Investigators can determine whether a hair sample is human or nonhuman using DNA analysis and microscopic examination. DNA analysis involves comparing the DNA from the hair to human and animal DNA databases while microscopic examination involves looking at distinct structural differences between human and animal hair under a microscope.
Explanation:Forensic anthropologists and forensic scientists often have to distinguish human hair from animal hair in crime-scene investigations. Two methods typically employed are DNA analysis and microscopic examination.
Firstly, DNA analysis can be used. When hair is found at a crime scene, forensic scientists can extract DNA from the root or shaft of the hair. By comparing the DNA sequence from the collected hair sample to both human and animal DNA databases, they can determine whether the hair is human or nonhuman. Bear in mind that this method may require a considerable amount of hair and may not always provide a definite result if DNA is degraded or insufficient.
Secondly, investigators could use microscopic examination to distinguish between human and animal hair. Under the microscope, human hair and animal hair show distinct structural differences. For instance, human hair typically has a smaller and more evenly distributed pattern of scales on the hair shaft compared to animal hair. The medulla (central core) of the hair also differs significantly between humans and animals. In many animals, the medulla is continuous and wide, whereas in humans, it is fragmented or even absent.
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Investigators can distinguish human hair from animal hair by examining the scale patterns on the hair shaft and by using DNA analysis.
Explanation:Crime-scene investigators can distinguish human hair from animal hair in two ways:
Comparison of hair structure: Under a microscope, investigators can examine the scale patterns on the hair shaft. Human hair has imbricate scales, meaning they overlap like roof shingles, while animal hair often has different scale patterns such as coronal scales (similar to a stack of paper cups) or spinous scales (resembling petals).DNA analysis: Forensic scientists can extract DNA from hair samples and compare it to known DNA samples from humans and animals. DNA analysis can definitively determine whether the hair is from a human or nonhuman source.Learn more about Distinguishing human hair from animal hair here:https://brainly.com/question/37170148
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Which best describes carbon dioxide’s path out of the body?
nose → pharynx → larynx → trachea → bronchus → alveoli
alveoli → trachea → bronchus → larynx → pharynx → nose
alveoli → bronchus → trachea → larynx → pharynx → nose
nose → larynx → pharynx → trachea → bronchus → alveoli
Answer: Option C
Explanation: Respiration is the process that involves the exchange of gases. The oxygen from the mouth is move inside the body and the carbon dioxide from the body is moved out of the body by the process of diffusion.
The movement of the carbon dioxide gas out of the body follows a certain path inside the body.
This path starts from Alveoli → bronchus → trachea → larynx → pharynx → nose. This is how the carbon dioxide moves out of the body.
Answer:
Option C
Explanation:
This path helps carbon dioxide throughout the body.
You need to start an experiment and the instructions are to mix 2 g of sodium bicarbonate with 50 ml of distilled water and then mix the solution. Describe what lab apparatus you would use and what safety precautions you must observe when completing this experiment.
You would use a digital scale, a graduated cylinder or beaker, a stirring rod, and safety equipment such as goggles, lab gloves, and a lab apron for the experiment of mixing 2g of sodium bicarbonate with 50ml distilled water. Always handle chemicals with care, wash hands after usage, and dispose of chemicals properly.
Explanation:For this experiment of mixing 2 g of sodium bicarbonate with 50 ml of distilled water, you would need a digital scale to measure 2g of sodium bicarbonate, a graduated cylinder or beaker to measure 50ml of distilled water, and a stirring rod to mix the solution. Always be sure to use appropriate safety equipment such as goggles to shield your eyes, lab gloves to protect your hands, and a lab apron to keep your clothing clean and protected.
It's important to handle all chemicals with care, not to ingest them, and always wash your hands thoroughly after experimenting. Additionally, be aware of how to dispose of chemicals properly.
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What is the "power house" of the cell? A. Centromere B. Lysosome C. Mitochondrion D. Nucleus
What are three facts about meiosis
Final answer:
Meiosis is a cell division process that forms haploid cells with half the number of chromosomes as the parent cell, results in genetically unique gametes due to crossover and independent assortment, and leads to different outcomes in males and females.
Explanation:
Meiosis is a critical process for sexual reproduction, ensuring genetic diversity among organisms. Here are three key facts about this biological process:
Reduction of Chromosome Number: Meiosis reduces the chromosome count by half, resulting in haploid cells. This is in contrast to the parent cell's diploid state, meaning that where the parent cell has two sets of chromosomes (2n), the resulting gametes have only one set (1n).Production of Unique Gametes: Through mechanisms like crossover during prophase I and independent assortment during metaphase I, meiosis ensures that each resulting gamete is genetically unique. This genetic diversity is crucial for the adaptation and evolution of species.Different Outcomes in Males and Females: In humans, meiosis results in four sperm cells for males, each being viable. In females, however, it results in one viable egg and three polar bodies, which are not viable and get reabsorbed into the body.The process includes two rounds of division known as Meiosis I and Meiosis II, each consisting of stages similar to those found in mitosis: prophase, metaphase, anaphase, and telophase.
What are motor voter laws?
Motor voter laws, such as the National Voter Registration Act of 1993, allow citizens to register to vote when applying for or renewing a driver's license and at public assistance offices. These laws aim to increase voter registration and potentially turnout, though their impact is debated. States continue to implement variations on these laws, such as Oregon's automatic voter registration policy.
Explanation:What Are Motor Voter Laws?Motor voter laws, such as the National Voter Registration Act of 1993, are designed to make the process of voter registration more convenient and accessible to citizens. These laws allow individuals to register to vote at the same time they apply for or renew a driver's license. Moreover, states are required to offer voter registration at public assistance offices and state-funded programs for persons with disabilities. Since its inception, the Motor Voter Act has been instrumental in increasing voter registration rates by providing an expedited registration process accessible through government forms, such as driver's license and Social Security benefits applications.
Initially, while there was an increase in registrations, the act didn't significantly boost voter turnout. Over time, states have expanded the options for voter registration, including automatic voter registration at certain ages, same-day registration at the polls, and online voter registration. However, the impact of these laws on voter turnout is still debated, and they have also faced criticisms about data privacy and the implications of mandatory voting. Efforts such as Oregon's automatic registration via driver's license updates aim to further increase registration and voter turnout, though the policy's results and reception continue to be a topic of discussion.
Americans may also encounter voter registration requirements and voter ID laws, which can influence the ease or difficulty of participating in the electoral process. As the landscape of voter registration and voting laws evolves, the balance between facilitating voting access and ensuring election integrity remains a central theme.
The _____ method can help resolve problems logically.
A.theoretic
B.scientific
C.controlled
D.inquiry
explain ,using numbered steps , how you could find the volume of a small , irregulary shaped rock
To find the volume of a small, irregularly shaped rock, you can use a container with water, measure the initial and final volume of the water, and calculate the difference.
Explanation:Find a container that can hold water, such as a graduated cylinder or beaker.Pour an amount of water into the container that is large enough to submerge the rock.Using a measuring device, record the initial volume of the water in the container.Place the rock into the container, ensuring that it is fully submerged.Again, using a measuring device, record the new volume of the water in the container.Calculate the difference between the initial and final volume of the water. This will give you the volume of the rock.Learn more about Volume of an irregularly shaped rock here:https://brainly.com/question/93702
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Which part of the cell breaks down carbohydrates?
An axon has many branches, each of which swells at its tip. these are known as
In muscle cells, fermentation produces _____. in muscle cells, fermentation produces _____. carbon dioxide, ethanol, and nad+ lactate and nad+ lactate, nadh, and atp pyruvate carbon dioxide, ethanol, nadh, and atp
In muscle cells, fermentation produces lactate and NAD+ through the process of lactic acid fermentation, which occurs under anaerobic conditions and allows glycolysis to continue generating ATP.
Explanation:In muscle cells, fermentation specifically refers to lactic acid fermentation. During this biochemical process, pyruvate produced from glycolysis is reduced to lactate, also known as lactic acid. This process regenerates NAD+ from NADH, which is essential for allowing glycolysis to continue so that the cells can continue making ATP. Unlike alcoholic fermentation, which produces ethanol and carbon dioxide, lactic acid fermentation does not produce these substances.
Essentially, in muscle cells under anaerobic conditions, such as during intense exercise when oxygen is scarce, lactic acid fermentation helps to produce the energy needed by converting pyruvate into lactic acid and simultaneously converting NADH back into NAD+. This is critical because it allows glycolysis to continue producing ATP. Therefore, the correct answer to the question is that fermentation in muscle cells produces lactate and NAD+.
What is one property of viruses that makes it difficult to cure viral infections
Answer: the ability of viruses to hide in the host’s DNA
Explanation:
The skin condition caused by hyposecretion of the oil glands and is an inherited condition is known as
The hyposecretion of the sebaceous glands is known as ACME.
What is sebaceous glands?The sebaceous glands produce a secretion, which is rich in lipids such as
TriglyceridesFatty acids and Cholesterol.It is this substance that ensures skin lubrication, prevents hair drying and prevents excessive water loss.
What is ACME?is one of the main problems that affect the pilosebaceous unit and usually occurs at puberty, when the sebaceous gland starts its greatest production. This problem is characterized by the accumulation of keratinocytes, hyperproduction of secretion by the sebaceous glands, colonization by bacteria and inflammation, which causes the appearance of a characteristic lesion.
With this information, we can conclude that is the hyperproduction of secretion by the sebaceous glands.
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why are regular visits to the doctor important for maintaining your optimal immune health?
Answer:
Option one or A
Explanation:
to be sure that your overall health is good and to receive the necessary vaccinations
What should the shopper have considered before adopting the apple cider and honey diet?
If the shopper decided on having to adopt the apple cider and honey diet, the shopper should consider things like the source credibility, in which the shopper should know whether this diet produces benefit, if It is factual and it is something that will not produce any harmful effects.
How are atoms and molecules important to cell processes
The ultimate source of new inherited traits in a population is __________.
Two of the primary consumers in the food web are the
A. coyote and hawk
B. grass and cactus
C. rabbit and grasshopper.
D roadrunner and lizard
Please help me someone
Why can an excepted hypotheses be rejected at a later date
which of the following pieces of laboratory equipment would be used to measure the mass of one slice of bread?
What senses, outside of hearing, would likely be impaired if a person were somehow missing all of the apparatus of the ear (including the outer, middle, and inner ear)?
Explain how you would construct a linkage map for a human chromosome. What data would you need?
To construct a linkage map for a human chromosome, you would need data on the recombination frequencies between genes. This data can be obtained through breeding experiments or by using molecular markers. Constructing a linkage map involves analyzing inheritance patterns and estimating relative distances between genes.
Explanation:To construct a linkage map for a human chromosome, you would need data on the recombination frequencies between genes. Recombination frequencies can be determined by analyzing the inheritance patterns of traits in a population. More specifically, you would need data on the frequencies of crossing-over events between pairs of genes during meiosis. By comparing the recombination frequencies between different gene pairs, you can estimate the relative distances between the genes on the chromosome.
One way to gather this data is by conducting breeding experiments with organisms that are heterozygous for the genes of interest. By analyzing the offspring, you can determine the frequency at which the genes are inherited together or separated. Another approach is to use molecular markers that are linked to specific genes and analyze their inheritance patterns in a population.
It is important to note that constructing a linkage map is a complex process that requires extensive genetic analysis and statistical analysis of the data collected.
How many millions of americans died from smoking-induced cardiovascular disease, from 1965-2014?
According to the repost made by US Surgeon General released in 2014, a total of 7,787,000 people died from smoking induced cardiovascular disease from 1965 to 2014. Cigarette smoking and second-hand tobacco smoke has been causally linked to cardiovascular diseases.
Fanning your fingers or toes apart is an example of what type of synovial joint movement?
The dominant gas in the atmosphere that forms clouds is
A) oxygen.
B) nitrogen.
C) water vapor.
D) carbon dioxide.
Answer: C). water vapor
Condensation is a process by which the gases form of a substance is converted into it's liquid form. It is very important process for water cycle. The water which gets evaporated from the sea or any other aquatic body gets converted into water vapors. The water vapors being low in density reaches upper layers of the atmosphere, where they condense to form clouds. The dominant gas that forms the cloud in the atmosphere is the water vapor.
How could you demonstrate to a child that solid water is less dense than liquid water?
Organic compounds ALL contain the element carbon. Which organic compound, used for stored chemical energy, contains carbon, hydrogen, oxygen, and often phosphorous? A) carbohydrate B) lipid C) protein D) starch
Answer;
Lipids is the correct answer.
Explanation;
-Lipids is among the four biological biomolecules, the others being proteins, carbohydrates and nucleic acids.
-Lipids are made up of fatty acids and glycerol and are composed of elements carbon, hydrogen , oxygen and they may also contain phosphorus, like in the case of phospholipids which are mainly components of the cell membranes.
-Lipids play major roles in the body which includes, energy source, structural compounds, insulation functions, among other functions.
The B) Lipids are organic compounds used for stored chemical energy that contain carbon, hydrogen, oxygen, and often phosphorous.
Explanation:The organic compound used for stored chemical energy that contains carbon, hydrogen, oxygen, and often phosphorous is lipid. Lipids are a large and diverse group of organic compounds that include fats, oils, and waxes. They provide long-term energy storage and are more energy-rich than carbohydrates.
Lipids also make up cell membranes and are involved in insulation, protection, and hormone production. They serve various essential functions in the body, including energy storage, insulation, and cushioning of organs. They also form the structural basis of cell membranes and are involved in the absorption of fat-soluble vitamins, such as A, D, E, and K.
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Experimental inquiry: what can you learn about the process of science from investigating a cricket’s chirp?
Find the mean of the data: 206, 194, 198, 172, 190
The joint just proximal to the knee is which one of these hip ankle
What caused the taino population on hispaniola to drop from 500,000 to a few hundred by 1542?