According, to darwin, natural selection is based on the _______ found in populations.

Answers

Answer 1

According to Darwin, natural selection is based on the variations or genetic diversity found in populations.

Charles Darwin was an English naturalist and biologist who is best known for his contributions to the theory of evolution. He was born on February 12, 1809, in Shrewsbury, England, and died on April 19, 1882, in Downe, Kent, England.

Darwin's most famous work is his book "On the Origin of Species," published in 1859. In this book, he presented the theory of evolution by natural selection, which proposed that all species of organisms arise and develop through the process of natural selection acting on heritable traits. This groundbreaking theory revolutionized the understanding of the natural world and had profound implications for biology, geology, and other scientific disciplines.

During his lifetime, Darwin conducted extensive research and made observations on various expeditions, most notably his voyage on the HMS Beagle from 1831 to 1836. This voyage took him to various parts of the world, including the Galapagos Islands, where he studied the unique fauna and flora. These observations played a crucial role in shaping his ideas about evolution.

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Related Questions

When you hold the frequency on the stimulator constant at 1 pulse per second, what is the frequency of AP you generate in the sciatic nerve? (how many APs are generate in neurons found in sciatic?) 10/sec 1/sec 100/sec

Answers

When holding the frequency on the stimulator constant at 1 pulse per second, the frequency of action potentials generated in the neurons found in the sciatic nerve would be 1 per second. Option b is correct.

The frequency of action potentials generated in neurons is determined by the frequency of the stimulus or input received by the neurons. In this case, when the frequency on the stimulator is set to 1 pulse per second, it means that the neurons in the sciatic nerve will receive one stimulus per second. This results in the generation of one action potential per second in those neurons.

Action potentials, also known as nerve impulses, are the electrical signals generated by neurons to communicate and transmit information throughout the nervous system. The frequency of action potentials reflects the rate at which neurons are firing. Higher frequencies indicate a higher rate of firing, while lower frequencies indicate a lower rate of firing. In this scenario, with a stimulus frequency of 1 pulse per second, the neurons in the sciatic nerve would generate one action potential per second, resulting in a frequency of 1/sec.

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25 POINTSSSS!!!!!
In which system of plant do the tissues xylem and phloem work?

Answers

In vascular system of plant do the tissues xylem and phloem work

Xylem cells are non-living cells that are part of a plant's vascular or conducting tissue. Xylem transports water from the roots upward through the plant, along with nutrients. Xylem is found in vascular bundles, that can be arranged in a circular fashion or a scattered fashion in woody and non-woody parts of plants with wood. The veins found in leaves, stems and roots which are interconnected contain xylem. Phloem, also part of the vascular tissue, conducts nutrients to parts of the plant where needed, particularly sugar produced by photosynthesis. Phloem cells are living and transport sap from the leaves, to roots or to storage areas in a plant such as a bulb. Phloem sap moves from sugar sources to sugar sinks due to turgor pressure gradient. CCredit: Enotes.com internet source!

What is the ICD-10 code for cystitis?

Answers

Answer:

N30 .90

Explanation:

ICD-10 code N30. 90 for Cystitis, unspecified without hematuria is a medical classification as listed by WHO under the range - Diseases of the genitourinary system .

ASAP Summarize the lytic cycle.(1 point)
Responses


A virus copies its genetic material and then splits its cell membranes in half to form identical viruses.

A virus injects its genetic material into the host cell, copies itself, and then forms new viruses that burst out of the host cell.


A virus lays eggs on the host cell’s protein coat, which then hatch and move on to infect other cells.


The viral DNA incorporates itself with the host cell and replicates whenever the host cell replicates itself.

Answers

Answer:

A virus injects its genetic material into the host cell, copies itself, and then forms new viruses that burst out of the host cell.

Explanation:

There are two cycles of viral replication.

1. Lytic

2. Lysogenic

The lytic cycle involves the destruction of the cell to release viral particles.

The lysogenic cycle incorporates the DNA into the host's genome and the DNA is replicated when the cell replicates. This cycle can turn into the lytic cycle in a process called induction.

What type of membrane is simple columnar epithelium?

Answers

Simple columnar epithelium is a type of membrane. It is a single layer of cells that are tall and column-shaped. The membrane is considered to be polarized and is found in various tissues of the human body such as the intestines, respiratory passages, and uterus.

Simple columnar epithelium is a type of cell layer that is tall and column-shaped. It is found in tissues such as the intestines, uterus, and respiratory passages. This type of membrane is considered polarized as it has a top (apical) surface and a bottom (basal) surface.The main function of simple columnar epithelium is to absorb nutrients and other substances from the lumen of the intestine and other organs.

The polarized nature of the membrane allows for different functions to occur on the top and bottom surfaces of the cells. For example, on the top surface, there may be microvilli or cilia that increase surface area or allow for movement of particles while on the bottom surface, there may be basal lamina or extracellular matrix that provide support to the cells.

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1. What eyes are the most sensitive to light?
2. Why?
3. What is the rarest hair color?
4. Why?

Answers

Answer:

1. Lighter in Color

2. Less Melanin

3. Red

4. Recessive genetic trait = necessary for both parents to carry the gene, whether or not they themselves are redheaded

Explanation:

Hope this helps.

Answer:

Explanation:

1. Lighter colored eyes like blue, hazel and green

2. Lighter colored eyes like blue, hazel and green have less of a pigment called 'melanin' than brown eyes do. Melanin helps protect the retina from UV damage and blue light, putting those with blue eyes at a higher risk of developing UV-related eye damage.

3. Natural red hair

4. Natural red hair is the rarest hair color in the world, only occurring in 1 to 2% of the global population. Since red hair is a recessive genetic trait, it is necessary for both parents to carry the gene, whether or not they themselves are redheaded. Due to this there are more people who carry the redhead gene, than there are people with red hair.

Part 1
1. Four levels and six different groups of organisms are described in the popup Windows. What
kinds of behaviors and interactions among the organisms of this habitat can you observe in
the animated snapshot of the reef environment?
I

Answers

Answer:

Mutualism, commensalism and parasitism.

Explanation:

Interactions among the organisms such as fish, corals, lobsters, clams, seahorses, sponges, and sea turtles etc can be observe in  the reef environment. reef environment refers to the coral reef which are present in the underground ecosystem. It is made up of calcium carbonate that provides habitat or shelter to thousands of animals. Some behaviours are mutualism, commensalism and some are parasitism.

The reef depicts the interaction of various organisms such as crabs, lobsters and sponges. The reef environment is made up of corals. The reef is made on the deposits of calcium carbonate hence shelter bed for thousand of organisms

Some behaviors like the mutualism, commensalism, and parasitism can be found. The mutualism is based on the mutual harmony of these organisms with each other in the same environment. The parasitism depicts the dependence of the small organisms that feed and depend on the larger organisms for shelter and food.

Thus they depicts mutualism, parasitism, and commensalism in the environment.

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You are requested to implement a simple virus management system. " A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea." Viruses can be classified into various categories according to the Baltimore classification (see link for more details). Any virus can be identified by many fields including an official name, date when it was first discovered, who discovered, ... 1- (1 mark) Describe the virus and research Lab data types, Virus and ResearchLab, using Java classes. Make sure to use Java inheritance, an interface, and an abstract class. 2- (4 marks) We want to implement a simple application that manages the viruses stored in research Labs. You are asked to develop a Java application that uses an array to store all information regarding the viruses maintained in each research Lab and using the newly created data types: Virus and ResearchLab defined in 1). You should provide a menu with the following options: Virus Management System (CSC301, Fall2022) 1- Create a new Research Lab 2- Add a new Virus to a research Lab 3- List all research Labs storing a particular virus 4- Delete all existing viruses from a given a category in a research Lab 5- Check if a particular virus exists based on its official name 0- Quit Your choice? Please use the partial Java code provided with this assignment which prints the menu.

Answers

The virus data type can be implemented as a Java class with properties such as the official name, discovery date, and discoverer. The research lab data type can be implemented as a subclass of the virus class, inheriting its properties and methods.

To represent the virus data type in Java, we can create a Virus class that includes fields to store information such as the official name, discovery date, and discoverer. This class can serve as the base class for other virus-related classes.

For the research lab data type, we can create a ResearchLab class that extends the Virus class. This inheritance allows the ResearchLab class to inherit the properties and methods of the Virus class while also providing additional functionality specific to research labs.

Using Java inheritance, we can establish a hierarchical relationship where the ResearchLab class inherits the characteristics of the Virus class. This promotes code reuse and allows us to organize the codebase efficiently.

By implementing the virus and research lab data types using Java classes and inheritance, we can effectively represent and manage viruses and research labs in a structured manner within the virus management system.

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In a fasting urine sample,which of the following is considered an abnormal finding in the urine? Muttlple Choice Water Glucose Uree Soclum

Answers

Finding glucose in the urine is abnormal. Elevated levels of glucose in the urine, are known as glucosuria. Therefore, option B is correct.

Glucosuria refers to the presence of glucose in the urine. In normal conditions, glucose is reabsorbed by the kidneys and should not be present in significant amounts in the urine.

In cases of high blood glucose levels, such as in diabetes mellitus or other conditions affecting glucose regulation, the kidneys may not be able to reabsorb all the glucose, leading to its excretion in the urine. It can be an important diagnostic clue for diabetes mellitus.

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the expenditure of energy to produce heat in response to a cold environment and as a result of overfeeding is called multiple choice heat metabolism. thermic effect of cold. thermic metabolism. adaptive thermogenesis.

Answers

The expenditure of energy to produce heat in response to a cold environment and as a result of overfeeding is called adaptive thermogenesis.

Thermogenesis is generally defined as any metabolic process that releases heat occurs in specialized tissues including brown adipose tissue and skeletal muscle.

Thermoregulation is important for regulating the body temperature . In Daily life activities body maintains it temperature within the comfortable limits in response to change in temperature ,shelter, and climate. Hence, thermoregulation is only a very small part of daily energy expenditure.

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camouflage helps predators to survive by hiding them from what

Answers

Answer:

Organisms use camouflage to mask their location, identity, and movement. This allows prey to avoid predators, and for predators to sneak up on prey. ... The physical characteristics of the organism are important. Animals with fur rely on different camouflage tactics than those with feathers or scales, for instance.

Explanation:

Why do you think we see phases of the Moon?

Answers

Answer:

Just like the Earth, half of the Moon is lit by the Sun while the other half is in darkness. The phases we see result from the angle the Moon makes with the Sun as viewed from Earth. ... We only see the Moon because sunlight reflects back to us from its surface.

Explanation:

A male with the condition has four children with a female who is a carrier. What are the expected genotypic and phenotypic ratios of the offspring? Include a Punnett square to support your answer.

Answers

Genotypic ratio: 1:1 (Aa: aa): half affected and half carriers. phenotypic ratio: 1:1 (carrier: affected) - Carriers and affected individuals make up equal numbers.

What are the expected genotypic and phenotypic ratios of the offspring?

We ought to take into consideration the inheritance pattern of the condition as well as the genotypes of the guardians in arrange to expect the genotypic and phenotypic ratios of the sibling.

The male with the condition would have the genotype "aa," and the female with the condition would have the genotype "Aa," in the event that the condition could be a latent hereditary clutter.

We can cross the male genotype (aa) with the female genotype (Aa) using a Punnett square:

| A | a | ------------ A | aa | aa | ------------

From the Punnett square, we can observe the following:

chromosomal ratio:

The genotype "Aa" (carriers) is expected to be present in two out of four offspring, or fifty percent.

The genotype "aa" (affected by the condition) is expected to be present in two out of four offspring (50 percent).

phenotypic Ratio :

It is anticipated that two out of four offspring, or 50%, will be carriers (phenotypically unaffected).

2 out of 4 (half) posterity are supposed to be impacted by the condition.

As a result, the anticipated genotypic ratio is one-to-one (Aa: aa), and the anticipated ratio of phenotypes is also 1:1 (carrier: affected).

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Jack is adding oil to a generator being used for
temporary power on a new construction site.
Jack added 1.5 liters to the generator. How many
milliliters of oil did Jack add?
A. 150 milliliters
B. 1,000 milliliters
C. 1,500 milliliters
D. 1.5 milliliters

Answers

C. 1.500 milliters hope this helps

Migraines- the most noticeable difference between TTH, CGH, & migraines is the presence of what 5 clinical manifestations?

Answers

Migraines- the most noticeable difference between TTH, CGH, & migraines is the presence of aura, throbbing pain, unilateral pain, nausea and phobia.

It is possible to mistake a tension type headache or cervicogenic headache for a migraine. Aura also known as visual, sensory, or speech disturbances, are frequently present before or after migraine attacks. TTH or CGH do not frequently exhibit the throbbing pain that migraines are known for. While TTH and CGH typically cause pain on both sides of the head, migraines frequently only affect one side.

These clinical signs and symptoms are crucial for identifying migraines and setting them apart from other types of headaches. It's important to remember that not everyone who gets a migraine will experience all of these symptoms, and some people with TTH or CGH may also. A medical expert should make a correct diagnosis.

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The energy output of the Krebs cycle is
inal glucose molecule oxidized.
a. 3 ATP and 3 NADH
b. 1 ATP and 3 NADH
c. 3 NADH and 2 FADH,
d. 3 ATP, 3 NADH, and 3 FADH,
e. 2 ATP, 6 NADH, and 2 FADH,

Answers

Answer:

2ATP,6NADH AND 2FADH is the energy output of krebs cycle

The question is which ecosystem would be more likely to survive if a disease killed the grasses
Please help me I beg you

The question is which ecosystem would be more likely to survive if a disease killed the grasses Please

Answers

Answer:

I believe the answer is 3

Explanation:

is Organic Really Better? Healthy Food or Trendy Scam?

Answers

Answer:

It is better

Explanation:

It tastes better :)

And it has no pesticides

Answer:

♡ hi darling ♡

- Organic is great. Infact, I actually eat organic food for a living. Even the oreos are good, they taste better and it's better for you tbh. It helps you be more healthier but your still enjoying it because it's not like celery all day or something.

have a great day.

✧・゚: *✧・゚:・゚✧*:・゚✧・゚: *✧・゚:・゚✧*:・゚✧

Which one of the following is a domain?
A.Archaea
B.Bacteria
C.Eukarya
D.All of these

Answers

Answer:

D. All of these are domains. Archaea, Bacteria, and Eukarya are the three domains of life on Earth.

In order to safely bring the fossilized remains of a yeti down the side of a snowy mountain, they are strapped to a sled - the combination of which weighs 972 N - then carefully lowered down the 19.8∘ incline. To ensure the fossil is not damaged, it is brought down the snowy slope at a constant 1.92 m/s Although the runners of the sled are smooth, they are not free of friction; the coefficient of kinetic friction between the runners and the snow is 0.107. Assuming the rope is kept taut and parallel to the incline, what must be the tension (in newtons) in it

Answers

The tension in the rope is calculated as 33.7 N.

Weight of sled and fossil, w = 972 N Inclination angle of slope, θ = 19.8°

Speed of sled, v = 1.92 m/s

Coefficient of kinetic friction between sled runners and snow, μ = 0.107

To find:

Tension in the rope, T The forces acting on the sled are the gravitational force (Fg), the normal force (Fn) and the force of friction (Ff). The normal force is perpendicular to the slope and equal to the component of the gravitational force perpendicular to the slope. The force of friction is parallel to the slope and opposite the direction of motion.

The net force acting on the sled is given by the expression:

F net = ma

Since the sled moves with constant velocity, a = 0.

Therefore, F net = 0. F net = Fg sinθ - Ff = 0⇒ Fg sinθ = Ff

Since the speed of sled is constant, work done by tension in the rope is equal to work done by frictional force.

Hence, T = Ff = μFn

Where F n = Fg cosθ = w cosθ

Putting all the values,

T = μw cos θ sinθ= sin 19.8°cos 19.8°= 0.3365T = 0.107 × 972 × 0.3365T = 33.7 N

The rope is 33.7 N. The given problem is related to the tension in the rope. The tension in the rope is calculated as 33.7 N.

To bring down the fossil safely down the slope, the tension in the rope is 33.7 N. The gravitational force is acting perpendicular to the slope and the force of friction is acting parallel to the slope. The normal force is the component of gravitational force acting perpendicular to the slope. The sled moves down the slope with a constant velocity. The force acting on the sled is equal and opposite to the force of tension in the rope. The force of friction is given by the expression,

Ff = μFn,

where Fn = Fg cosθ = w cosθ.

Therefore, the tension in the rope is calculated as 33.7 N.

To bring down the fossil safely down the slope, the tension in the rope must be 33.7 N.

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in cows, the gene for the black color is incompletely dominant to the brown color. heterozygotes are roan color (mixed). a black cow is crossed with a brown, show probabilities of each genotype and phenotype.

Answers

The first generation of the offspring would all be Roan colored.That is the probability for getting roan colored cows is 100%.

in functional genomics, biologists use sequence information to identify the functions of various regions of genomes. which kinds of information could not be obtained from a genome sequence? rrna genes metabolite levels in cells genes encoding for transcription factors noncoding repetitive repeats amino acid sequences of proteins

Answers

Metabolite levels in cells. Genome sequencing involves determining the order of nucleotides in a genome. So, the correct answer is option B.

This sequence can reveal details about non-coding areas that might be involved in controlling gene expression, as well as information on the position and structure of genes.

In particular, the sequence can be used to recognise non-coding genes like rRNA and others, as well as genes that code for proteins.

Identifying non-coding repetitive sequences, including transposable elements, which are known to play a role in gene regulation, is also possible using it.

The sequence can reveal details about the makeup and operation of genes, but it is unable to reveal details about the concentrations of metabolites in cells, which can only be determined experimentally.

Therefore, the answer that cannot be determined from a genome sequence is B. Metabolite levels in cells.

Complete Question:

In functional  genomics, biologists use sequence information to identify the functions of various regions of genomes. Which of the following CANNOT be obtained from a genome sequence?

A. rRNA genes

B. Metabolite levels in cells

C. Genes encoding for transcription factors

D. Noncoding repetitive repeats

E. Amino acid sequences of proteins

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ms. t. has come for a prenatal visit. she complains of dependent edema, varicosities in the legs, and hemorrhoids. the best response is:

Answers

Doppler ultrasound is noninvasive, so it's often an option if your doctor can't feel your pulse manually.

Arteriography and ultrasound are two methods that can provide a discrete waveform. The most characteristic symptom of PAD is claudication, which is pain in the muscles of the lower extremities caused by walking and relieved by rest. Although claudication has traditionally been described as colicky pain, some patients report fatigue, weakness, pressure, or pain in the legs. The tissues and organs that make, store, and transport white blood cells that fight infections and other diseases. This system includes the bone marrow, spleen, thymus, lymph nodes, and lymphatic vessels. List pulse sites accessible for examination. Temporal artery, carotid artery, brachial artery, femoral artery, popliteal artery, dorsalis pedis, posterior tibial. Lymph nodes monitor the lymph flowing into them and produce cells and antibodies that protect our bodies from infection and disease.

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The movement of soil from one place to another place is called? ANSWER: GLACIATION, DEPLETION, or EROSION

Answers

Answer:

¿cual es la influencia que tiene la

What is the relationship between changing CO2 emissions and CO2 concentration?

Answers

Answer:  When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down.

Explanation:

Besides density, what other physical property can you use to confirm that the gold is indeed real gold?

Answers

gold conducts heat and electricity.
gold is highly reflective

In 1973, Stanley Cohen and Herbert Boyer inserted a gene from an African clawed frog into a bacterium. The bacterium then began producing a protein directed by the code found on the inserted frog gene. Analysis of the DNA from both the frog and the bacterium would reveal that

Answers

In 1973, Stanley Cohen and Herbert Boyer inserted a gene from an African clawed frog into a bacterium. The bacterium began producing a protein directed by the code found on the inserted frog gene. Analysis of the DNA from both the frog and the bacterium would reveal that the inserted frog gene had been replicated by the bacterium.

The DNA sequences of both organisms would be analyzed, and it would be found that the gene had been inserted into the bacterium's DNA. The bacterial DNA sequence would be analyzed before and after the insertion of the frog gene, and it would be found that the inserted frog gene was now present in the bacterial DNA.

The protein produced by the bacterium would also be analyzed, and it would be found that it was identical to the protein produced by the African clawed frog. This experiment showed that it was possible to manipulate DNA to create new combinations of genes, and it paved the way for many important advances in biotechnology.

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31a. Skeletal muscle is directly controlled and innervated by which component of the nervous system?
Upper motor neurons
Cerebellum
Lower motor neurons
Sensory cortex

Answers

Skeletal muscle is directly controlled and innervated by lower motor neurons.

Lower motor neurons (LMNs) are responsible for directly controlling and innervating skeletal muscles. They have their cell bodies in the spinal cord and brainstem, and their axons extend to the muscles they control. LMNs receive input from upper motor neurons (UMNs), which are located in the motor cortex of the brain.

The cerebellum and sensory cortex play important roles in coordinating and processing sensory information, but they do not directly control skeletal muscle.

The cerebellum helps fine-tune movements, while the sensory cortex processes sensory information from various parts of the body. Thus, it is the lower motor neurons that directly control and innervate skeletal muscles.

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4.In what phase of mitosis do new nuclear envelopes form around the separated chromosomes
Prophase
Metaphase
Anaphase
Telophase
None of the above

Answers

Telophase/srry of wrong

Which of the following is an example of how an organism depends on Earth's natural resources for survival?
A.
Humans grow corn and wheat as food sources.
B.
Beavers use tree branches to build dams and shelters.
C.
Plants take in nutrients and groundwater from the soil.
D.
all of these

Answers

Answer: D.
Explanation: They’re all using earth’s resources.
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in what ways does a stream transport its load, and which part of the load moves most slowly? choose all that apply. if you know that limx6f(x)x=5 and limx6g(x)=2, then evaluate the following limit: limx6f(x)g(x)=2 , then evaluate the following limit: Multiply numerator and denominator byx.x6limg(x)f(x)=? sodium chloride has a boiling point of what degree celcius conoces alguna otra forma en la que puedas orientarte sin el uso de los puntos cardinales cuntanos paso a paso sobre tu proceso A rectangular metal plate 20 cm by 40 cm will have a square cut from each corner, and the flaps formed will bend upward at right angles to make an open-topped rectangular box. Find the dimensions of this box in order that its volume will be a maximum. Round answers to 1 decimal place accuracy Fabian says that 25% of a number will always be greater than 10% of any other number.Complete one inequality to support Fabian's claim and one to show that he is incorrect. what type of device does susan b anthony employ in her speech when she asks ''are woman persons'' Peter is going to carpet a room that measured 9 x 13 feet. The carpet costs $18.75 a square foot. How much will peter spend SOS, I really need help! I accidentally slept in. f(x+4x)-S (X) Evaluate lim Ax-+0 for the function f(x) = 2x - 5. Show the work and simplification Find the value of "a" and "b" for which the limit exists both as x approaches 1 and as x approach can someone tell me if this is correct. what natural resource did the Nile River provide? False positives for the presence of nitrites can happen if the specimen is ________ for too long. A coworker just sent you a presentation to review. You noticed that she used different types of transitions on the same slide, and the animations and videos were distracting from the topic. Give your coworker advice about guidelines she can follow when using animation, transitions, and multimedia. Be sure to include at least four guidelines. ...- x-xI stg I can't think of a good answer- x-x what value of x makes the equation 6x + 12 = 42 true? Fine the volume of the rectangular prism. (Pls answer) Assume that you have paired values consisting of heights (in inches) and weights (in Ib) from 40 randomly selected men. The linear correlation coefficient r is 0.479. Find the value of the coefficient of determination. What practical information does the coefficient of determination provide? Choose the correct answer below. A. The coefficient of determination is 0.771. 22.9% of the variation is explained by the linear correlation, and 77.1% is explained by other factors. B. The coefficient of determination is 0.229. 22.9% of the variation is explained by the linear correlation, and 77.1% is explained by other factors. C. The coefficient of determination is 0.229. 77.1% of the variation is explained by the linear correlation, and 22.9% is explained by other factors. D. The coefficient of determination is 0.771. 77.1% of the variation is explained by the linear correlation, and 22.9% is explained by other factors What is the sticky, salty fluid that circulates through the body, bringing nourishment and oxygen to all parts of the body? critical thinking is used in writing a critique papwr and a concept paper because.... Evaluate the following integral (Calculus 2) Please show step by step explanation!