At a crime scene you find a piece of glass with a red, dried liquid, and a yellow fiber on the edge lying on the ground. Upon closer inspection, you notice
that there is also a smudged fingerprint crossing the center of the glass. Your job is to plan and carry out an investigation to analyze this evidence. Explain
how you would collect,
preserve and analyze this evidence. What would you hope to find out from this piece of evidence? Indicate whether the glass, red liquid, fingerprint and yellow fiber are each individual or class evidence. Why?

Answers

Answer 1

Answer:

For smaller glass fragments should be placed in a paper packet and then in an envelope. Larger pieces should be wrapped securely in paper or cardboard and then placed in a padded cardboard box to prevent further breakage. For analyzing the glass I would start by comparing the refractive index of the sample to that of the possible source. Examination of samples under a regular microscope or a scanning electron microscope can give detailed information about the sample's physical and chemical characteristics. Since the liquid is already dried all you'd have to do is make sure to package it in paper which works since the glass can go in that. For the fiber I would remove it from the glass and collect it with some trace tape. Then the easiest method to get the fingerprint is called dusting, in which I would use a very fine powder that can stick to the oil in the fingerprint. Once the fingerprint becomes visible, lift it from the surface with clear tape and transfer it to another surface to then take into the laboratory to analyze further.

Glass, the liquid and the fiber would be class evidence while the fingerprint is individual.

Explanation:


Related Questions

the abilty to rapidly and accurately change the direction of movement of the entire body in space is called

Answers

Answer:

agility

Explanation:

I hope this helps!

have a good rest of your day

3.
Using the information from the front page about
Guinea pigs, predict the phenotypic results of a cross
between a heterozygous male and a white female.

Answers

Answer:

hm

Explanation:

I wish i knew this and dont just want points


What relationship is it when one population captures and feeds upon another population?

Answers

Answer:

Predation.

Explanation:

This relationship is called predation. (Predation means the preying of one animal on another)

When comparing protein-coding DNA sequences of similar genes in related species, you find that some of the sequences are longer in one species compared to the other. Which answer option is the most likely number of extra bases that you would find

Answers

The most likely number of extra bases that you would find during changes in protein-coding DNA sequences is one.

What is a Codon?

This is defined as a sequence of three nucleotides which form a unit of genetic code in a DNA or RNA.

Since codons have 3 nucleotides then the most likely number of extra bases could be one  which will code for a different protein.

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In carpal tunnel syndrome, the __________ is compressed.

Answers

Answer:

Median Nerve

Explanation:

In Carpal Tunnel Syndrome the Median Nerve is compressed. This can cause tingling sensations in the fingers. This is caused by pressure on the nerve.

How were clones created prior to the creation of Dolly?

Answers

a cell taken from the mammary gland of a six-year-old Finn Dorset sheep

Does a prokaryotic cell or a eukaryotic cell seem more simple?.

Answers

Answer:

Prokaryotic cells

Explanation:

Prokaryotic cells (Figure below) are usually smaller and simpler than eukaryotic cells. They do not have a nucleus or other membrane-bound organelles.

Examine the process shown above occurring in a DNA molecule. Which statements support the outcome of this process? Select
ALL that apply.
A)
This process is linked to certain cancer types.
B)
This process can have detrimental results to the organism.
This can create a change to the genome, which produces a new phenotype. Eliminate
D)
This process can be repaired by the DNA and not be a permanent change
to the genome.
E)
This process affects only the offspring of the organism, but not the
organism itself.

Answers

A DNA molecule is the molecule which carries genetic information for the development of an organism.

What is DNA?

Your information is incomplete. Therefore, an overview of DNA will be given. DNA simply means an organic material that contains genetic information.

DNA is found in the cells of every organism and is a key part of reproduction where genetic heredity occurs.

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Answer:

A, B,C,D

Explanation:

i just did it on usatestprep

All of earth that is inhabited by life is called the.

Answers

Answer:

Biosphere

Explanation:

the cell cycle is a repeating sequence of cellular growth and division during the life of

Answers

Answer:

The cell cycle is a repeating sequence of cellular growth and division during the life of an organism.

Explanation:

A cell spends most of its time during the first three phases of the cycle. This is called interphase. A cell will ONLY enter the last two phases when it is about to divide. Once again, the cell cycle is a repeating sequence of cellular growth and division during the life of an organism.

Hope this helps! Have an amazing day! :)

Which part of the upper respiratory system is known as the vocal cords?
A. pharynx
B. larynx
C. trachea
D. bronchi

Answers

Your answer is B. Larynx. That is where the vocal cords can be found!

The part of the upper respiratory system known as the vocal cords is located in the larynx. The correct option is B.

The larynx, commonly referred to as the voice box, is situated between the pharynx (throat) and the trachea (windpipe).

The vocal cords are two folds of mucous membranes within the larynx that vibrate to produce sound when air passes over them, enabling speech and vocalization.

It serves multiple functions, including the production of sound for speech and protecting the airway during swallowing.

The vocal cords are composed of delicate muscle tissue covered by a layer of mucous membrane.

They are positioned horizontally within the larynx, stretching from the front to the back.

When at rest or during normal breathing, the vocal cords are open, allowing air to pass freely through the larynx and into the lungs.

During speech or vocalization, the muscles surrounding the vocal cords tighten, bringing the vocal cords closer together.

As air from the lungs passes through the narrowed gap between the vocal cords, they vibrate rapidly.

These vibrations produce sound waves, which then resonate in the pharynx, mouth, and nasal cavity, allowing us to form words and communicate.

Thus, the correct option is B.

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are chickens or crocodiles close to dinosaurs?

List 3 reasons why

Answers

Answer:

chickens because they have the same body shape and because they are descendants of t-rexs

Match the scenario with the type of teaching/learning technique it distinguishes.
1. Cindy uses a treat to get her dog Ruby to sit

2. Buddy the dog hears a bell before getting his food

3. Java the dog is learning to jump on a stool to steal human food

a. Operant Conditioning
b. Insight Learning
c. Classical Conditioning

Answers

The matching of the scenario with the type of teaching/learning technique it distinguishes are given below:

Cindy uses a treat to get her dog Ruby to sit ----- Operant conditioning. Buddy, the dog hears a bell before getting his food ----- Insight learning. Java the dog is learning to jump on a stool to steal human food ---- Classical conditioning.

What do you mean by Learning techniques?

Learning techniques may be defined as a persistent change in the behavior that develops through experience. It can be modified by changing its surroundings.

Some of the behaviors are heritable to the offspring from their parents, while some of them are learned as per the demand of the environment.

Therefore, all the scenarios with the type of teaching/learning technique it distinguishes are matched above.

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The bulging deposit that forms around the area of the break during the healing of a fractured bone is a.

Answers

i believe the answer is scar tissue

You discover a mutation in the protein-coding sequence of a gene that does not change the amino acid sequence. This makes sense because __________.

Answers

there is a redundancy in the genetic code / a silent mutation has occured

Glucose is generally used in cells as a source of
a quick energy
b. material for growth
C. material for repair
d. answer not given

Answers

Answer:

A quick energy

Explanation:

Most of the cells in your body use glucose along with amino acids (the building blocks of protein) and fats for energy. But it's the main source of fuel for your brain.

In situ hybridization can be used to localize a gene of interest due to the ability of a cloned DNA sequence to hybridize to a chromosome through_______.

Answers

Answer: In situ hybridization is a technique that is used for localization and detection of specific DNA and RNA sequences in cells, preserved tissue sections, or entire tissue.

The data shows the changes in temperature and the concentration of carbon dioxide (CO2) in Earth’s atmosphere during the past eight hundred thousand years.
Which statement describes the overall relationship between the concentration of carbon dioxide and atmospheric temperature?
A The temperature of Earth increases with a decrease in atmospheric carbon dioxide.
B The temperature of Earth increases with an increase in atmospheric carbon dioxide.
C The temperature of Earth remains unchanged with an increase in atmospheric carbon dioxide.
D The temperature of Earth remains unchanged with a decrease in atmospheric carbon dioxide.

Answers

The answer is c



Because c is always the correct answer

First photo of dna which helped scientists understand its structure.

Answers

Answer:

Franklin´s Photo 51 helped scientists learn more about the three-dimensional structure of DNA and enabled scientists to understand DNA´s role in heredity. X-ray crystallography, the technique Franklin used to produce Photo 51 of DNA, is a method scientists use to determine the three-dimensional structure of a crystal

Explanation:

i hope i was helpful

If you wanted to see a cell wall, where could you look?.

Answers

Answer:

A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism.

Explanation:

A cell wall is a rigid, semi-permeable protective layer in some cell types. This outer covering is positioned next to the cell membrane (plasma membrane) in most plant cells, fungi, bacteria, algae, and some archaea.

just outside of the cell
membrane , the cell wall is located

Consider a food web in which snakes eat mice; toads eat beetles; owls eat mice and toads; eagles eat rabbits, snakes, and owls; cougars eat deer; and foxes eat rabbits and mice. What animal occupies (gets energy in) more than one trophic level

Answers

The animal that takes energy from more than one trophic level is eagle due to eating of many organisms.

Which animal gets energy in more than one trophic level?

The eagle is the animal that takes energy from more than one trophic level in the given food web because in this food web eagle feeds on animals such as rabbit, reptile such as snake and bird such as owls.

So we can conclude that the animal that takes energy from more than one trophic level is eagle.

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In this case, the owls and eagles are two animals that occupy more than one trophic level in the food web.

What is a trophic level?

A trophic level is a specific position in the food web that one population and/or organism occupies in the ecosystem.

An organism can have different roles in an ecosystem and thus occupy more than one trophic level.

Organisms in the first trophic level are called producers, whereas primary consumers are located in the second level.

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write 2 sentences about the Immune System

Answers

A complex network of cells, tissues, organs, and the substances they make that helps the body fight infections and other diseases.
The immune system includes white blood cells and organs and tissues of the lymph system, such as the thymus, spleen, tonsils, lymph nodes, lymph vessels, and bone marrow.

What is the difference between freshwater standing-water habitats and running-water habitats?.

Answers

Running water is better able to dissolve oxygen and nutrients than standing water

How does a successful immigration rate impact the biodiversity of an island?

Answers

Answer:

as the number of species present increases, the immigration rate decreases

Explanation:

According to ETIB, the number of species present on an island is determined by a balance between immigration and extinction. Generally, as the number of species present increases, the immigration rate decreases and the extinction rate increases.

A successful immigration rate impact the biodiversity of an island in several ways.

How does a successful immigration rate impact the biodiversity of an island ?

By the studies of several scientists, the number of species present on an island is determined by a balance between immigration rate and extinction rate. Generally, as the number of species present increases, the immigration rate increases and the extinction rate decreases. Therefore a successful immigration rate provides the animals and birds to migrate from different parts of the world and settle down in a particular island. Therefore for a greater amount of immigration rate, the biodiversity of the island is maintained in a good order. Therefore for a good immigration rate, the biodiversity of a land is largely increased.

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Which scientist formulated the theory of evolution.

Answers

Answer:

Charles Darwin

Explanation:

The theory of evolution is a shortened form of the term “theory of evolution by natural selection,” which was proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century.

Hope this helps!

The portion of the circulatory system governed by the right side of the heart is __________ circulation.

Answers

The portion of the circulatory system governed by the right side of the heart is _pulmonary_ circulation.

There are two types of circulation,

systemic circulationpulmonary circulationWhat is pulmonary circulation?

Pulmonary circulation is developes between the heart and the lungs.

The pulmonary arthery leaves the heart from the right ventricle, divides into two ramifications, and carries deoxygenated blood from the heart to the lungs.

Once in the lungs, the blood release carbon dioxide and takes oxygen.

Carbon dioxide is released from the body by exhalation. Blood takes oxygen from small air sacs named alveoli.

Finally, oxigenated blood returns to the heart through pulmonary veins.

The portion of the circulatory system governed by the right side of the heart is _pulmonary_ circulation.

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State and describe two points of evidence that support the theory of evolution

Answers

Answer:

DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are. Biogeography. The global distribution of organisms and the unique features of island species reflect evolution and geological change.

Explanation:

The rainforest contains what percentage of all of the different species in the world?.

Answers

10 percent of it contains all the species in the world

Understanding the Immune System
A _____ is an agent that can cause infections and diseases

Answers

I would say virus, pathogen is also a possible answer because they are relatively similar, but specifically fungi, viruses, bacteria, and parasites can cause infections and diseases

Which of the following is true about adaptation?
1. It is random
II. It results from genetic mutations.
III. It creates new types of species.
O I, II and III
O I and II
O ll and III
Ol only

Answers

The following which is true about adaptation include the following:

It is random.It results from genetic mutations.It creates new types of species.

What is Adaptation?

This is the process in which an organism become more suited to its environment as a result of genetic mutations.

This creates new types of species  over a period of time and is a random process which is why option A was chosen.

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A fluent reader will:A)ask questions while reading.B)use personal knowledge and experience to help understand the text.C)self-monitor comprehension.D)All of the choices are correct. The Nansei Islands, where some residents are deeply concerned about events concerning Taiwan, are part of what Asian country? The function f(x) = x2 has been translated 9 units up and 4 units to the right to form the function g(x). which represents g(x)? g(x) = (x 9)2 4 g(x) = (x 9)2 4 g(x) = (x 4)2 9 g(x) = (x 4)2 9 A looting mob is a good example of Group of answer choices minority influence. deindividuation. social loafing. social ostracism. It's doubtful that Senator Garvey knows anything about family values. I understand his own grandson has become a ta. I'd never vote for Denise Wyman for Congress. A few years ago, her brother-in-law was convicted of insurance fraud. The above are examples of which logical fallacy? (Click on your choice.) A Straw man (an argument is made by claiming an opponent holds an extreme position and then opposing that extreme position) B Personal attack (ignores the issue under discussion and concentrates instead on the character of the opponent) C Circular reasoning (a statement repeats itself rather than providing a real supporting reason to back up an argument) GIVING BRAINLIEST TO THE PERSON THAT CAN EXPLAIN THIS THE BEST (: What is an accurate description of Lewis and Clark?War Hawks who convinced President James Madison to go to warleaders of the expedition to explore the Louisiana Territoryheroes of the War of 1812 An oil droplet is sprayed into a uniform electric field of adjustable magnitude. The 0.11 g droplet hoversmotionless (gravity force equalling electrostatic force) when the electric field is set to 370 N/C and directeddownward. a) Determine the sign and magnitude of the charge on the oil droplet.b) Determine the approximate number of excess electrons that are on the oil droplet. What is the perimeter of the given figure?A) 14 inchesB) 28 inchesC) 120 inchesD) 19 inches What is converted to electricity at geothermal power plants? at geothermal power plants, is converted to electricity. describe how glucose formed in a leaf becomes starch stored in a potato tuber What is the energy of a photon with a frequency of 3. 6 1015 hz? plancks constant is 6. 63 1034 js. Leonard runs a pet-sitting service. He charges $20 per day, which includes three walks and two feedings. He charges $5 for each extra walk. Which expression describes how much Leonard would charge for a single day of pet sitting with w extra walks? The most common form of cancer in women is ________ cancer; the most common cause of cancer death in women is ________. got the answer thanks! When a company listens to a customer, the customer is more likely to be loyal to the business because Which of the following statements is true regarding physicalchanges?SELECT ANSWERA: Burning a log of firewood into ashes is an example of aphysical change.B: physical change results in a change in thecomposition of a substance.C : Physical changes can be reversed.D Melting sugar in water is an example of a physicalchange. What are five steps you can you when writing a personal essay? How can two organisms with a dominant trait for a specific feature produce an organism with a recessive trait for the same feature? Please Help!!! . . . .