A ________ is a subgroup of people taken from the ________ that you wish to study.
Answers
A sample is a subgroup of people taken from the population that you wish to study.
In exploration, a population refers to the entire group of individualities that you're interested in studying or drawing conclusions about. It may be a specific group of people, similar as grown-ups in a certain region or cases with a particular medical condition. still, studying the entire population is frequently impracticable or insolvable due to factors similar as size, time, and coffers.
Thus, experimenters elect a lower representative group from the population, known as a sample, to gather data and draw consequences about the larger population. slice involves the process of opting individualities from the population in a way that ensures the sample is representative of the population's characteristics. The thing is to gain a sample that directly reflects the diversity and characteristics of the larger population to make valid conceptions or prognostications.
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Give an example of a common “parent-daughter” combination.
the passages is downs below
A common "parent-daughter" combination that geologists use is radioactive uranium and non-radioactive lead. As shown in the diagram above, uranium is trapped in a newly formed rock. As the rock ages, more and more of the uranium changes into lead.
The age of the rock in years can be found by measuring the rate at which a parent element decays and then measuring the ratio of parent element to daughter element in the rock. The ages in years of the different geological time periods are found by measuring the absolute ages of many rocks from all of the different periods. The absolute ages of some of the different geologic time periods are shown along the right side of the Staircase of Time.
The steps of the Staircase of Time are drawn to be almost the same size, so you might think that the time periods are the same length, but they are not. The absolute ages of rocks taken from the different time periods have shown that the time periods were of greatly differing lengths. Some were very short, like the Quaternary period (only 2 million years), while others were very long, like the Proterozoic Era (almost 2 billion years). According to absolute-age measurements, an accurate representation of the lengths of the major geologic time periods is shown in the time bar at right.
link: http://www.cotf.edu/ete/modules/msese/earthsysflr/ages.html
Answers
A common "parent-daughter" combination that geologists use is radioactive uranium and non-radioactive lead.
What is the "parent-daughter" combination about?The passage that is provided above is discussing a method used by geologists to determine the age of rocks. The method is based on the principle of radioactive decay, which is the process by which an unstable, or radioactive, element changes over time into a stable, or non-radioactive, element.
A common "parent-daughter" combination used by geologists is radioactive uranium (parent element) and non-radioactive lead (daughter element).
Therefore, the passage further explains that the age of different geological time periods can also be found by measuring the absolute ages of many rocks from all of the different periods.
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clusters and superclusters often appear to form chains or shells surrounding regions nearly empty of galaxies. these empty spaces are called'
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Clusters and superclusters often appear to form chains or shells surrounding regions nearly empty of galaxies. these empty spaces are called voids.
These voids, which are also referred to as super voids, are composed of intergalactic space, whose average density is far lower than that of the nearby clusters and superclusters.
One of the largest formations in the cosmos, voids can be as large as tens to hundreds of millions of light-years. Void regions may be crucial locations for dark matter studies because they may contain large volumes of dark matter despite their low density.
It has been investigated how the Eridanus Super void, which has a diameter of around 1 billion light-years, might affect cosmic microwave background radiation.
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Why must males inherit colorblindness from their mothers.
Answers
Answer:
below
Explanation:
B/c (red-green) color blindness is found on X-chromosome and males take X-chromosome fron their mother and Y-chromosome from their father.
Which event is most likely evidenced by the appearance of a new organism in the fossil record?
Responses
A new species evolved.
A change in climate occurred.
Optimal conditions finally preserved an old species.
Migration brought back an old species
Answers
The most likely scenario from the appearance of a new organism is that "A new species would have evolved."
What does the evidence from the fossil record show?.
Answers
The evidence from the fossil record show important events and species in the appropriate geologic era.
A species is a taxonomic rank in biology that serves as the basis for classification and as a gauge of an organism's biodiversity. A species is generally defined as the largest collection of sexually reproducing organisms, where any two individuals of the appropriate sexes or mating types can produce fertile offspring. Another way to distinguish between species is through the karyotype, DNA sequence, anatomy, behavior, and ecological niche. Paleontologists also use the chrono species theory because it is unable to analyze fossil reproduction.
There are between 8 and 8.7 million different species of eukaryotes, according to the most recent reliable estimate. In contrast, just 14% of these have been described by 2011.
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Suppose that the genome of an organism is 23% adenine (a). What should be true about the organism's genome?.
Answers
Answer:
its genome is 23% thymine (T)
Explanation:
The rule of Chargaff says that the amount of the adenine (A) and thymine (T) is almost equal and guanine (G) to cytosine (C) and also the amount of A and T should be equal to the amount of the G and C.
So, A= 23 % then T must be 23 %
Then, A+T = 46%.
The left 54% should be divide by 2, G and C that would be 27 %.
Five percent of all individuals in a certain population are carriers of a particular disease. A diagnostic blood test for this disease has a 90% detection rate (that is, positive) for carriers and 5% detection rate for non-carriers. Suppose the test is made for a randomly selected individual. (a) What is the probability that the test is positive? (b) If the test is positive, what is the probability that the selected individual is a carrier?
Answers
(a) The probability that the test is positive is 0.14 or 0.15 or 0.16 or 0.17. (b) If the test is positive, the probability that the selected individual is a carrier is 0.692 or 0.933.
a)The probability is 0.15.The probability of a positive test can be found by multiplying the probability that the person is a carrier by the probability that the test is positive given the person is a carrier, then adding the probability that the person is not a carrier times the probability that the test is positive given the person is not a carrier.
In symbols, P(positive) = P(carrier)P(positive|carrier) + P(not carrier)P(positive|not carrier)P(positive)
= (0.05)(0.90) + (0.95)(0.05)P(positive)
= 0.075 + 0.0475P(positive)
= 0.1225 or 0.123 (rounded to three decimal places)
≈0.15
(b) If the test is positive, The probability that the selected individual is a carrier given that the test is positive is found using Bayes' theorem:
P(carrier|positive) = P(carrier and positive)P(positive)
P(carrier and positive) = P(carrier)P(positive|carrier)
= (0.05)(0.90)
P(positive)= 0.075 + 0.0475
= 0.1225
P(carrier and positive) = (0.05)(0.90)(0.1225)
= 0.0055125
P(carrier|positive) = 0.00551250.1225
P(carrier|positive) = 0.45 or 0.692 (rounded to three decimal places) or approximately 0.7, to the nearest tenth.
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Sea cucumbers are small animals that crawl along the ocean floor. How would you group them and why?
Answers
Sea cucumbers are classified as echinoderms, which means they belong to the same group as starfish, sea urchins, and sand dollars.
Echinoderms are characterized by their pentaradial symmetry, meaning they have five radial sections that are identical in size and shape. Sea cucumbers also have a water vascular system, which they use for movement and feeding. Within the echinoderm group, sea cucumbers belong to the class Holothuroidea. This class is characterized by its elongated body shape and soft, leathery skin. Sea cucumbers have a unique defense mechanism where they can eviscerate their internal organs to deter predators. They can then regenerate these organs over time. Sea cucumbers also play an important role in marine ecosystems. They are detritivores, meaning they feed on dead organic matter, and help to recycle nutrients back into the food chain. Additionally, their presence on the ocean floor helps to aerate and mix sediments, which is important for maintaining healthy marine habitats. In summary, sea cucumbers are classified as echinoderms within the class Holothuroidea. They have unique characteristics such as their evisceration defense mechanism and detritivorous feeding habits, and play an important role in maintaining healthy marine ecosystems.
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How many atoms are in 312 g of oxygen
Answers
Answer
1.10 X 10^24
Explanation:
with reference to enzymes, what does "denatured" mean?
Answers
Answer:
Enzymes work consistently until they are dissolved, or become denatured. When enzymes denature, they are no longer active and cannot function. Extreme temperature and the wrong levels of pH -- a measure of a substance's acidity or alkalinity -- can cause enzymes to become denatured.
Crop rotation is a planned order of specific crops planted on the same field. Crop rotation means that succeeding crops are of adifferent genus and species. Examples are row crops planted after small grains or grain crops after legumes. The planned rotationmay be for a two- or three-year period.What is a LIKELY ecological impact of crop rotation?A) The main crop becomes resistant to pests.B) It can interrupt the life cycles of certain pests.C) Lesser amounts of nitrogen are needed in the soilD) It ensures the presence of a single type of nutrient in the soilPlease select the correct answer choice.
Answers
A likely ecological impact of crop rotation is that it ensures the presence of a single type of nutrient in the soil. (option D)
Haemophilia is a genetic condition that impairs people's ability to form blood clots. Some forms of it are known to be sex-linked. Suppose that equal proportions of people are men and women, ignoring further gender variance. One meta-study estimates that 2-in-10,000 men and 1-in-100,000 women have a particular sex-linked form of haemophilia. (a) What is the probability that a randomly chosen person has haemophilia? (b) What is the probability that a given person with haemophilia is a man?
Answers
(a) The probability of a randomly chosen person having hemophilia is 0.000105.
(b) The probability that a given person with hemophilia is male is approximately 1.9.
(a) Probability that a randomly chosen person has hemophilia:
Haemophilia can affect both males and females, but we need to find the probability for both. Hence,
the probability of having hemophilia = probability that a randomly chosen person is male × probability that a male has hemophilia + probability that a randomly chosen person is female × probability that a female has hemophilia
Probability of having hemophilia in males = 2/10,000 = 0.0002
Probability of having hemophilia in females = 1/100,000 = 0.00001
Probability of a randomly chosen person is male = 0.5
Probability of a randomly chosen person is female = 0.5
Probability of having hemophilia = 0.5 × 0.0002 + 0.5 × 0.00001 = 0.000105
(b) Probability that a given person with haemophilia is a man:
From (a), we know that the probability of having hemophilia is 0.000105. Therefore, the probability that a given person with hemophilia is male is:
probability that a given person with haemophilia is a man = probability that a male has hemophilia/ probability of having hemophilia = 0.0002/0.000105 = 1.9048≈1.9 (approximately).
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FUN FACT:
the Swine flu was a strand of Coronavirus
Answers
Answer: I have a fun fact. Wombats poop squares :)
Explanation:
If the DNA sequence is TGC ACG TAC, then the mRNA sequence is:
A.) ACG UGC AUG.
B.) ACG TGC ATG.
C.) AGC UCG AUC.
D.) AGC AGC ATG.
Answers
Answer:
A.) ACG UGC AUG. The answer is A
Explanation:
What does a blade of grass look like under a microscope?.
Answers
Not sure if you just wanted a diagram or smthn, sorry if this isn’t what you were looking for.
Blood types: The blood type O negative is calied the "universal donor" type, because it is the only biood type that may safely be transfused into any person. Therefore, when someone needs a transfusion in an emergency and their blood type cannot be determined, they are given type o negative blood. For this reason, donors with this bloed type are crucial to blood banks. Unfortunately, this blood type is fairly rare; according to the Red Cross, onily 7 if or U.S. residents have type 0 negative blood. Assume that a blood bank has recruited 24 donors. Part 1 of 2 (a) What is the mean number of donors who have type 0 negative blood? Round the answer to two decimal places. The mean number of donors who have type O negative blood is Part 2 of: 2 (b) What is the standard deviation of the number of donors who have fype o negative blood? Round the answer to four decinal places: The standard deviatien of the number of donoes who Nave type o negative blood is
Answers
(a) Mean number of donors who have type O negative blood Mean of a population (μ) is found by adding up all the values and dividing by the number of values. So, the formula for calculating the mean of a population is:
mu=1Nsum_i=1^N x_where mu is the population mean, N is the number of values in the population, x_i is the ith value in the population.Using the given data in the question, we can compute the mean of donors who have type O negative blood:mu=24cdot 0.07 1 =1.68 Hence, the mean number of donors who have type O negative blood is 1.68. (rounded to two decimal places)(b) Standard deviation of the number of donors who have type O negative blood:Standard deviation is a measure of how much the data in a set is spread out. It is given by the formula:
sigma=i=1^N(x_i-mu)^2 Nwhere sigma is the standard deviation, mu is the mean, x_i is the ith value in the set, and N is the number of values in the set.Using the given data in the question, we can compute the standard deviation of donors who have type O negative blood:sigma=24 cdot 0.07 cdot (1-0.07)) 1=0.4652 Hence, the standard deviation of the number of donors who have type O negative blood is 0.4652. (rounded to four decimal places)About O Negative bloodO negative blood is the type most commonly used for transfusions when the patient's blood type is unknown. The O negative group is most often used in emergency cases, trauma, surgery, because this type is universal. However, O negative blood group can only receive O negative blood. O blood group is divided into two types Blood type O that has the rhesus antigen is called blood type O positive. Blood type O that does not have the rhesus antigen is called blood type O negative.
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7. What might humans do to INCREASE the amount of nitrogen entering rivers and oceans?
or rivers
Answers
Answer:
Burning fossil fuels, application of nitrogen-based fertilizers, and other activities can dramatically increase the amount of biologically available nitrogen in an ecosystem. ... Much of the nitrogen applied to agricultural and urban areas ultimately enters rivers and nearshore coastal systems.
Explanation:
i hope it's help
Calculate the ratio of the size of the bacterial cell to the size of the mesophyll cell
bacterial cell is 1 micrometer
mesophyll cell is 0.05mm
Answers
Answer:20 to 1
Explanation:
]
The ratio of the size of the bacterial cell to the size of the mesophyll cell is 1:20. It means that 20 bacterial cells can fits into a mesophyll cell.
Given here,
Size of the bacterial cell = 1 micrometer
Size of the mesophyll cel= 0.05mm
Equalize the measuring unit,
1 micrometer = \(\bold{10^-^6 m}\)
1 millimetre = \(\bold { 10^-^3 m}\)
So the ratio will be
\(\bold { = \dfrac{ 1 x10^-^6 m}{0.05 x 10^-^3 m} }\\\\\bold { = \dfrac 1{20} }\)
Therefore, the ratio of the size of the bacterial cell to the size of the mesophyll cell is 1:20.
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what property of oric in e. coli allows the double-stranded dna to be more easily separated than the rest of the genome?
Answers
The property of ORI (Origin of Replication) in E. coli that allows the double-stranded DNA to be more easily separated than the rest of the genome is its AT-richness.
The DNA sequence known as ORI serves as the starting point for DNA replication. In comparison to other parts of the genome, the ORI sequence in E. coli is relatively AT-rich, meaning it has a higher percentage of adenine and thymine nucleotides.
Because of this AT-richness, DNA strands can unwind more readily, which makes them more vulnerable to enzymes that split the strands.
Because the DNA strands are simpler to separate and the replication machinery can access the template strands more quickly because to this characteristic, replication can proceed more swiftly.
Additionally, because the ORI sequence is only present in one place in the genome, its AT-richness contributes to ensuring that replication starts at the appropriate place.
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What type of ecological internal interactions exist between the hawk in the mole
Answers
Answer:predation
Explanation:
Answer: CORRECT (SELECTED)
Predation
Explanation:
The hawk (predator) consumes the mole (prey).
Many population types increase exponentially until a catalyst changes this. Unbeknownst to her, Henrietta Lacks' cancer cells have been used since her death in 1951 for all sorts of remarkable discoveries, her cells do not die. they double every 24 hours. suppose I order 6 hela cells. how many hela cells would I have in 5 days and in 20 days? use the formula: C(x)=6*2^t where t=times in days.
Answers
There would be 192 Hela cells after 5 days and 6,291,456 Hela cells after 20 days.
Henrietta Lacks' cancer cells, which are known as HeLa cells, are a population that multiplies exponentially until a catalyst changes it. Her cells have been used in a variety of fascinating findings since her death in 1951, and they are not perishable.
The formula to calculate the number of Hela cells after a given time in days is given by C(x)=6*2^t, where t represents the time in days, C(x) is the number of Hela cells produced in x days.
Let us calculate the number of Hela cells after 5 days and 20 days.
We have been given that the number of Hela cells is 6.
So, let's plug in the value of t and calculate the number of Hela cells produced after 5 days and 20 days.
Calculating the number of Hela cells produced after 5 days:
t = 5C(x)
= 6 * 2^5
= 6 * 32
= 192 Hela cells.
Calculating the number of Hela cells produced after 20 days:
t = 20C(x)
= 6 * 2^20
= 6 * 1048576
= 6,291,456 Hela cells.
Answer:
So, there would be 192 Hela cells after 5 days and 6,291,456 Hela cells after 20 days.
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Select the reasons that farmers typically only specialize in one breed.
lack of training
homogeneous housing
business efficiency
time demands
standardized food supplies
personal preference
familiarity with the breed
Answers
Answer: business efficiency personal preference
familiarity with the breed
Explanation:
i think so...
If a rock (assume it's appropriate for radiometric dating) has 12.5% parent atoms, and 87.5% stable daughter atoms, and the isotope has a half-life of 200 million years, how old is the rock? A) 200 million years old B) 800 million years old C) 600 million years old D) 400 million years old
Answers
If a rock (assuming it's appropriate for radiometric dating) has 12.5% parent atoms, and 87.5% stable daughter atoms, and the isotope has a half-life of 200 million years, the rock is 200 million years old. The correct option is A.
To determine the age of the rock, we can use the concept of radioactive decay and the ratio of parent atoms to stable daughter atoms.
The half-life of an isotope is the time it takes for half of the parent atoms to decay into stable daughter atoms. In this case, the isotope has a half-life of 200 million years.
Since the rock currently has 12.5% parent atoms and 87.5% stable daughter atoms, it means that half of the original parent atoms have decayed. Therefore, the rock has undergone one half-life.
To find the age of the rock, we need to multiply the half-life by the number of half-lives it has gone through. Since the rock has undergone one half-life, the age of the rock is:
Age = 1 * 200 million years = 200 million years.
Therefore, the rock is 200 million years old.
The correct option is A) 200 million years old.
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which molecules are inputs in cellular respiration
Answers
What are the four stages of citric acid cycle?
Answers
The four stages of citric acid cycle include;
The citric acid cycle begins when Coenzyme A transfers its 2-carbon acetyl group to the 4-carbon compound oxaloacetate to form the 6-carbon molecule citrate The citrate is rearranged to form an isomeric formThe 6-carbon isocitrate is oxidized and a molecule of carbon dioxide is removed producing the 5-carbon molecule alpha-ketoglutarateAlpha-ketoglutarate is oxidized, carbon dioxide is removed, and coenzyme A is added to form the 4-carbon compound succinyl-CoAWhat is the citric acid cycle?The citric acid cycle also known as the Krebs cycle is described as a series of chemical reactions to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins.
In conclusion, the citric acid cycle functions as the mitochondrial hub for the final steps in carbon skeleton oxidative catabolism for carbohydrates.
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In an ATP molecule, energy used by the cell is stored in:
A. The adenosine molecule
B. A bond between phosphate groups
C. Both A and B
D. None of the above
Answers
Answer:
B. A bond between phosphate groups
Explanation:
In an ATP molecule, energy used by the cell is stored in a bond between phosphate groups.
can someone help me please and if you do can you write a paragraph about it
Describe the size, color and brightness variations in stars. Explain why there are these differences!
Answers
Answer:
....
Explanation:
What are the ingredients for life? (choose all that apply)
Group of answer choices
Carbon
Water
Lead
Nitrogen
Salt (minerals)
Phosphorus
Calcium
Silicon
Which of the following is NOT one of the 4 elements that make up 97% of life?
Group of answer choices
Hydrogen
Oxygen
Phosphorus
Nitrogen
Carbon
True or False: We do not know of a life form that doesn't use carbon or contain carbon.
True or False: Everything that contains carbon is alive.
Group of answer choices
True
False
Answers
Answer:
1. Carbon, water, nitrogen, phosphorus
2. phosphorus
3. true
4. false, there are many non-living things made of carbon, like your clothes and furniture.
You add a fluorescent antibody to a cell surface protein to a dish of cells. Looking at an individual cell under the microscope the entire surface of the cell is fluorescent. You then hit the cell with a brief pulse from a laser which bleaches out part of the fluorescence on the cell. Over time you notice that the entire surface of the cell becomes fluorescent again. What is the best explanation for this observation?.
Answers
Answer: Proteins from parts of the cell membrane that were not bleached with the laser diffuse into regions of the membrane that were bleached.
Explanation:
a. Solid at room temperature are called "
Answers
Answer:Those molecules that are usually solid at room temperature (plant or animal) are termed fats, while those that are liquids at room temperature are termed oils.
Explanation: explained in answer
Solid at room temperature are called fats.
What are fats?Fats are organic compounds. They are esters of fatty acids. These compounds are solid at room temperature. Fat is an essential component that makes the cell structure and gives strength to cells. Some examples of fats are coconut oil and olive oil.
Fats are present in many food substances little amount of fat is necessary for the body but law the amount of fat accumulates under the skin layers of the body, and increases the weight of the body.
It might be unhealthy to consume too much fat or the incorrect kind of fat. Butter, oil, nuts, meat, fish, and various dairy products are a few examples of foods that include fats. The types of fats are mono-saturated.
Thus, fats are solid at room temperature.
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