmers planted a variety of potatoes that were infected by a potato blight.
O B. The farmers didn't plant enough potatoes.
O C. The farmers all planted the same potato variety, which was susceptible to a potato blight.
O D. Potatoes don't have enough nutrients to be a staple crop.
Which statement best explains the passage's connection to life in the Soviet Union under Joseph Stalin: Snowball's interaction with the farmers parallels the way in which spies undermined Stalin's power.
Boxer's puzzlement shows that he does not believe that Snowball is a traitor, which represents people's loyalty to Stalin.
Snowball's bravery during the Battle of the Cowshed earns him an award, which reflects the fighting that occurred.
Squealer's false claim that he has documents to prove that Snowball is a traitor reflects lies used to control people.
Squealer's false claim that he has documents to prove that Snowball is a traitor reflects lies used to control people.
The statement that explains the connection of passage to life under Joseph Stalin in the Soviet Union is Squealer's false claim that he has documents to prove that Snowball is a traitor reflects lies used to control people.
Thus, the correct answer is D.
Who wrote Animal Farm?Аnimаl Fаrm wаs sаtiricаl novel being written by аn аuthor nаmed George Orwell. It wаs published in the yeаr 1945 in the country of Englаnd. It wаs а story relаting to the аnimаls in the fаrmlаnds where rebel wаs аgаinst their fаrmers аnd wаnted thаt аll the аnimаls giving equаl treаtment.
Аccording to the excerpt, the fаlse clаim given by Squeаler thаt he hаs the records which proven the existence of Snowbаll. Snowbаll is а betrаyаl person which reflected his behаvior of being lied to control the people аround him. This explаins the connection to the life of Joseph Stаlin in the country of Soviet Union аs perceived in the pаssаge tаken from the novel nаmed 'Аnimаl Fаrm'.
Your question is incomplete, but most probably your full passage was
"Comrades!" cried Squealer, making little nervous skips, "a most terrible thing has been discovered. Snowball has sold himself to Frederick of Pinchfield Farm, who is even now plotting to attack us and take our farm away from us! Snowball is to act as his guide when the attack begins. But there is worse than that. We had thought that Snowball's rebellion was caused simply by his vanity and ambition. But we were wrong, comrades. Do you know what the real reason was? Snowball was in league with Jones from the very start! He was Jones's secret agent all the time. It has all been proved by documents which he left behind him and which we have only just discovered. To my mind this explains a great deal, comrades. Did we not see for ourselves how he attempted—fortunately without success—to get us defeated and destroyed at the Battle of the Cowshed?"
The animals were stupefied. This was a wickedness far outdoing Snowball's destruction of the windmill. But it was some minutes before they could fully take it in. They all remembered or thought they remembered, how they had seen Snowball charging ahead of them at the Battle of the Cowshed, how he had rallied and encouraged them at every turn, and how he had not paused for an instant even when the pellets from Jones's gun had wounded his back. At first, it was a little difficult to see how this fitted in with his being on Jones's side. Even Boxer, who seldom asked questions, was puzzled. He lay down, tucked his forehoofs beneath him, shut his eyes, and with a hard effort managed to formulate his thoughts.
"I do not believe that," he said. "Snowball fought bravely at the Battle of the Cowshed. I saw him myself. Did we not give him 'Animal Hero, First Class,' immediately afterwards?"
"That was our mistake, comrade. For we know now—it is all written down in the secret documents that we have found—that in reality, he was trying to lure us to our doom."
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5. Describe the metabolic pathways in the monarch butterfly that take advantage of milkweed nectar to convert it into an energy currency.
A) Include details about the three phases of cellular respiration as they relate to sugar metabolism.
B) Where (or how) would sucrose enter the pathways?
Milkweed nectar is rich in a sugar, which is called sucrose. This sugar is a disaccharide, made of glucose and fructose. Sugar is broken down into glucose and fructose in the body, using an enzyme called invertase.
The three phases of cellular respiration are as:
Glycolysis is the process by which glucose is converted into energy. In glycolysis, two ATP molecules are made per glucose molecule. Two NADH molecules are also made. Aerobic organisms, such as monarch butterflies, can further process sugars. In the mitochondria, one CO₂ molecule is removed from the sugar, and one NADH is produced.The Kreb cycle is a series of eight enzymatic reactions that produce energy in the form of ATP. In the Kreb cycle, acetyl-CoA is completely oxidized to produce carbon dioxide. This process is aided by the production of NADH, FADH₂, and a molecule of GTP. Oxaloacetate is regenerated to continue the cycle.Oxidative phosphorylation is the process that generates a proton gradient across the inner mitochondrial membrane. This gradient is used by the V ETC complex to generate energy. The V ETC complex is located in the inner mitochondrial membrane, and as protons flow back and forth through the complex, it catalyzes the phosphorylation of ADP to produce ATP.Learn more about cellular respiration https://brainly.com/question/14158795
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Your friend tells you that they are faster than you, and challenges you to a race. If you accept, what measurements would you take to ensure this is a scientifically accurate? Explain your reasoning using vocabulary and your understandings from class today.
The measurements required to ensure this is scientifically accurate is to determine the velocity (e.g. meter by seconds).
What is science?Science can be defined as a body of knowledge that is obtained by using the scientific method.
All measurements during experimentation and/or observational procedures are part of the scientific method.
In conclusion, the measurements required to ensure this is scientifically accurate is to determine the velocity (e.g. meter by seconds).
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When a large percentage of the population have detached homes with yards in highly urban areas, the presence of sprawl is nearly inevitable. True False
False, One of the global difficulties confronting spatial development planning in recent years has been urban sprawl, defined as low-density, uncontrolled, limitless, and intermittent physical expansion into suburban areas.
Controlling two major elements, "population growth" and "per capita land consumption," is central to most of the work on urban sprawl. This study is to propose a comprehensive framework for dealing with this phenomenon emphasizing the case study of Shiraz Metropolitan Area (SMA) in Iran through identifying the drivers stimulating these two factors.
Spatial analytics, mathematical and statistical approaches such as Holder analysis, path analysis, and other statistical analyses were used in the analyses.
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explain the different types of roots
Plants have three types of root systems: 1.) taproot, with a main taproot that is larger and grows faster than the branch roots; 2.) fibrous, with all roots about the same size; 3.) adventitious, roots that form on any plant part other than the roots. ! :]
PLZ HELP 7TH GRADE SCIENCE
Answer:
A-Above the Arrow to indicate that the energy drives the reactions of photosynthesis.
Explanation:
The photosynthesis equation is as follows: 6CO2 + 6H20 +(energy) → C6H12O6 + 6O2
The answer is a because sunlight is needed to start the process of photosynthesis
in the image below which letters represent facilitated diffusion?
Answer:
A, B, C
Explanation:
One is a channel, one is a carrier, the other is simple
What general information do we need to research further to investigate the origin of life on Earth?
The fossil record is the information we need to research to investigate the origin of life on Earth.
How do we know the origin of life on Earth?The earliest evidence of life on Earth comes from fossils that are discovered in Western Australia which is about 3. 5 billion years ago. These fossils are the structures called stromatolites which are formed by the growth of a layer of single-celled microbes such as cyanobacteria.
The major source to know the history of life on earth is fossil records. Fossils are the remains of organisms that are present centuries ago. They form when an organism dies and is burry in dirt and is solidified by minerals.
So we can conclude that fossils are the information that shows the life of the earth.
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Which isotope has the longest half-life?
Answer: Bismuth-209
Explanation:
Answer:
Bismuth-209 (209Bi) is the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay (alpha decay). It has 83 protons and a magic number of 126 neutrons, and an atomic mass of 208.9803987 amu (atomic mass units). Primordial bismuth consists entirely of this isotope.
Explanation:
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Screenshot 1. The graph below represents changes in two different fish populations over time.
Which of the following most likely caused the change in the fish population after Year 3?
A. A change in habitat occurred so the orange fish could no longer blend in with the habitat.
B. The food source for all the fish decreased.
C .A change in habitat occurred so the dark green fish could no longer blend in with the habitat.
D. Climate change affected the habitat killing off the bright orange fish.
Screenshot 2. Use the chart below to identify the term that best describes the energy role for each organism. Which of the following correctly describes the energy roles of the organisms in the table?
A. 1 – Herbivore, 2 – Scavenger, 3 – Decomposer, 4 – Carnivore, 5 – Omnivore
B. 1 – Carnivore, 2 – Decomposer, 3 – Scavenger, 4 – Omnivore, 5 - Herbivore
C. 1 – Decomposer, 2 – Scavenger, 3 – Omnivore, 4 – Herbivore, 5 – Carnivore
D. 1 - Carnivore, 2 – Decomposer, 3 – Scavenger, 4 – Herbivore, 5 - Omnivore
Answer:
screnshoot 1 - C
screenshoot2-C
Why is blood clotting important? it helps to heal cuts
Answer: Inflammation
Once the wound is closed with a clot, the blood vessels can open a bit to allow fresh nutrients and oxygen into the wound for healing. Blood-borne oxygen is essential for healing. The right balance of oxygen is also important — too much or too little and the wound won't heal correctly.Explanation:
Answer:
yes
Explanation:
beacause it helps to stop the flow of unwanted blood from our body as ay wound occured at first the dirty or infected blood through wound get flowed and after that vitamin k clot the blood to prevent blood loss.
I neeed help I need a answer plsss help me out it’s due in 30mins
Answer:
number 3: bb
number 4:the evidence is shown in the pedigree chart since the square is colored in all the way, which means it is being affected in this situation
Explanation:
3 is bb because blindness is a recessive trait
__________ is a slow, idioventricular rhythm with wide QRS complexes that are representative of escape beats that originate from a lower focus in the ventricles. Asystole
Answer:
Ventricular tachycardia is a slow, idioventricular rhythm with wide QRS complexes that are representative of escape beats that originate from a lower focus in the ventricles. Asystole