a victim of murder is found to have scrapings containing skin cells under several of her fingernails. genetic analysis confirms that the
Answers
All STR alleles from the sample DNA and the DNA from suspect B match, therefore, suspect B is excluded by the results based on the exclusion principle, option A is correct.
The statement indicates that all the STR alleles from the crime scene DNA and suspect B's DNA match. This suggests a strong similarity between the two samples, indicating a potential connection. Therefore, based on the exclusion principle, suspect B can be excluded as the source of the DNA found under the victim's fingernails.
However, further analysis and examination of other evidence would be necessary to fully confirm the suspect's involvement or exclusion. It's important to consider additional factors, such as alibis, witness statements, and any other available evidence to draw a comprehensive conclusion, option A is correct.
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The complete question is:
Review Part: A victim murder is found to have scrapings containing skin cells under several of her fingernails. Genetic analysis confirms that the DNA isolated from these cells came from the same individual and does not match the DNA of the victim. The results shown below are for six CODIS STR markers from the crime scene DNA (from under the victim's fingemails and presumed to be the murderer's), and from three suspects (A, B, and C) who have been detained for questioning about the murder.
Do the STR results exclude any of the three suspects? Crime scene A B с
A. All STR alleles from the sample DNA and the DNA from suspect B match, therefore, suspect B is excluded by the results based on the exclusion principle.
B.The sample DNA and the DNA from suspects A and B have multiple STR alleles that do not match, therefore, suspects A and B are excluded by the results based on the statistical principle.
C.The sample DNA and the DNA from suspect C have the maximal number of STR alleles that do not match, therefore, suspect is excluded by the results based on the statistical principle.
D.The sample DNA and the DNA from suspects A and C have multiple STR alleles that do not match, therefore, suspects A and Care excluded by the results based on the exclusion principle.
Related Questions
Which groups in a country that is abundant in high skilled labor will gain from offshoring?
Answers
Offshoring will benefit consumers, low skilled workers, and high skilled workers.
An rise in offshoring will boost the relative pay for skilled labor in both the home and offshored countries since both will experience a shift in demand from lower to higher skilled workers. The home country will move resources from lower to highly skilled domestic workers. A concern that predates globalization is multinational corporations offshore or outsourcing their operations to underdeveloped nations. It provides proof that, generally speaking, when businesses begin hiring highly trained individuals abroad, they also expand the number of these workers working domestically.
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Why did scientists once think that DNA was too
simple to contain the genetic information of liv-
ing things? Explain why their reason was not
correct.
Answers
Compared to proteins, DNA was made up of only 4 bases. Due to its simplicity, scientists thought DNA was too simple to contain genetic information.
Why the reasoning behind DNA's simplicity was incorrect?Deoxyribonucleic acid also known as DNA is the genetic material of organisms. It is made up of 4 nucleotide bases, Adenine, Guanine, Thymine, and Cytosine.
Proteins are made up of 20 different amino acids. Amino acids are the building blocks of proteins and the variety of arrangement gives rise to different functions of the protein.
As protein offered more varieties when compared to DNA, scientists initially thought it was too simple to carry genetic information.
The reasoning was wrong as it was later found out that DNA, not proteins conferred heritable traits. These traits were passed down through generations successively. DNA also had the ability to replicate and showed the property of transcription and translation.
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define the lifecycle of silkworm .
Answers
Studies of vacuoles reveal that they are *
1 point
A) sites for the attachment of spindle fibers
B) sites of cellular respiration
C) reservoirs for water and dissolved minerals
D) information centers for all cellular activities
Answers
Matching. _____ is evolution within a _______ , while _______ is the _____ of one type of organism to another type of organism.
word bank:
organism
species
change
Preservation
macroevolution
herd
Microevolution
Answers
Answer:
__Microevolution___ is evolution within a ___species____ , while __macroevolution_____ is the _change____ of one type of organism to another type of organism.
Explanation:
Hope it helps:)
Answer:
Microevolution is evolution within a species, while macroevolution is the change of one type of organism to another type of organism.
What is the characteristic of phospholipids that allows them to form double-layered membranes spontaneously?
Answers
The characteristic of phospholipids that allows them to form double-layered membranes spontaneously is due to hydrophobic nature provided by the fatty acids and hydrophilic nature provided by the phosphate heads.
the phospholipids present in the cell membrane consist of glycerol backbone which is esterified to fatty acids, a phosphate group and a hydrophilic residue.
Whenever the phosopholipids comes in contact of aquatic environment the the phosphate group that is hydrophilic will come into contact with the water molecules while the hydrophobic part which consist of fatty acids come towards each other.
Hence they align in two layers with hydrophilic phosphate pointing outside and hydrophobic fatty tail pointing inside.
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PLEASE HELP QUICK!!!! GIVING BRAINIEST!!!!!!
Answers
Answer: saturated, monounsaturated and polyunsaturated
Explanation:
Where do microtubules of the spindle fibers originate during mitosis in animal cells?.
Answers
Microtubules of the spindle fibers originate during mitosis in animal cells from the centrioles of the cell.
The centrioles of the cell are where the microtubules for the spindle in animal cells begin. Tubulin proteins, which give centrioles their cylindrical shape, are the building blocks for these tiny organelles. These proteins aid in the production of brand-new microtubules that will assist in dividing the cell's genetic material.
When it comes to the mitotic phases, centrioles are crucial. During prophase, they initially go to the cell's opposing poles. Once finished, the centrioles will develop into microtubules that will connect to the sister chromatid centromeres and arrange them on the cell equator during metaphase. After that, during anaphase, the centrioles separate the chromatids, bringing each copy to the opposing edges of the dividing cell.
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what is the measurement of the osmotic pressure gradient between two fluid compartments?
Answers
The measurement of the osmotic pressure gradient between two fluid compartments is determined by the difference between their respective solute concentrations.
What is osmotic pressure?
Osmotic pressure is a term used to describe the amount of pressure that must be applied to a solution to avoid water from moving through a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.
The pressure exerted by a solution on a semipermeable membrane as a result of the difference in solute concentrations between the two sides of the membrane is referred to as osmotic pressure.
What is a concentration gradient?
A concentration gradient is a measure of the difference in concentration of a solute between two separate regions. The rate at which the concentration of a solute changes as a result of the solute's movement is determined by the concentration gradient. The greater the difference in solute concentration between the two regions, the greater the concentration gradient.
What is a solute?
A solute is a substance that dissolves in a solvent, creating a solution. A solution is a homogeneous mixture of two or more components. In a solution, the solute is the component that is present in the smallest amount. The solvent is the component that is present in the largest amount.
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Can y’all pls help I’m stuck on my homework
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Other organisms in the area will be affected negatively i.e. might die in the long run because of lack of producers.
How do organisms depend on one another?Living organisms depend on one another in their natural environment. Organisms such as green plants are capable of synthesizing their own food, hence, making them the producers in an ecosystem.
Other organisms like animals rely on plants for the transfer of energy to begin. According to this question, a drought has killed a lot of plants (producers) in an ecosystem.
This means that other organisms reliant on the producers will be negatively affected i.e. die.
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due to the curve of wilson, the roots of the maxillary molars incline towards
Answers
The roots of the maxillary molars incline towards the buccal (cheek) surface of the maxilla due to the Wilson curve.
This means that instead of being straight up and down, the roots of the maxillary molars are angled slightly towards the outside of the dental arch.
Wilson's curve is a natural curvature of the occlusal plane (the plane of the teeth when they are in contact), which allows for more efficient chewing and grinding of food.
The Wilson curve distributes biting and chewing forces evenly across the dental arch, reducing the risk of tooth roots wear and damage over time.
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An instrument is gradually lowered beneath the surface of the ocean to measure the temperature and salinity of the water. The graphs below show the change in temperature at each depth in kilometers below the surface.
What is the most valid conclusion regarding ocean depth temperature, based on the data?
The temperature and salinity increase with increasing depth.
The salinity increases as you get deeper into the ocean.
The bottom of the ocean is frozen and salinity levels are low.
The ocean temperature never rises above 10°C and salinity remains constant.
Answers
The conclusion from the data is that the salinity increases as you get deeper into the ocean.
What is salinity?Salinity means the level of salt in water. The salinity of water tends to increase as the depth of water increases. This means that the water becomes saltier as it gets deeper. Similarly, the temperature decreases with increasing depth.
Hence, the conclusion from the data is that the salinity increases as you get deeper into the ocean.
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7. From the arteries, blood flows into tiny, narrow vessels called _________________________________________.
Answers
Answer:
Arterioles
Explanation:
Arterioles later connect with smaller blood vessels called capillaries.I Hope This Helps!
-Aslina
given the rate at which human activity is increasing co2 levels, why can we not depend on the natural co2 cycle to prevent global warming?
Answers
We cannot depend solely on the natural CO2 cycle to prevent global warming because human activity is increasing CO2 levels at a rate that surpasses the natural capacity of the cycle to restore balance.
The natural CO2 cycle involves processes such as photosynthesis, respiration, and oceanic absorption that regulate the levels of CO2 in the atmosphere. However, human activities, particularly the burning of fossil fuels and deforestation, release vast amounts of CO2 into the atmosphere.
The rate at which CO2 emissions from human activities are occurring is much higher than the natural processes can handle. As a result, the excess CO2 accumulates in the atmosphere, trapping heat and contributing to global warming.
Relying on the natural CO2 cycle alone cannot effectively counterbalance the rapid increase in CO2 caused by human activities, necessitating the need for mitigation efforts to reduce emissions and actively address global warming.
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in what month would there be peak phytoplankton biomass in the southernmost part of the southern ocean (a polar ocean)?
Answers
December to February are the month would there be peak phytoplankton biomass in the southernmost part of the southern ocean (a polar ocean).
During this time, there is 24 hours of sunlight, which provides the necessary light for photosynthesis to occur in phytoplankton. Additionally, the seasonal melting of sea ice provides nutrients for the growth of phytoplankton, leading to the peak in biomass during this time.
Phytoplankton are microscopic, free-floating photosynthetic organisms that form the basis of the aquatic food chain. They are found in both marine and freshwater environments, and they play a critical role in the global carbon cycle by producing approximately half of the oxygen in the Earth's atmosphere through photosynthesis.
Phytoplankton are diverse and can be classified into different groups based on their pigmentation and cell structure. Some common groups include diatoms, dinoflagellates, and cyanobacteria. They are generally small in size, ranging from a few microns to a few millimeters in diameter.
Phytoplankton are primary producers, meaning that they convert energy from the sun into organic matter through photosynthesis. They use carbon dioxide, water, and nutrients such as nitrogen and phosphorus to create sugars, lipids, and other organic molecules. These organic molecules are then consumed by other organisms in the food chain, such as zooplankton, which are in turn eaten by larger predators.
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QUESTIONS:
1. The image below shows a small bean sprout. What does this sprout need to grow into a healthy plant?
A Fertilizer only
B. Water only
C. Light only
D Light and water
Answers
Answer:
D) Light and Water
Explanation:
Using energy from light, plants chemically combine carbon dioxide and water to create glucose and oxygen. This process is called photosynthesis. Plants also absorb oxygen gas from the air. Like animals, plants need oxygen to respire.
Describe the cell structure of a typical animal cell. Give the functions of each part of the cell structure.
Answers
A typical animal cell consists of cell membrane, a well developed nucleus, and cell organelles.
What is a cell?A cell is a basic fundamental structural and functional unit of the body.
A typical animal cell consists of:
Cell membrane: it is required to protect the cell from incoming foreign substances and also prevent the unwanted movement of materials from inside to outside of the cell.Cytoplasm: it is the fluid part of the cell that contain several cell organelles like endoplasmic reticulum, Golgi bodies, ribosome, lysosomes, etc.Nucleus: it is the brain of the cell that controls each and every activity of the cell. It contains genetic material in the form of chromatin material.Thus, this is a typical animal cell structure.
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Which of the following pollutants are most likely the result of a living organism?
Answers
Answer:
FULL QUESTION:
Which of the following pollutants are most likely the result of a living organism?
I. Mold
II. Pollen
III. Radon
Answer:
Mold and pollen are results of living organisms.
I and II only.
Although radon occurs naturally (radon gas is a result of uranium being broken down in the rocks and soil below our feet, stated in the lesson), the reason radon is not in this category is because it is not directly a result of living organisms, only of non-living elements of nature - soil and rock.
Population numbers for species were also recorded and graphed for each treatment (control and experimental). Based on the background and data provided, hypothesize whether Mytilus
would have an increasing or decreasing population trend over time. Provide a rationale for your response.
Answers
Mytilus would have a decreasing population trend over time.
What is a control and experimental treatment?In an experiment, the control group either receives no treatment, a standard treatment whose effect is known, or a placebo.
The experimental group also known as the treatment group, receives the treatment whose effect the researcher is interested in.
In the experiment on the effect of the presence of Pisaster on the population of Mytilus, the data obtained is given in the picture.
Based on the data obtained, it can be hypothesized that the population numbers for Mytilus would have a decreasing population trend over time.
In conclusion, the population of species change with changes in factors affecting population such as predators.
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(2pts) Explain what is drop-out and how it helps to reduce over-fit. Please explain clearly how weight changes during training and inference times.
Answers
Dropout helps to prevent overfitting in deep neural networks. During training, some proportion of neurons are randomly set to zero, forcing the network to learn redundant representations.
During training, a dropout layer randomly sets some proportion of neurons to zero. This forces the network to learn redundant representations and makes it less likely to overfit to the training data. Dropout is a regularization method that is particularly effective in deep neural networks, where overfitting can be a significant problem.Weight changes during training and inference times differ. During training, the weights are updated in order to minimize the loss function. During inference, the weights are frozen and the input is passed through the network to produce a prediction. Since dropout layers are only active during training, the weight changes during inference are different from those during training.
Dropout is a powerful regularization method that helps to prevent overfitting in deep neural networks. During training, some proportion of neurons are randomly set to zero, forcing the network to learn redundant representations. The weight changes during training and inference are different, since dropout layers are only active during training.
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A lake has begun to degrade due to an increase in human activity and urbanization. The main cause of this degradation is that the oxygen carrying capacity of the water has decreased due to an increase in the discharge of organic substances (especially phosphates) in the lake due to fertilizer runoff from local farms. This increase in organic substances has allowed aquatic plants, including algae, in the lake to grow at an increased rate. As these aquatic plants die, excessive oxygen is used in the decomposition process, which leads to oxygen deprivation and fish kills. This results in reduced animal populations in the lake, and the decomposition process releases more phosphates back into the water to feed even more plant growth. This dramatic increase in plant growth is called eutrophication and can make water unfit for human consumption.
A scientist wants to come up with a solution to help minimize eutrophication as a way to maintain the lake’s natural ecosystem without eliminating any of the lake’s native populations. Which of the following would be the best solution for the scientist to implement?
A.
treating all runoff with metal complexes that are poisonous to algae populations
B.
asking the farmers in the area to only use fertilizer on their crops when it is raining or windy outside
C.
spraying clay on the aquatic plants so that they sink to the bottom of the lake to decompose
D.
creating buffer strips around the lake using land vegetation to trap fertilizer runoff and prevent it from reaching the water
Answers
Answer: The best solution for the scientist to implement would be D, creating buffer strips around the lake using land vegetation to trap fertilizer runoff and prevent it from reaching the water. This solution would help to reduce the amount of organic substances, particularly phosphates, in the lake, which is the main cause of the eutrophication. Buffer strips would help prevent runoff from reaching the lake by trapping it in the vegetation surrounding the lake. This solution is environmentally friendly and would not harm any of the lake's native populations. Option A, treating all runoff with metal complexes that are poisonous to algae populations, could be harmful to the ecosystem of the lake and would not be a sustainable solution. Option B, asking farmers to only use fertilizer on their crops when it is raining or windy, may not be a practical solution as farmers need to fertilize their crops, and weather conditions may not always allow for it. Option C, spraying clay on the aquatic plants, may not be effective in the long run as it would not address the root cause of the problem, which is the excess nutrients in the lake.
Explanation:
anatomically, women have more portals of entry in the reproductive system compared to men. (true or false
Answers
It is TRUE because women have a larger and more complex reproductive system, including the cervix and vagina, which provide additional portals for pathogens to enter.
Anatomically, women have more portals of entry in the reproductive system compared to men. This is because women have a larger and more complex reproductive system, which includes the ovaries, fallopian tubes, uterus, cervix.
Men, on the other hand, have a simpler reproductive system, which includes the testes, epididymis, vas deferens, prostate gland. The vagina is the primary portal of entry for women, but there are also additional openings in the cervix and uterus that can allow for the entry of bacteria or viruses.
This anatomical difference can make women more susceptible to certain types of infections, such as urinary tract infections or sexually transmitted infections, compared to men. It is important for both men and women to practice good hygiene and safe sexual practices to reduce the risk of infections.
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What type of chemical bond is responsible for the 3 dimensional structure of nucleic acids?
Answers
Hydrogen bonds are responsible for the 3-dimensional structure of nucleic acids, such as DNA and RNA, providing stability through complementary base pairing.
The 3-dimensional structure of nucleic acids, such as DNA and RNA, is primarily determined by hydrogen bonds. Hydrogen bonding plays a crucial role in stabilizing the double helical structure of DNA and the folded structure of RNA. These bonds form between specific complementary base pairs: adenine (A) with thymine (T) or uracil (U) in RNA, and guanine (G) with cytosine (C).
Hydrogen bonds involve the attraction between a hydrogen atom bonded to a donor atom (e.g., nitrogen or oxygen) and an acceptor atom (e.g., oxygen or nitrogen) in the adjacent nucleotide. Multiple hydrogen bonds between the base pairs provide strength and stability to the nucleic acid structure. Additionally, other non-covalent interactions, such as van der Waals forces and electrostatic interactions, contribute to the overall stability and folding of nucleic acids.
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which of the following components form part of a company's macro-environment?
Answers
The components that form part of a company's macro-environment are; Legal/regulatory conditions, Political factors, and Sociocultural forces. Option A, B, and E is correct.
Legal/regulatory conditions; These encompass the laws, regulations, and policies established by the government or regulatory bodies that affect the operations and activities of a company. They include areas such as labor laws, environmental regulations, consumer protection laws, and industry-specific regulations.
Political factors; These refer to the political environment in which a company operates, including government stability, political ideology, trade policies, taxation policies, and political influence on business operations.
Sociocultural forces; These represent the social and cultural aspects that influence a company's operations, such as demographics, social values, consumer attitudes, lifestyle trends, cultural norms, and societal expectations.
Hence, A. B. E. is the correct option.
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--The given question is incomplete, the complete question is
"Which of the following components form part of a company's macro-environment? A. legal/regulatory conditions B. political factors C. ancillary communications D. historical incentives E. sociocultural forces."--
what evidence do psychologists put forth in support of the validity of intelligence tests?
Answers
Psychologists support the validity of intelligence tests through evidence such as test-retest reliability, construct validity, predictive validity, factor analysis, cross-cultural validity, and neurological correlates.
Psychologists provide several lines of evidence to support the validity of intelligence tests. Here are some key points:
1. Test-retest reliability: Intelligence tests demonstrate consistent results upon repeated administration. Individuals tend to receive similar scores when taking the same test on different occasions, indicating the reliability of the test.
2. Construct validity: Intelligence tests are designed to measure the construct of intelligence, which is supported by extensive research and theoretical models. The tests capture cognitive abilities, problem-solving skills, and mental agility, reflecting the underlying concept of intelligence.
3. Predictive validity: Intelligence test scores have been shown to predict important real-world outcomes, such as academic achievement, job performance, and even health outcomes. People with higher scores on intelligence tests tend to perform better in these areas, indicating the predictive validity of the tests.
4. Factor analysis: Through factor analysis, psychologists have identified a general factor, known as the g factor, which represents overall intelligence. This g factor has been found to be correlated with performance across various cognitive tasks, providing evidence for the construct validity of intelligence tests.
5. Cross-cultural validity: Intelligence tests have been developed and validated across different cultures and languages. Studies have shown that the tests measure intelligence consistently across diverse populations, supporting their cross-cultural validity.
6. Neurological evidence: Research using brain imaging techniques has revealed that intelligence is associated with specific brain regions and neural networks. The neural correlates of intelligence align with the cognitive abilities measured by intelligence tests, providing converging evidence for their validity.
It's important to note that while intelligence tests have substantial support for their validity, they are not without limitations. Factors such as cultural bias, limited scope, and individual differences can influence test performance. Psychologists continue to refine and improve intelligence tests to enhance their validity and address potential biases.
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Which two systems are interacting based on the diagram?
Select one:
A. Muscular and Integumentary
B. Nervous and Immune
C.Endocrine and circulatory
D.Exreory and circulatory
Answers
Can you explain in simple words what is the “Theories of translocation” please?
Answers
Translocation theories refer to the process that explain water transportation in plants. We found three great theories: capillarity, root pressure and cohesion. Capillarity refers to the property that displays water when encounterd with small tubes, water "sticks and climbs" through the tube. The smaller the diameter the greater the climbing. Root pressure, refers to the effect salts and minerals absorbed in root, along water, exert in the content previously absorbed. That is, the "new generation of nutrients" pushes upward nutrients previously absorbed. Finally, cohesion theory is similar to capillarity. It refers to the property water molecules have to keep in close contact, due to their hydrogen bonds. Water forms a continuum through the plant. Water is losed through evapotranspiration in the leaves, so as water is losed, water from the stem starts to move. In that way water keeps the "continuum" and fills the gap that evaporated water left.
Which best defines a gene?
A. A gene is a unit of protein that contains the
genetic code.
B. A gene is a unit of DNA that contains code
for the creation of one protein.
C. A gene is a unit of DNA that contains the
code for the creation of amino acids.
D. none of the above
Answers
List specific environmental conditions that caused more algal blooms.
Answers
Answer:
• periods of droughts
•climate change
•intense storms
Do you think an organism can survive alone in nature. justify your view.
Answers
Answer:
no it cannot live alone because nature depends on everyone
Explanation: an organism cannot live in isolation far from other organisms, mainly because of the food chain. Organisms depend on other organisms for energy, unless it is a plant but even then...plants share resources through underground root networks.
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