The use of DNA in criminal cases became possible due to discoveries in the mid-20th century that proved DNA is the genetic material, leading to techniques like DNA fingerprinting and genomic analysis utilized in cases like the 2001 FBI anthrax investigation.
Explanation:The use of DNA as evidence in criminal investigations became possible thanks to pivotal discoveries in the twentieth century that identified DNA as the genetic material. Groundbreaking experiments by scientists like Griffith and later by Avery, MacLeod, and McCarty laid the foundation by establishing that DNA, and not protein, is the key molecule of heredity. This scientific milestone paved the way for the development of DNA fingerprinting by Dr. Alec Jeffreys, which facilitated the retrieval and analysis of DNA from biological samples such as hair, blood, or saliva. Virtually every individual has a unique DNA sequence, which allows forensic experts to use these genetic markers in the identification process and in solving crimes. The first landmark use of genomics in a forensic case emerged in 2001, with the FBI's investigation into bioterrorism involving anthrax.
Moreover, DNA analysis has transcended its forensic applications and is used in areas such as genealogy, medical diagnostics, vaccine development, and cancer therapy.
Genomic analysis remains an invaluable tool in both legal contexts for evidence validation, as well as in broader scientific research and healthcare practices.
Scientific research about the nitrogen cycle and water quality is most
valuable to human populations with:
A
few sources of electricity.
B. few sources of fresh water.
C. large coastal populations.
D. large amounts of farmland.
Scientific research on the nitrogen cycle and water quality is most valuable to human populations with large coastal populations, as they heavily rely on coastal resources for various purposes. The correct option is C.
Large coastal populations are particularly dependent on the health of marine ecosystems, including water quality. The nitrogen cycle plays a crucial role in maintaining water quality, especially in coastal areas where nitrogen runoff from agricultural activities, sewage discharge, and atmospheric deposition can significantly impact marine environments.
Excessive nitrogen inputs into coastal waters can lead to harmful algal blooms, hypoxia (low oxygen levels), and eutrophication, all of which can have detrimental effects on marine biodiversity, fisheries, and human health. Research on the nitrogen cycle helps to understand the sources, pathways, and impacts of nitrogen pollution, allowing for the development of effective management strategies to mitigate its adverse effects.
Furthermore, large coastal populations often rely heavily on coastal resources for drinking water, recreation, tourism, and economic activities such as fishing and aquaculture. Therefore, maintaining water quality in coastal areas is essential for safeguarding public health, sustaining livelihoods, and preserving the overall well-being of coastal communities.
In conclusion, scientific research on the nitrogen cycle and water quality is most valuable to human populations with large coastal populations due to the significant ecological, economic, and societal implications of nitrogen pollution in coastal environments.
Scientific research on the nitrogen cycle and water quality is most valuable to human populations with:
C. large coastal populations.
Question:-
Scientific research about the nitrogen cycle and water quality is most
valuable to human populations with:
A. few sources of electricity.
B. few sources of fresh water.
C. large coastal populations.
D. large amounts of farmland.
Give an example of how a society can have an effect on scientific research.
Answer: generating new knowledge, improving education and increasing our quality of life
Explanation:
Cure for many kinds of cancer is attained through scientific research.
How a society can have an effect on scientific research?In medicine, we have come a long way. For almost all medical conditions we have a cure nowadays.Technologically we can easily compare the life we used to live 5 years before and the life we are living at present.Everything came out as a result of successful scientific research.Scientific research plays a vital role in the improvement of human lifestyle.To learn more about scientific research refer to:
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please help me i neeeeeeeed it
Answer:
The answer is A
Explanation:
The best and most correct answer among the choices provided by the question is A.) 100%. Hope this helps :)
each trait of a plant is determined by______ A. an allele B. one gene C. a pair of genes D. one dominant gene
Answer:Pair of genes
Explanation:
The trait of the plant can be determined by the the pair of genes that is transferred from the parents to the offspring.
The genes that is carried from the parents has both the pair of genes. The dominant genes that is expressed in the generation is known as dominant gene. It is dominant over other gene.
The gene which is not expressed is known as recessive gene.Hence, the correct answer is option C.
name the glands associated with human digestive system
Answer: consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder).
A hill is made of rock particles of different sizes. Which of these agents of
erosion probably caused the hill to form?
A. Glacialice
B. Waves
C. Wind
D. Flowing water
Answer: The answer is A. Glacial Ice
Explanation:
Final answer:
Flowing water is the most probable agent of erosion responsible for the formation of a hill made of rock particles of different sizes, due to its capacity for erosion and deposition based on particle size and gravity's role in pulling it downhill.
Explanation:
A hill made of rock particles of different sizes is likely influenced by several agents of erosion. Among the listed options, flowing water is the most probable cause for the formation of such a hill. Flowing water can transport rock particles of various sizes through erosion and deposition processes. As water moves over land, it picks up smaller particles first, leaving behind larger particles which can accumulate to form a hill. Besides, water moving over steeper slopes increases erosion potential, contributing to the shaping of the landscape.
Although other agents like glacial ice, wind, and waves can also cause erosion, they are less likely to be responsible for the formation of a hill comprised of rock particles of mixed sizes. Glacial ice, for instance, typically forms more uniform deposits and has a distinct erosion pattern, including features like U-shaped valleys rather than hills mixed with varying particle sizes.
It is important to note that gravity also plays a role in the process of erosion by pulling water and ice downhill, which in turn shapes the earth's surface. Flowing water also contributes to the formation of distinctive geological features through the differential erosion of rocks with varying levels of erosion resistance.
What is the correct term for an area of rotating currents in an ocean?
When ocean currents combine, they create an area of rotating currents called a(n)
Answer:
thermohaline current = thermohaline circulation
What is the purpose of the part of the female reproductive system highlighted below ?
Answer:
A collecting sperm.
Explanation:
its cannot transport eggs, nor does it develope a fetus ,the fetus is delveoped in the womb while eggs are stored in the ovaries
The purpose of the part of the female reproductive system highlighted is option A. Collecting sperm.
What are the functions of Uterus?The uterus is an organ of the female reproductive system. It’s shaped like an upside-down pear and has thick walls. The main function of the uterus is to house and nourish a fetus until it’s ready for birth.If conception occurs, the fertilized egg (the embryo) burrows into the endometrium from which the maternal portion of the placenta, the decidua basalis, will develop.As pregnancy progresses, the uterus grows and the muscular walls become thinner, like a balloon being blown up, to accommodate the developing fetus and the protective amniotic fluid produced first by the mother and by the urine and lung secretions of the baby.During pregnancy, the muscular layer of the uterus begins contracting on and off in preparation for childbirth.Hence, option A is the answer.
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Suppose a person developed a mutation in a somatic cell which diminishes the performance of the body’s natural cell cycle control proteins. This mutation resulted in cancer yet, but was effectively treated with a cocktail of cancer-fighting techniques. Is it possible for this person’s future children to inherit this cancer causing mutation? Be specific when you explain why or why not.
Answer:
awdawd
Explanation:
Refer to the family pedigree shown here. In generation I, one parent is affected by the gene mutation and one parent isn't. In generation II, all three children are affected by the gene mutation. What can you conclude about this gene mutation?
A. All children born in future generations will be affected by this disorder.
B. This gene mutation is a dominant disorder.
C. This gene mutation is a recessive disorder.
D. The generation I mother is a carrier of this gene mutation.
Answer:
B. This gene mutation is a dominant disorder.
Explanation:
Since all the children in generation III do not have the disorder, there is no indication that all the children born in the future generations will be affected by this disorder.
The gene mutation appear dominant from the pattern of inheritance. The children in generation II are all affected because there are two dominant alleles for the disorder in the father. Some of the children in generation III do not have the disorder because only one allele is dominant in the mother, hence, the unaffected children inherited the non-dominant allele from the mother.
The gene mutation is not recessive, otherwise, not all the offspring in generation II are supposed to be affected for the disorder.
The mother in generation I cannot be a carrier because the disorder is a dominant one. There can only be heterozygous for a dominant disorder but they are usually phenotypically affected for the disorder.
The correct option is B.
Answer:
B. This gene mutation is a dominant disorder.
Which structure is the cytoplasm?
Answer:
It is basically the background of the cell where everything sits.
What is a difference between systemic and pulmonary circulation? A. Systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. B. Systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. C. Systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. D. Systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.
Your answer would be D, Systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.
These two circulations are part of the circulatory system, with the pulmonary circulation taking deoxygenated blood to the lungs and returning it oxygenated with the oxygen we breathe in, then that oxygenated blood going around the body delivering that oxygen and coming back deoxygenated.
Hope this helped!
In pulmonary circulation, deoxygenated blood is pumped from the heart's right ventricle, while in systemic circulation, oxygenated blood is pumped from the heart's left ventricle. thus option D is correct.
What are pulmonary and systematic circulation?Pulmonary circulation begins with the right ventricle sending deoxygenated blood to the lungs, where it is oxygenated before returning to the heart in the left atrium. while in the systemic circulation, oxygenated blood is pumped from the heart's left ventricle.
The pulmonary circulation's major purpose is to exchange gases (CO2 and O2) between the blood and the air.
The vascular system that distributes blood from the left ventricle to all of the body's tissues is known as systemic circulation.
The systemic circulation is in charge of maintaining a consistent blood flow via the capillaries in order to facilitate nutrient diffusion.
Finally, deoxygenated blood is pumped from the right ventricle of the heart in pulmonary circulation, whereas oxygenated blood is pushed from the left ventricle in the systemic circulation.
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Which statement best describes the breakdown of food in the digestive system? Carbohydrate digestion starts in the stomach and protein digestion starts in the stomach. Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach. Carbohydrate digestion starts in the esophagus and protein digestion starts in the small intestine. Carbohydrate digestion starts in the small intestine and protein digestion starts in the esophagus.
Answer:
Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
Explanation:
Digestion of carbohydrates start at the moth with the help of salivary amylase which is an enzyme that helps breakdown the polysacharrides found in food with carbohydrates.
Protein digestion on the other hand, begins in the stomach and the duodenum. The stomach releases the enzyme called pepsin, which help breakdown the proteins, with the aid of two other enzymes, chymotrypsin and trypsin which are enzymes released by the pancreas.
Answer:
B, Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
Explanation:
give an example in which the electrical energy changes to sound energy
Answer:
Sound energy is produced when an object vibrates. The sound vibrations cause waves of pressure that travel through a medium, such as air, water, wood or metal.
Explanation:
Please mark brainliest and have a great day!
Vibrations.
➤ Reason[[Im mainly going of the knowledge I already know, I don't know if I'll be wrong about any of this.]]
Electric energy is energy in general, which can totally cause somewhat disturbing vibrations to the surrounding area. Examples of this are thunder, but, the reason this doesn't count as it is actually converting electric energy, into heat energy, into sound energy. The heat warms up the air so fast it creates a wave of pressure, a shock wave, which is powerful enough to rumble into the distance for miles. What would count is electrical energy by itself. Everyone has heard the sound electricity makes when it zaps and buzzes. It can be rather loud to. This is the energy from the electricity causes vibrations, which is sound energy that can be heard by our ears. Electricity can also power things such as speakers which turn electrical pulses into sound that we can hear with our ears, which is kinda amazing. Science is epik.
✧ Oh god no, I dropped my bass, help.╚═⋄═◇═◈═❖═✧═☆═✧═❖═◈═◇═⋄═╝plants that we recognize today spend the majority of their life in the
Answer:
they spend the majority of their life in the Seed phase
Answer:
Sporophyte phase.
Explanation:
The plants present today have sporophyte as the dominant stage of their life cycle. The sporophyte phase is the seed phase and serves to produce spores. Germination of spore leads to the formation of the less conspicuous gametophyte.
Example: flowering plants have dominant sporophyte and reduced gametophyte.
In which type of exercise would fat reserves be used to create ATP
Which the following best compares the functions of the ovaries in the uterus?
Answer:
what are the answer choices ?
Explanation:
How does competition increase stability in an ecosystem?
A a decreases biodiversity
B it keeps population balanced
C it causes cyclical disturbances
D it removes keystone species
Answer:
b
Explanation:
so that the habitat doesnt get overcrowded
The competition increase stability in an ecosystem by keeping population Balanced.
Explanation:
There is increase in competition this will in turn deals with stability in ecosystem. Because this creates continuous food chain where a larger animal will eat the smaller one and this cyclical chain keeps in check. The food chains creates complexities in the biodiversity this again is compensated with increase in population. With a lot more increase in species again the food chain demands the cyclical procedure. This is how in our biodiversity the stability in the organism is maintained.
The product of -2 and a number is at most 10.
Find the possible numbers.
Ons-5
On>-5
On<-5
AVN
on2-5
| |
Answer:
n > -5
Explanation:
Start with -2n < 10. Then you isolate the variable to end up with the above answer. This is so because WHENEVER you divide or multiply by a negative, you reverse the inequality sign.
I am joyous to assist you anytime.
Which of the following is true of red blood cells?
A. They have multiple nuclei
B. Once created in bone marrow, they circulate for our lifetime
C. They live for only 120 days
D. They live for only about 20 days
Answer:
C. They live for only 120 days
Explanation:
Well, not exactly 120 days but they live for about 100-120 days. red blood cells are also called erythrocytes. Unlike other cells, they do not have a nucleus. The red blood cells circulate through the body for about 100 to 120 days and are eventually recycled. Their main function is to carry oxygen to the different parts of the body.
Answer:
C
Explanation:
Match each organ with the germ layer from which it is formed.
mesoderm
ectoderm
endoderm
Answer:
The correct answer would be- intestine: mesoderm, Bone: mesoderm and tooth enamel: ectoderm.
Explanation:
The three germ layers of form during the gastrula stage of the embryo development in triploblastic organisms. Every germ layer gives rise to different organism later in the development.
Ectoderm gives rise to the nervous system, tooth enamel, cornea and lens and epidermis and other.
Mesoderm gives rise to skeleton system, intestine, notochord, stomach and other.
The endoderm gives rise to the respiratory system, urinary system and other.
Thus, the correct answer would be- intestine: mesoderm, Bone: mesoderm and tooth enamel: ectoderm.
Some birds look for food near cattle and other livestock. The movement of
the cattle churns up the ground, making insects available to the birds. The
cattle appear to be unaffected by the presence of the birds. What kind of
relationship exists between the birds and the cattle?
O
A. Parasitism
O
B. Commensalism
O
C. Predation
O
D. Mutualism
I think the answer is B. Commensalism. The cows are unaffected by the birds taking advantage of their stirring up the ground, while the birds benefit. Thus, this is not parasitism, while one organism benefits while the other is harmed, or preparation, where one organism kills the other for food, or mutualism, where both organisms benefit.
The answer is B. Commensalism
Hope this helps!
Commensalism relationship exists between the birds and the cattle.
In commensalism one organism is benefitted and other remain unaffected.What is commensalism?Commensalism is a relationship between two organisms in which one benefits from the other without causing harm to it. The commensal organism obtains food, shelter, locomotion or support.What are the relationship exist in nature?There are five main symbiotic relationships:
Mutualism,Commensalism,Predation, Parasitism,Competition.Hence, B option is correct.
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A - Prophase
B - Metaphase
C - Anaphase
D - Telophase
Choose the correct description for each phase of mitosis.
Label A
|| |||||||||||||||||||||||||||||||
A Centromeres are split apart and sister chromatids are pulled to opposite poles of the cell
B. The chromosomes that were doubled become attached to the spindle fiber by their centromeres
C. Chromatin in the cell coils into chromosomes that can be seen
D. Sister chromatids are separated and contain identical copies of DNA
Intro
Help!
Answer:
A - Prophase:::::::Chromatin in the cell coils into chromosomes that can be seen.
B - Metaphase :::::::The chromosomes that were doubled become attached to the spindle fiber by their centromeres.
C - Anaphase ::::::Centromeres are split apart and sister chromatids are pulled to opposite poles of the cell
D - Telophase:::::::Sister chromatids are separated and contain identical copies of DNA .
Explanation:
Mitosis:
It is the division process of the cell in which cell becomes divide into two equal halves each containing equal amount of DNA.
This division process is further divided into 4 subphases known as
Prophase
Metaphase
Anaphase and
Telophase
Answer:
Label A. Correct Answer Is C.
Label B. Correct Answer Is B.
Label C. Correct Answer Is A.
Label D. Correct Answer Is D.
Explanation:
Edge 2022
Oogenesis ultimately results in the production of how many cell(s).
Answer:
one cell
Explanation:
Oogenesis takes place in the outermost layers of the ovaries, ultimately resulting in the production of one cell.
Answer:
4 cells
Explanation:
Oogenesis ultimately results in the production of 4 cells.
Hope this helps!
Feel free to ask if you have anymore questions!
Archaebacteria use _____ for movement. celia flagella pili cell walls
Archaebacteria use flagella for movement.
How do archaebacteria move?Archaebacteria being unicellular, are extremely small. Their method of movement comes from an organelle known as the flagella and a process known as Brownian movement.
What is flagella in archaea?The archaeal flagellum is a unique motility apparatus distinct in composition and likely in assembly from the bacterial flagellum.
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Which When measuring the volume of a liquid in a graduating cylinder, you measure_____.
at the top of the meniscus
the average between the volume at the top of and the bottom of the meniscus
from the bottom of the meniscus
from the exact top of the liquid
Answer:
Option C, from the bottom of the meniscus
Explanation:
The meniscus in a graduated cylinder represents the volume of the liquid being measured
The prime aim is to take the reading at the center of the meniscus whether it takes concave shape or convex shape
In case of water, the reading is taken from the bottom of the meniscus and in case of mercury the reading is taken from the top of the meniscus.
However, except mercury in most of the cases the reading is taken from the bottom of the meniscus. Hence, option C is correct
Where is the energy in a sucrose molecule stored?
O
A. Inside the hydrogen atoms
O
B. Inside the carbon atoms
O
c. In the bonds between the atoms
O
D. Inside the protons
Answer:
c. In the bonds between the atoms
Explanation:
The energy in a sucrose molecule is stored in the bonds between the atoms.
Hope this helps!
The energy stored in the sucrose molecule is stored in the bonds between the atoms.
Option C
Explanation:
During photosynthesis the sugar molecules are synthesized with help of captured light energy. The bonds between the carbon atoms of sucrose molecule are the covalent bonds and during their breakdown they produces reduced co-factors like NAD and FAD into NADH and FADH2. These reduced cofactors transfer their electrons into electron transport chain which later help ATP synthase to catalyse the production of ATP. Hence the bonds which were made by utilising the photon energy of sun are responsible for the production of energy molecule ATP so the energy is stored in the the bonds between the atoms of sucrose molecule.
What are the two main phases of a cell cycle
Answer:
1. interphase
2. mitotic (M) phase
Explanation:
The two main phases of a cell cycle are interphase and mitotic (M) phase.
Hope this helps! Have a great day!
Answer:
Interphase and mitotic
Explanation:
What would most likely be included in the “Analysis” section of a lab report?
Hello There!
In a science lab report, you would usually include a discussion of any errors in the experimental data.
Which statement best explains why the development of a new area of science can lead to changes in a theory?
A. A new area of science attracts new scientists who study old theories for flaws.
B. A new area of science promotes experimentation from a different point of view.
C. A new area of science allows old theories to be reworded using new terminology.
D. A new area of science encourages scientists to replace old theories with modern ones.
The statement that best explains why the development of a new area of science can lead to changes in a theory is a new area of science promotes experimentation from a different point of view (Option B).
Scientific knowledge, i.e., knowledge of the real world obtained by using the scientific method, allows us to obtain empirical evidence and raise new questions to explain new observations/facts.Thus, empirical evidence can in turn be used to develop new hypotheses in order to explain new observations.Subsequently, hypotheses can be tested (either confirmed or rejected) by experimental and/or observational procedures. Finally, when new knowledge is big enough (well sustained) in itself, it allows us to develop new theories based on a body of empirical knowledge and it can be used in different scientific fields.In conclusion, the statement that best explains why the development of a new area of science can lead to changes in a theory is a new area of science promotes experimentation from a different point of view (Option B is correct).
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