Studying the necessary content, going through lecture notes and textbooks, and working through practise questions and quizzes are the best ways to get ready for an exam.
How do cells work and how do they look?Cells are the essential building components of all living things.There are many billions of cells in a human body. In addition to providing the body with structure, they also absorb nutrients from meals, convert those nutrients into energy, and carry out certain jobs.
Who first identified cells?The cell has a long and interesting history, beginning with Robert Hooke's discovery in 1665 and leading to many of today's scientific discoveries.
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When Jared eats a barracuda he only gets about 10% of the energy that the barracuda obtained from the flying fish it ate. Explain 3 reasons why so little energy is passed to Jared ?
Answer:EAT THE BARRACUDA
Explanation:FOOD
In what way is a decomposing log in a forest a microhabitat?
A
B
C
D
It supports a distinct population of organisms, but the forest houses the log its
It provides camouflage for particular organisms to protect them from predators
It decomposes into organic matter that enriches the soil.
It is a large community of organisms that occupy a major habitat.
A microhabitat is an area within a larger habitat that is smaller in size, has certain environmental characteristics, and supports a particular population of species.
What is a microhabitat, exactly?An organism lives in a considerably smaller environment known as a microhabitat. Microhabitats are typically used to describe the environments in which tiny animals, such as worms or beetles, reside.
What does a microhabitat for an organism consist of?A small area that differs in some manner from the habitat around it is called a microhabitat. It's possible for unique species to live there that are absent from the surrounding area. Unfortunately, a number of habitats are in jeopardy because of weather extremes, pollution, or deforestation.
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The law of conservation of mass is correctly demonstrated in which statement about the process of
cellular respiration?
O The mass of glucose is equal to the total mass of the water molecules.
O The mass of the glucose is conserved in the mass of the ATP in the products.
O The total mass of oxygen is conserved in the total mass of carbon dioxide produced.
O The total mass of glucose and oxygen is equal to the total mass of carbon dioxide and water.
Is it possible for a population’s genotype frequencies to change from one generation to the next but for its gene (allele) frequencies to remain constant? Explain by providing an example.
Yes, it is possible for a population's genotype frequencies to change from one generation to the next, but for its gene (allele) frequencies to remain constant.
What is genotype?A person or an organism's genotype, or genetic make-up, determines the hereditary traits and qualities they inherit. It alludes to the complete set of genes or genetic material (DNA) that makes up an organism. The genotype of an organism determines its morphological and behavioral traits, such as height, eye color, and susceptibility to specific diseases.
While a population's gene (allele) frequencies can remain constant, its genotype frequencies may shift from one generation to the next. Gene frequency changes in a small population are referred to as "genetic drift," which is the term used to describe this phenomena.
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Two species of fish live in the same pond. they eat the same kinds of plants. they are eaten by the same water birds. which of the following would increase competition between these two species of fish? Explain why.
a. Average habitat temperate increases
b.population of water birds increases
c.number of food plants increases
d.water level in the pond decreases
The option that would increase competition between the two species of fish is (c) an increase in the number of food plants in the pond.
Competition between two species occurs when both species use the same resources, such as food, water, or habitat. In this case, the two species of fish eat the same kinds of plants and are eaten by the same water birds.
If the number of food plants in the pond were to increase, this would increase the number of resources available to the fish. As a result, the two species would have to compete for the same food resources, and the competition between them would become more intense.
The other options are not likely to increase competition between the two species of fish in this scenario. An increase in average habitat temperature (a) may affect the behavior and physiology of the fish, but it is unlikely to directly impact competition between them. An increase in the population of water birds (b) would likely increase predation pressure on the fish, but it would not directly affect their competition for resources. Finally, a decrease in the water level in the pond (d) may limit the available habitat for the fish, but it would not directly increase their competition for resources.
~~~Harsha~~~
In which biome do you live? Describe the plant life and climate characteristics that support your conclusion.
Answer in 3 to 4 complete sentences.
Answer:
Biome: temperate forest
The temperature varies widely from season to season with cold winters and hot, wet summers. The average yearly temperature is about 10°C. The areas in which deciduous forests are located get about 750 to 1,500 mm of precipitation spread fairly evenly throughout the year.
Pretend that eyes only come in three colors, brown, green and blue. Eye color is dependent on two genes. Brown or blue on the first, and green or blue on the second. (This will be a Punnett Square with two traits.) The first gene controls a colored layer near the front of the eyeball (nearest the observer). If this colored layer is brown (BB or Bb), the observer will see brown eyes and the second layer will not be seen. If the first layer is blue (bb), the observer will see through that layer to the second colored layer behind it. The second colored layer can be green (GG or Gb) or blue (bb). If a woman has green eyes, what are her possible allele combinations on her genes for eye color (her possible genotypes)? List them all.
Eye pigment is triggered on 16 separate genes, the majority of which are located on the 15th chromosome hect region and RCC1-like region-containing proteins 2 (HERC2) or ophthalmic colorblindness (which is, ocular albinism) II (OCA2).
What exactly are genotypes and allele combinations?The genetic makeup of a living being is the set of alleles that it possesses. If the paired genes are the same, an organism is said to have been homozygous with respect to the feature; if they are distinct, the species is said the be heterozygous for the particular characteristic.
What is the allele combination for a specific gene?The genetic makeup of a living being is the precise set that polymorphisms for an ancestral gene inside an individual organism, and the characteristic that is connected to that genotype is referred to as the phenotype of that organism (as indicated above).
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Write a
report on global warming.
Scientists have spent a long time researching the issue of global warming. It speaks of an overall rise in the average surface temperature of the Earth.
Short report about global warming: What Is It?A process known as global warming occurs when the planet's average temperature rises as a result of higher greenhouse gas concentrations. The incoming solar energy is trapped by greenhouse gases including carbon dioxide, methane, and ozone.
What is an introduction to global warming?Describe global warming. The extremely quick rise in the average surface temperature of the Earth during the past century is known as global warming, and it is mostly a result of greenhouse gases produced by humanity burning fossil fuels.
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Which statement best describes ecosystems on Earth?
O A. Most of Earth's ecosystems are in rain forests.
B. Separate ecosystems on Earth can affect one another.
C. Desert ecosystems are the most productive ones on Earth.
о D. Earth's largest ecosystems are on land.
On Earth, several ecosystems can influence one another. Ecosystems on Earth are best characterised by this phrase. Ecosystems interact and have an impact on one another rather than being in isolation.
What one phrase best describes an ecosystem?An ecosystem is a place where various plant, animal, and other organism types live side by side in harmony with their surroundings, such as the climate and terrain.
Which of the Earth's ecosystems are named?The biosphere is the general term for all ecosystems on Earth that sustain life. Deepest tree roots, murky ocean trenches, lush rain forests, majestic mountain summits, and transitional places like this one where marine and terrestrial ecosystems meet are all included in the biosphere.
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2. Where is the muscle of the heart strongest, how can you tell?
Answer:
The left ventricle
Explanation:
as its the largest and strongest on your heart
What happened to the gas prices during the oil embargo 
A. They increased dramatically
B. They decreased dramatically.
C. They stayed the same.
The gas prices during the oil embargo They increased dramatically.
Arab OPEC countries put an embargo on the United States during the Arab-Israeli War of 1973 in retribution for Washington's decision to resupply the Israeli military and to use this as leverage in the peace talks that followed the conflict.
Arab OPEC members further expanded the boycott to nations like the Netherlands, Portugal, and South Africa that supported Israel. Oil exports to the countries under the embargo were prohibited, and oil output was reduced.
The impacts of the embargo were made worse by the instability of a decades-old pricing system that had already been caused by several years of talks between oil-producing countries and oil multinationals.
Thus, The gas prices during the oil embargo They increased dramatically.
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Acid from lynches breaks down the rock into particles. these particles mix with the remains of dead lynches to make soil. What is this called?
The stated process is also referred to as biological weathering or "biotic weathering."
What kinds of weathering are considered biological weathering?The motions of plants and animals result in biological weathering. For instance, a plant may grow in a fissure in a rock and, as its roots develop, cause the crack to spread. In the crack, a rabbit may also dig, enlarging it until it ultimately separates the rock. You could even contribute to weathering!
What exactly is biological or biotic weathering?By using their roots or root exudates, plants may weather rocks biologically. Although the process is gradual, it might have a big impact on how the landscape is formed.
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20 points
8. Is ecological succession best described as a progression of small changes, or one large change? Explain.
Analyze the graphs below. Which growth model would apply to a population of squirrels arriving on a new island? Assume the squirrels have no way to leave.
A logistic growth model is most appropriate for expanding squirrel populations to new islands.
Give a brief account on logistic growth model.A logistic growth model is one that incorporates carrying capacity to show how growth slows when a population reaches a point where the amount of resources is limited. As the population grows, the organism's population reaches the carrying capacity and stays there. This is the maximum population the environment can support.
Population grows more slowly as it approaches carrying capacity (K), or the maximum population that the surrounding area can support according to the population logistic model. According to this declaration, all members of the population have equal access to resources and chances of survival.
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In science, one example of a theory is the cell theory. If a scientist collects evidence that questions the basics of a scientific theory, this means the theory is
A. flawed to the point of being invalid
B. going to be refined by further investigation
C.going to be proven wrong
D. not based on fact or evidence
Answer: B. going to be refined by further investigation
Explanation: When it comes to a scientific theory, it is refined in order to represent the new findings. If the new findings go completely against the theory, it is proven wrong and rejected.
. In domestic cattle the spotting pattern of the coat can be controlled by several alleles. The Dutch
belt pattern is controlled by a dominant allele “A”. The Hereford pattern is “a1”, a solid pattern is “a2”,
and the Holstein pattern is “a”. The Dutch belt pattern is dominant to all other alleles. The Hereford
pattern is dominant to the solid and the Holstein pattern. The solid pattern is dominant to the Holstein
pattern and the Holstein pattern is recessive to all. So the dominance pattern looks like this: A>a1>a2>a.
Use this information to answer the following questions.
a. Can Holsteins produce Hereford offspring? Explain your answer.
b. Can Herefords produce solid offspring? Explain your answer.
c. Is it possible for two parents with different color patterns to have four offspring all with
different phenotypes? Explain your answer. Include a Punnett square or squares to explain
your answer.
Yes, Holsteins can produce Hereford offspring. Holsteins have the "a" allele, which is recessive to the "A" allele for the Dutch belt pattern, and the "a1" allele for the Hereford pattern.
What is allele?Alleles are different forms of the same gene. Each gene has two alleles, one inherited from each parent. Alleles can be dominant, meaning they mask the effect of the other allele, or they can be recessive, meaning they are only expressed when two recessive alleles are present. Alleles can also be codominant, meaning they each contribute to the phenotype.
a. Yes, Holsteins can produce Hereford offspring. Holsteins have the "a" allele, which is recessive to the "A" allele for the Dutch belt pattern, and the "a1" allele for the Hereford pattern. Since "A" and "a1" are both dominant alleles, the offspring of a Holstein and Hereford parent will have the Hereford pattern.
b. Yes, Herefords can produce solid offspring. Herefords have the "a1" allele, which is dominant to the "a2" allele for the solid pattern. Since "a1" is dominant to "a2", the offspring of a Hereford and solid parent will have the solid pattern.
c. Yes, it is possible for two parents with different color patterns to have four offspring all with different phenotypes. For example, if the father has a Dutch belt pattern (Aa1a2a) and the mother has a Hereford pattern (Aa1aa), the Punnett square would look like this:
Father: Aa1a2a
Mother: Aa1aa
A A Aa Aa
a a1 a1
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PLEASE HELP.
Read the information on page 2 of this activity. Then, follow the procedure on page 3 to model
conventional agriculture using the Resource Use and Conservation Virtual Lab. Use the
following tables to record the data you collect. (6 points)
1
Year
0
Land usage
(cropland)
Land usage
(forest)
Land usage (grassland
and wetland)
Population
The paragraph describes how modern technology have changed traditional agriculture, increasing food production while also creating environmental damage, soil depletion, a loss of biodiversity, and an increase in the usage of pesticides.
What effect does agricultural biodiversity have?Several essential ecosystem services are provided by it, including the creation and maintenance of good soils, pollination of plants, insect control, and the provision of habitat for animals, including fish and other species essential to food production and agricultural livelihoods.
What effects does biodiversity loss have on agriculture and food production?As a result, there is a severe threat to the safety of the world's food supply, and agriculture is less resistant to pests, diseases, and climate change. To better protect and sustainably exploit biodiversity, we need more sustainable food production methods.
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Construct an argument about the effect of changing a section of rainforest into a cultivated field. Use the word community as it is used in the context of biology at least once in one of the premises of your argument
Answer:
See The Explanation
Explanation:
Changing a section of rainforest into a cultivated field can have a significant negative impact on the surrounding community. The rainforest is home to a diverse range of plant and animal species that have coevolved to form complex ecological relationships. These relationships are critical to the functioning of the rainforest community, as each species plays a specific role in maintaining the balance of the ecosystem.
When a section of the rainforest is cleared for agriculture, the community of species that once called it home is disrupted. The removal of native plants and trees can lead to soil erosion, loss of habitat for animals, and changes in water cycles. As a result, the biodiversity of the community is reduced, and the overall health of the ecosystem is compromised.
Furthermore, the cultivation of crops in the newly cleared area can introduce non-native species that can outcompete native species for resources. This can further disrupt the community of the rainforest ecosystem, potentially leading to the extinction of some species.
In conclusion, changing a section of rainforest into a cultivated field can have severe consequences for the surrounding community. It is important to consider the ecological impact of such activities and to find ways to minimize the disruption to the natural community of the rainforest ecosystem.
what is female reproductive system ???
...
explain it here please ..
..
will anybody become my friend here
i'm new
The female reproductive system is a complex system of organs and structures that are responsible for the production of eggs, fertilization, and the growth and development of a fetus during pregnancy. The reproductive system consists of the ovaries, fallopian tubes, uterus, cervix, and vagina.
The ovaries are two almond-shaped organs located on either side of the uterus, and they are responsible for producing eggs and the female sex hormones estrogen and progesterone. The eggs are then released into the fallopian tubes, which are narrow tubes that extend from the ovaries to the uterus. Fertilization occurs in the fallopian tubes when a sperm cell from a male partner meets an egg cell from the female partner.
The fertilized egg then travels through the fallopian tube and into the uterus, where it implants and begins to grow into a fetus. The uterus is a pear-shaped muscular organ that expands during pregnancy to accommodate the growing fetus. The cervix is the lower part of the uterus that connects to the vagina, which is a muscular tube that extends from the cervix to the external genitalia.
The female reproductive system is regulated by the complex interaction of hormones, and it is responsible for maintaining the menstrual cycle, pregnancy, and childbirth. Proper care and maintenance of the reproductive system are important for overall health and well-being.
I hope this information helps you understand the female reproductive system better.
What is the technical term for a substance made out of one or more elements?
Answer:
In science, a substance made from two or more different elements that have been chemically joined. Compound : A substance made of two or more elements that are chemically combined in fixed amounts.
What is the BEST way to identify the external phenotype of an animal?
O A electron microscopy
O B. observation
OC. dissection
OD. DNA analysis
The most accurate method for determining an animal's outward phenotype is observation.
What is a phenotypic example?The term "phenotype" refers to the observable physical characteristics of an organism, such as its structure, course of development, and behaviour. The genotype, or collection of genes that make up an organism, as well as environmental factors that affect these genes, are what determine an organism's phenotype. Among the human phenotypes include height, blood type, eye color, freckles, and hair colour. Height, eye color, and blood type are examples of observable qualities, or phenotype, of a person. The genetic makeup of an individual is called their genotype. The two alleles that a person has inherited for a single gene are referred to by this phrase in more detail. A patient's clinical presentation is the observable manifestation of this genotype, or phenotype.To learn more about phenotype, refer to:
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Fossil fuels that are used to make plastic bags are collected through either mining or drilling. Mining involves digging or scraping to expose and excavate natural resources. Drilling reaches resources which are deep within the ground and allows those resources to flow to the surface. Both methods result in disruptions to the local habitat and emit large amounts of carbon into the atmosphere. Based on this information, which statement best identifies one advantage and one disadvantage of the "It's in the Bag" program?
A
The program reduces carbon emissions released during mining and drilling. However, animals would be negatively affected by the increased number of plastic bags polluting their habitats.
B
The program eliminates the need for fossil fuels by reusing plastic. However, the environment is negatively affected by habitat destruction since the program harvests composite lumber from natural areas.
C
The program eliminates the need to mine resources since composite lumber is made from recycled bags. However, animals would be negatively affected by the decreased number of trees in their habitats.
D
The program reduces the need for harvesting lumber by replacing wood with composite lumber. However, the environment is negatively affected by habitat destruction since the program uses products made from fossil fuels.
The statement that best identifies one advantage and one disadvantage of the "It's in the Bag" program :
The program eliminates the need to mine resources since composite lumber is made from recycled bags. However, animals would be negatively affected by the decreased number of trees in their habitats.
Therefore option C is correct.
What is a habitat?Habitat can be described as summarizing the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species.
The Advantage is that : The program eliminates the need to mine resources since composite lumber is made from recycled bags.
The Disadvantage is that : Animals would be negatively affected by the decreased number of trees in their habitats.
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If a cabbage plant has 9 chromosomes in it’d reproductive cells than it means that it has 18 chromosomes in its/
When cabbage plant has 9 chromosomes in reproductive cells, then it has 18 chromosomes in the cells.
What are chromosomes?Chromosomes are long, thread-like structures made up of DNA and protein that are found in the nucleus of most living cells. They carry genetic information in the form of genes, which are segments of DNA that contain instructions for the development and function of an organism. During cell division, chromosomes replicate and separate into two identical sets, one for each of the two daughter cells.
Chromosomes are genetic material present in all the cells. They are present in the nucleus of eukaryotic cell. Each chromosome of a eukaryotic cell contains DNA and associated proteins is known as histone proteins.
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How do you think resistant pests will impact the future of our crop production?
Answer:
See The Explanation
Explanation:
Resistant pests are becoming an increasingly pressing issue in crop production, and they are likely to have a significant impact on the future of agriculture. Here are a few ways that resistant pests could affect crop production in the coming years:
Increased Costs: As pests become more resistant to traditional pesticides, farmers may need to use more expensive and specialized chemicals to control them. This could drive up the costs of crop production, making it more difficult for farmers to stay competitive and profitable.
Reduced Yields: Resistant pests can also cause significant damage to crops, reducing yields and quality. This can result in lower revenues for farmers and higher prices for consumers.
Environmental Impacts: The use of specialized chemicals to control resistant pests could also have negative environmental impacts, such as increased pollution and harm to non-target species. This could lead to increased regulation and public pressure on farmers to adopt more sustainable practices.
Shifts in Crop Selection: In some cases, farmers may need to shift their crop selection to varieties that are more resistant to pests. This could result in changes to the types of crops that are grown in certain regions, potentially impacting local economies and food systems.
Advancements in Pest Management: However, the challenge of resistant pests is also driving advancements in pest management techniques, such as biological control and integrated pest management. These approaches can help farmers reduce their reliance on chemical pesticides and reduce the risk of resistance.
In summary, resistant pests are likely to have a significant impact on crop production in the coming years, but the full extent of that impact remains to be seen. By adopting new pest management techniques, investing in research and development, and promoting sustainable agriculture practices, farmers can help mitigate the risks of resistant pests and continue to provide high-quality crops to consumers.
The presence of resistant pests can have a significant impact on future crop production which include Decreased crop yields, Increased reliance on alternative pest control methods, and the Development and use of new pesticides.
The impacts of resistant pests on crop production are multifaceted and can vary depending on the specific pest, crop, and geographic region.
Decreased crop yields: Resistant pests have the ability to withstand the effects of pesticides or other control measures that were previously effective. Increased reliance on alternative pest control methods: With the rise of resistant pests, farmers may need to explore and adopt alternative methods of pest control. Development and use of new pesticides: The emergence of resistant pests often necessitates the development and use of new pesticides or pest control methods. The continuous reliance on chemical pesticides alone can lead to a cycle of resistance development and pose risks to human health and the environment.Thus, future crop production may be significantly impacted by the presence of pests that are resistant, including decreased crop yields, a greater reliance on alternative pest control strategies, and the development and usage of new pesticides.
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Why is it that the bonds between the two strands are easily broken during DNA replication and
gene expression?
Answer:
The bonds between the two strands of DNA, specifically the hydrogen bonds between the base pairs, are relatively weak and can be easily broken. This is important for both DNA replication and gene expression.
Explanation:
During DNA replication, the two strands of DNA must be separated so that each strand can serve as a template for the synthesis of a new complementary strand. The hydrogen bonds between the base pairs are broken by the action of specialized enzymes called helicases, which unwind the double helix and separate the two strands. Once the strands are separated, they can be copied by the action of DNA polymerase, which adds new nucleotides to each strand based on the sequence of the template strand.
Similarly, during gene expression, the two strands of DNA must be separated so that the information encoded in the DNA can be used to synthesize proteins. This process begins with the transcription of the DNA sequence into a complementary RNA sequence, which is carried out by RNA polymerase. The RNA polymerase also breaks the hydrogen bonds between the two DNA strands to open up a small section of the DNA helix, which allows the RNA polymerase to read the DNA template and synthesize a complementary RNA strand.
In both DNA replication and gene expression, the ability to break the hydrogen bonds between the two strands of DNA is crucial. If these bonds were too strong, it would be difficult to separate the two strands and copy the DNA or transcribe it into RNA. The weak bonds between the two strands allow for the necessary flexibility and mobility required for the replication and expression of genetic information.
Refer to Figure T and the rear part of a whale and snake. Both have what appear to be a fomur and pelvis. These structures have no useful function and may imply both the whale and the snake-
may have had legs at one time. Which of the following best describes why these structures provide evidence for evolution? (15.1)
whale
Figure T
snake
The presence of vestigial structures such as the femur and pelvis in whales and snakes provides evidence for evolution because it suggests that these animals evolved from ancestors that had functional legs. The vestigial structures have no useful function in the current species, but they suggest that the structures were functional in their ancestors. This is consistent with the theory of evolution, which proposes that species change over time through the process of natural selection. The presence of vestigial structures is one of many lines of evidence that support the theory of evolution.
1. Which of the following is caused by a pathogen:
Anemia
Malaria
Lyme Disease
Cancer
Cough
wavelength of a light wave with 4.5e and speed of 300,000,000
The wavelength of a light wave with a frequency of 4.5e and speed of 300,000,000 m/s is equal to 24,527,839.097376 meters.
The formula which shows the relation between the wavelength (λ), frequency (f), as well as speed of light (c) is:-
λ = c / f
where the value of c is taken as 300,000,000 m/s, i.e. the speed of light in vacuum.
Now, on substituting the given values in the formula, we get:
λ = c / f
= 300,000,000 / 4.5e
= 300,000,000 / 4.5*2.718 (the value of 'e' is rounded-off to 3 significant digits)
It can be also written as:
= 3 x 10⁸ / 4.5*2.718
= 1 x 10⁸ / 1.5*2.718
= 10⁸ / 4.0770
= 10⁸ x 10⁴ / 40770
= 10¹² /40770
= 10¹¹ / 4077
= 24,527,839.097376 meters
Thus, the wavelength of the light wave is equal to 24,527,839.097376 meters.
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What the percentage for normal trait and SSD
Which of the following defines the term data as it is used in this sentence from paragraph 5 of "Scientific
Investigation"?
Scientists go into scientific data collection with clear, expected results in mind, but the researcher must be
prepared for the actual results and remain open-minded to possibilities that evolve during the data analysis
phase of the process.
A: individual facts or statistics
B: any proposition assumed or given
C: any level surface, line, or point used as a reference
D: a basis for horizontal control surveys in engineering
The best definition of data would be: individual facts or statistics as it is used in the Scientific Investigation
What is data?
In this context, data refers to the information collected during the scientific investigation that may be analyzed and used to support or refute a hypothesis.
The sentence emphasizes the need for scientists to remain open-minded during the data analysis phase, as the actual results may not always match their initial expectations. Hence we call call it facts
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