________ split from a common hominoid ancestor.Humans and chimpanzeesHumans and chimpanzeesGreater apes and lesser apesGreater apes and lesser apesPrimates and mammals

Answer:

The characteristic of daphnia which allows the population to adapt to the environmental change is the short generation time.

Explanation:

As evident from the text, the maturity comes in 5 to 10 days and they reproduce for the next 2 months at a rate of 100 eggs every 3/4 days. This is a short generation time which makes the evolutionary changes easy and less time-consuming to incorporate.

The distributions of the random variables in the given scenarios are (a) binomial for the water lizards and (b) Poisson for the health center visits. The probabilities can be calculated using the respective formulas for the corresponding distributions.

(a) The distribution of the random variable X, which counts the number of water lizards out of the 25 selected with webbed feet, follows a binomial distribution.

This is because each lizard can be considered as a Bernoulli trial (success: possessing webbed feet, failure: not possessing webbed feet) with a probability of success (p) equal to 61% or 0.61, and the trials are independent.

(b) To compute the probability that exactly 17 of the 25 selected water lizards have webbed feet, we can use the binomial probability formula.

The probability mass function (PMF) for the binomial distribution is given by P(X = k) = C(n, k) * p^k * (1-p)^(n-k), where C(n, k) represents the number of combinations of n items taken k at a time. Plugging in the values, we have P(X = 17) = C(25, 17) * 0.61^17 * (1-0.61)^(25-17).

(c) To compute the probability that at least 17 of the 25 selected water lizards have webbed feet, we need to calculate the cumulative probability from 17 to 25. This can be done by summing up the probabilities for each value of X from 17 to 25: P(X ≥ 17) = P(X = 17) + P(X = 18) + ... + P(X = 25).

(d) The mean (μ) and standard deviation (σ) for the number of water lizards out of 25 who have webbed feet can be calculated using the formulas for the binomial distribution.

The mean is given by μ = n * p, where n is the number of trials (25) and p is the probability of success (0.61). The standard deviation is given by σ = sqrt(n * p * (1-p)).

Moving on to the second scenario:

(a) The distribution of the random variable X, which counts the number of patients that visit the health center during a randomly selected week, follows a Poisson distribution.

This is because the number of patients per week can be modeled as a Poisson process, where events (patient visits) occur independently and at a constant average rate (300 patients per week).

(b) To compute the probability that exactly 310 patients visit the health center during a randomly selected week, we can use the Poisson probability formula.

The probability mass function (PMF) for the Poisson distribution is given by P(X = k) = (e^(-λ) * λ^k) / k!, where λ is the average rate of the Poisson process (300 patients per week) and k is the number of events we are interested in (310 patients).

(c) To compute the probability that more than 280 patients visit the health center during a randomly selected week, we need to calculate the cumulative probability from 280 to infinity. This can be done by summing up the probabilities for each value of X from 280 to infinity: P(X > 280) = P(X = 281) + P(X = 282) + ... + P(X = ∞).

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Answer:

its c.

Explanation:

hope this helps

One can detect if the cell is in metaphase I or II as follows:

If there is homologous chromosomes (metaphase I) or duplicated chromosomes/sister chromatids (metaphase II) in the middle of the cell.

Therefore, according to this question, one would know if the cartoon is in metaphase I or II if:

- there are homologous chromosomes in the middle of the cell (metaphase I)

- there are sister chromatids in the middle of the cell (metaphase II).

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Answer:

Explanation:True white noise is a mixture of all the frequencies humans can hear, from about 20 Hz to 20,000 Hz, all going at equal strength at the same time.

Answer:

white noise

Explanation:

The conversion of 8 H₂O molecules to 2 H₂O molecules is a chemical change that occurs through a dehydration or condensation reaction. This process involves the removal of water molecules to form a larger molecule and requires energy to occur.

This is a reaction that occurs between two molecules, and results in the formation of a single, larger molecule, while releasing a small molecule, usually water. In this case, the small molecule is water (H₂O), hence the name dehydration or condensation reaction.
During this reaction, the 8 H₂O molecules combine to form 4 H₂O molecules. This reaction is often used in the laboratory to create polymers from monomers. It can also be used to produce certain biomolecules such as carbohydrates, proteins, and nucleic acids, as well as other chemical compounds.
In order to carry out this reaction, energy is required. The reaction occurs in several steps and involves the removal of water molecules from the original 8 H₂O molecules, forming a new, larger molecule. The reaction is reversible, which means that it can be carried out in both directions, depending on the conditions and reactants involved. Thus, the conversion of 8 H₂O molecules to 2 H₂O molecules is a chemical change that can occur through a process known as dehydration or condensation reaction.

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The four functions of lipopolysaccharide (LPS) are: Stabilize the outer membrane, Protect from environmental toxins, Contribute to the negative charge of the cell, and Make a permeability layer. Option A, B, D and E are correct.

Stabilize the outer membrane: LPS is a major component of the outer membrane of Gram-negative bacteria and helps to stabilize the membrane structure.

Protect from environmental toxins (and immunological factors): LPS can act as a barrier to prevent harmful substances, such as antibiotics and host immune factors, from penetrating the bacterial cell.

Contribute to the negative charge of the cell: LPS is negatively charged, which helps to repel other negatively charged molecules and ions, such as detergents and bile salts.

Make a permeability layer: LPS forms a permeability layer that controls the movement of molecules across the outer membrane, allowing for the selective uptake of nutrients and exclusion of toxins.

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--The given question is incorrect, the correct question is

"which four of the following are functions of lipopolysaccharide? A) Stabilize the outer membrane B) Protect from environmental toxins (and immunological factors) C) Provide energy for flagellar rotation D) Contribute to the negative charge of the cell E) Make a permeability layer F) Maintain cell shape as a structural support."--

Answer:

1. Aorta

2. Pulmonary Artery (left)

3. Pulmonary Veins (left)

4. Left Atrium

5. Bicuspid Valve

6. Aortic Semi-Lunar Valve (one of the av valves)

7. Left Ventricle

8. Right Ventricle

9. Tricuspid Valve (one of the av valves)

10. Right Atrium

11. Pulmonary Semi-Lunar Valve

12. Superior Vena Cava

Explanation: is correct

The elevated PCB levels in the Last Frontier region may be attributed to a clandestine illegal dumping operation, where an unidentified entity has been disposing of PCB waste covertly. To test the hypothesis of an illegal dumping operation causing the observed increase in PCB levels, Conduct thorough sampling, identify potential dumping sites, investigate local industries, conduct stakeouts, trace the source, and take legal action and prevention measures.

The observation described above, which is detailed in the "PCB in the Last Frontier: A Case Study on the Scientific Method" file, can be explained by the presence of a clandestine illegal dumping operation in the Last Frontier region. This explanatory story suggests that an unidentified entity has been secretly disposing of PCB (polychlorinated biphenyl) waste in the area, leading to the elevated levels of PCBs detected in the environment.

1. Conduct thorough sampling: Collect samples from various locations in the Last Frontier region, including soil, water, and air samples, to quantify and compare the PCB levels. This will help establish a baseline for normal PCB concentrations in the area.

2. Identify potential dumping sites: Analyze the collected samples to identify hotspots of PCB contamination. Use geospatial mapping techniques and data analysis to identify areas with significantly higher PCB concentrations.

3. Investigate local industries: Examine nearby industrial facilities, waste disposal sites, and manufacturing plants to determine if any of them are involved in handling or producing PCBs. Gather information on their waste management practices and compliance with regulations.

4. Stakeout and surveillance: Set up surveillance equipment and conduct stakeouts in suspected areas to catch any illegal dumping activities in action. This may involve coordinating with law enforcement agencies and environmental protection organizations.

5. Trace the source: Analyze the collected PCB samples to determine the specific composition and characteristics of the PCBs. This information can help trace the origin of the PCBs and potentially identify the responsible party.

6. Legal action and prevention: If evidence of illegal dumping is discovered, report the findings to the appropriate authorities for legal action. Additionally, recommend stricter regulations, increased monitoring, and public awareness campaigns to prevent further illegal dumping incidents.

By following these steps, it is possible to investigate and test the hypothesis of an illegal dumping operation, ultimately providing evidence to support or refute the explanatory story behind the observed increase in PCB levels in the Last Frontier region.

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Answer: 2,000

Explanation:

Answer:

Scientists used the scientific method of investigation to test this phenomenon. The scientific method consists of these steps:

Make observations: Scientists observed that nerve damage causes severe pain. Scientists knew bone marrow cells seemed to decrease nerve pain, but the reason was unknown.

Ask questions and construct the hypothesis: Would injecting bone marrow cells into the spinal cord decrease pain?

Test the hypothesis: Injected bone marrow cells into the spinal cord of mice that had nerve damage. Observed changes in the cells, and monitored the pain levels in the mice.

Analyze the results and make a conclusion: Determined that the pain decreased because the bone marrow cells released a pain-relieving protein that helps damaged cells.

Test and modify: Make a plan to repeat the test in humans.

Explanation:

The abdominal organ that filters erythrocytes and activates lymphocytes is: (b) spleen.

Lymphocytes are the white blood cells that are the part of our immune system. The lymphocytes generally have  a large nucleus and are agranular. There are three types of lymphocytes: B cells, T cell and NK cells.  All these together constitute 20-40% of all the white blood cells.

Spleen is the secondary lymphoid organ. It is the size of a fist, present on the upper left side of the abdomen. The function of spleen is to regulate the blood cell levels and also it removes the old, damaged and dead blood cells.

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Tropical Rain Forest is the biome that include ferns, large woody vines, monkeys, sloths, and boa constrictors.

Tropical rainforests are the rainforests that occur in the regions of tropical rainforest climate where there is no dry season. Due to such type of climate, there is greater amount of biodiversity.

So we can conclude that Tropical Rain Forest is the biome that include ferns, large woody vines, monkeys, sloths, and boa constrictors.

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Answer:

d. The dermis is usually thicker than the epidermis

Skin is the body's outer covering that protects against light, heat injury, and infection. It is composed of two main layers namely the epidermis and the dermis.  The dermis is usually thicker than the epidermis. Thus the correct option is D.

The main function of the skin is to regulate body temperature and stores fat, water, and vitamin D. The skin, that weighs about 6 pounds, is the body's largest organ.

The epidermis is the thin outer layer of the skin and composed of 3 types of cells.

Squamous cells: the outermost layer is progressively shed is known as the stratum corneum.

Basal cell:. these cells are present just under the squamous cells, at the base of the epidermis.

Melanocytes. these cells are also present at the base of the epidermis and form melanin. This gives the skin its color.

The dermis is thick layer and held together by a protein called collagen. Dermis gives skin flexibility and strength.

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Answer:

atria

Solution

the atria i believe is the upper chambers of the heart..

The five reasons why people become drug abuser are

Drug abuser is the ability of some one to use overdose of drugs. it is a process where someone dies not follow prescription of drugs but uses overdoses to derive one satisfaction or the other.

Therefore, The five reasons why people become drug abuser are

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Exaptation may be defined as a characteristic that is present in an organism or set of organisms that develops a new function or role that differs from its original function as a result of the process of evolution such as the role of feathers in birds.

For instance, the malleus and incus, two novel bones in the middle ear of mammals, are analogous to the quadrate and articular bones. The primary jaw joint's incorporation with the mammalian middle ear required the emergence of a novel technique of upper and lower jaw articulation. Thus, the two elements came together to create the distinctive mammalian cranium.

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The liquid methane's phase change could have been brought on by an increase or decrease in energy.

The liquid methane could have changed phases due to an increase or decrease in energy. 

The molecules' kinetic energy and perhaps even their freedom of movement would have grown if the energy had increased. The molecules' kinetic energy and perhaps their freedom of motion would have diminished if the energy level dropped. Since the lake vanished during Titan's summer, when more energy was being transmitted into it than at other times, the lake must have evaporated rather than frozen. molecules of the liquid

Each other was shifted around. The molecules of the lake might now travel independently of one another if it evaporated.

The molecules in the lake would only be able to move in place if it froze. During a phase change, neither the quantity nor the size of molecules changes.

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It's possible that a rise or fall in energy caused the liquid methane to shift phases. The length of time it typically takes for a molecular to be expelled from the environment is known as residence time.

Unscented, colorless, and combustible, methane is a gas. It is mostly used as fuel to produce heat and light. It is also employed in the production of organic compounds. Methane is frequently found in garbage, marshes, septic tanks, and sewers and can be produced as natural materials decompose.

According to thermodynamic, superheated liquids may sustain explosions similar to those found in chemical explosives. At 1 atmosphere, liquid methane was heated to a temperature 50 K well beyond its boiling point.

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The hypothalamus, a reflection of the dura mater, covers the superior surface of the gland. The infundibulum can flow via a central gap in this membrane.

The gland is important anatomically in numerous ways: Sphenoid sinus located anteriorly (the pituitary gland is accessed surgically via the sphenoid sinus, known as a trans-sphenoidal approach). The pons, basilar artery, dorsum sellae (the posterior wall of the sella turcica), and posterior intercavernous sinus. diaphragm sellae, a fold of the dura mater that protects the pituitary gland, and optic chiasm are located superiorly. Sphenoid sinus is located below. Cavernous sinus is located laterally.

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Answer:

B

Explanation:

Both traits on the left are dominant meaning the offspring would take on that trait no matter what.

Answer:

I disagree there are definetly more things that can up a country's GDP than killing off animals that are helpless and important to life itself there is no need be continously killing trees and destroying habitats. You can start more businesses or even try to find another source of GDP. But the simple truth is that it is wrong and unnessecary

Explanation:

brainiest plz

Answer:

On January 22, 2001, EPA adopted a new standard for arsenic in drinking water of 0.01 mg/l or 10 parts per billion (ppb), replacing the old standard of 50 ppb. Water systems had to meet the new standard by January 23, 2006.

Explanation:

Answer:

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators.

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators."raw water" quality – characteristics of a water source prior to treatment for domestic consumption (drinking water). See Bacteriological water analysis and specific tests such as turbidity and hard water.

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators."raw water" quality – characteristics of a water source prior to treatment for domestic consumption (drinking water). See Bacteriological water analysis and specific tests such as turbidity and hard water."finished" water quality – water treated at a municipal water purification plant. See Bacteriological water analysis and Category:Water quality indicators.

Answer:Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety.Testing may be performed to evaluate:ambient or environmental water quality – the ability of a surface water body to support aquatic life as an ecosystem. See Environmental monitoring, Freshwater environmental quality parameters and Bioindicator.wastewater – characteristics of polluted water (domestic sewage or industrial waste) before treatment or after treatment. See Environmental chemistry and Wastewater quality indicators."raw water" quality – characteristics of a water source prior to treatment for domestic consumption (drinking water). See Bacteriological water analysis and specific tests such as turbidity and hard water."finished" water quality – water treated at a municipal water purification plant. See Bacteriological water analysis and Category:Water quality indicators.suitability of water for industrial uses such as laboratory, manufacturing or equipment cooling.

Answer:

c. sugar, ATP

Explanation:

C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP

basically glucose and oxygen undergo a combustion reaction among other things which will go on to produce ATP. So oxygen plus glucose or sugar produces when "burned" within a mitochondria = ATP.

To separate a tagged protein from crude cell extract, affinity chromatography is the most suitable type of column chromatography.

This is because affinity chromatography takes advantage of the strong and specific binding between a protein of interest and its ligand, which is covalently attached to a solid support matrix. In this case, the tagged protein would be bound to the ligand that is immobilized on the matrix, while all other proteins would flow through the column. The tagged protein can then be eluted by washing the column with a high concentration of a competing ligand, such as the free tag that was used to label the protein. Affinity chromatography is highly specific, and efficient, and can yield high purity of the tagged protein, making it the method of choice for isolating proteins from complex mixtures.

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The World Skin Cancer Map shows that Australia has much higher skin cancer rates than Brazil. In Australia, an estimated 5.4 out of 100 people will develop melanoma in their lifetime, compared to 0.4 out of 100 in Brazil.

What is Skin Cancer?

Skin cancer is a type of cancer that affects the skin cells. It is caused by over-exposure to ultraviolet (UV) radiation from the sun and sun beds. It is the most common type of cancer in the United States, and can affect anyone, regardless of age, gender, or skin color. It is very important to protect your skin from the sun by using sunscreen.

Australia also has higher rates of non-melanoma skin cancer, with estimated rates of 24.3 out of 100 people in Australia, compared to 5.3 out of 100 people in Brazil.

Answer: The nervous system has two main parts:

The central nervous system is made up of the brain and spinal cord.

The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

Explanation:

The correct chronological order is: Protists -> Fungi -> Plants.

The correct chronological order of organisms, developing from oldest to youngest (more recent), is as follows:

Protists: Protists, which are diverse eukaryotic microorganisms, evolved first. They appeared around 2 billion years ago.

Fungi: Fungi, including molds, yeasts, and mushrooms, evolved after protists. They appeared around 1 billion years ago.

Plants: Plants, including non-vascular plants (such as mosses) and vascular plants (such as ferns, gymnosperms, and angiosperms), evolved after fungi. They appeared around 500 million years ago.

Therefore, the correct chronological order is:

Protists -> Fungi -> Plants.

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Full Question: which is the correct chronological order of organisms, developing from oldest to youngest (more recent)? mcq