What is the evidence that chiasmata are points of physical exchange between chromatids?.

Answers

Answer 1

Knobs and translocations are the evidence that chiasmata are points of physical exchange between chromatids.

Cytological indicators like as knobs and translocations have been used to demonstrate that there is a physical exchange of chromosome arms during meiosis. The chiasma is a structure that arises between two homologous chromosomes by crossover recombination and physically connects the two chromosomes during meiosis.

It is particularly important to develop during cell division because it aids in the attachment of chromosomes to opposing spindles. Chiasmata assist chromosomes in appropriately dividing. If there are chiasmata during metaphase I of meiosis, the alignment will be correct. Thus, these two evidence point to physical changes between chromatids in meiosis.

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Related Questions

which step in the scientific method do you graph results classified information and make calculation?​

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According to the research, the correct option is Data analysis. It is the step in the scientific method where you graph results classified information and make calculation.

What is scientific method?

It is the series of steps that must be followed to obtain valid knowledge from a scientific point of view, using reliable instruments for this.

Among the necessary steps that make up the scientific method are:

ObservationFormulate a hypothesisExperimentationData analysisPresentation of the scientific theory

In this sense, Data analysis is the stage that uses graphs for the representation of data, generally numerical and make calculation, with a relationship between them, which facilitates the interpretation of the results.

Therefore, we can conclude that according to the research, the correct option is Data analysis. It is the step in the scientific method where you graph results classified information and make calculation.

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after a skeletal muscle fiber is treated with a membrane permeable drug that speeds up the action of the sr ca 2-atpase, how would the first twitch differ? 1 point the twitch would last the same amount of time the twitch would be shorter the twitch would produce more tension the twitch would last longer

Answers

The twitch would be shorter .

What is membrane permeability?

The passive diffusion rate of penetrated molecules through the biomembrane can be used to quantify a membrane's permeability. It is widely acknowledged that a single molecule's permeability is primarily influenced by its size, polarity, charge number, and molar mass.

Muscle goes through two stages: moderation and decrease. Once no reduction will occur upon inspiration, reduction is followed by an obstinate section. When the sr ca2+ ATPases are active and moving calcium back to the sarcoplasmic reticulum, this is the portion that occurs. The forces then start to decrease. The condition is referred to as an amalgamate tetanus if the inspiration are frequent enough to eliminate the relief quantity. The biological period is shorter and the amalgamate tetanus would be extended more quickly with faster sr ca2+ drives effort.

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You are working on a project to study Darwinian Evolution , and you are trying to identify the conditions for your experiment that would help you illustrate the arguments of Darwin's Theory of Evolution (Descent with Modification and Evolution by Natural Selection )All of the following conditions would help you with this project EXCEPT


A Having an easily controlled environment that you can introduce certain selective pressures that mimic natural conditions in the wild.

B) A model organism that is haploid , or only has one set of chromosomes , which makes it easier to see the effect of changes in the genotype (or genetics ) on changes in the phenotype (or physical and biochemical characteristics ) of the organism

C) A CRISPR - Cas9 based genetic system that allows you to introduce specific mutations into the germ line genome (gametic genome ) of your model organism .

D) Using a bacterial species that is known to swap pieces of DNA between individuals , allowing for the spread of certain characteristics throughout the population without having to reproduce and pass these traits on to offspring .

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All of the following conditions would help you with this project EXCEPT the one that uses a bacterial species that is known to exchange pieces of DNA between individuals, as this genetic transmission would impair the visualization of phenotypic adaptations in the environment.

D) Using a bacterial species that is known to exchange pieces of DNA between individuals, allowing certain traits to spread throughout the population without having to reproduce and pass those traits on to offspring.

What is meant by Darwinian evolution?

Darwin defined evolution as "descent with modification," the idea that species change over time, give rise to new species, and share a common ancestor. The mechanism that Darwin proposed for evolution is natural selection.

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What is the purpose of the media?
OA. To convey information
OB. To manipulate the audience
OC. To control people's lives
D. To entertain large groups of people

Answers

Answer: The purpose of the media is to entertain large groups of people.

Explanation: Media sources all serve for a common purpose, that is to share entertaining ideas and information.

Not all media conveys information; a primary purpose is just to consume time or be rid of one’s state of not being “busy.”

Not all media is present for the purpose of manipulation either. This would mean the audience of the shared information would be informed of falsehoods and inaccurate/unverifiable resources.

Media isn’t all about controlling people’s lives; that’s more of what the person watching it decides. Media is used for the purpose of entertainment, and some people overuse their resources of boredom-relief and it ends up being more of a priority than a background activity.

Final answer: The purpose of the media is answer D.) “To entertain large groups of people.”

Answer:

To entertain large groups of people

Explanation:

The purpose of the media to entertain large groups of people

dedifferentiation-associated inflammatory factors of long-term expanded human hepatocytes exacerbate their elimination by macrophages during liver engraftment + pdf

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Long-term cultured ProliHH (lc-ProliHH) was discovered to up-regulate a panel of innate immunity-related chemokines and cytokines, which were known as dedifferentiation-associated inflammatory factors, along with dedifferentiation (DAIF). Due to strong macrophage responses induced by DAIF, lc-ProliHH was particularly eliminated during engraftment.

What is Liver engraftment ?

Whether or not the transplanted cells multiply to replace a sizable amount of the liver mass, engraftment is the initial assimilation of the transplanted cells into the liver tissue.

Engraftment often takes place within the first 30 days following your transplant, while it occasionally may take longer. Engraftment indicates that your new cells are functioning appropriately and that your immune system is beginning to recover. The first step in your rehabilitation is engraftment.

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awad k, young s, aswath p, varanasi v: interfacial adhesion and surface bioactivity of anodized titanium modified with sion and sionp surface coatings. surf interfaces, 28:101645, 2022.

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Interfacial adhesion and surface bioactivity of anodized titanium modified with SiON and SiONP surface coatings, The statement is correct.

what is adhesion ?

Adhesion is a type of attraction between two dissimilar phases, the theory of adhesion can be up two types mechanical interlocking and physical and chemical bonding and it is a combination of three methods.

Mechanical interlocking means when two dissimilar phases interact with  one another by mechanical forces, requires a rough surface where the other material can enter.

Physical bonding includes van der Waals forces and the strength  is rather weak and unable to contribute that much bonding strength.

Chemical bonding consist of covalent, ionic and metallic bonding which are more stronger than physical bonds and are responsible for cohesive forces.

chemical bonding between two dissimilar materials is  more complicated due to the presence of few available bonding sites.

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True or False: In order for physical evidence to be used effectively for aiding an investigator, it must first be photographed and tagged as evidence and turned over to the officer in charge of the crime scene.

Answers

The answer would be false

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which condition occurs in the presence of cellular damage? group of answer choices cells shrink. atp production increases. osmotic pressure decreases. sodium and water move into the cell.

Answers

Sodium and water move into the cell in the presence of cellular damage.

Water and sodium ions are highly required by damaged cells in order to heal or rid them of various conditions.

Cellular Damage- Cell damage, is any type of stress that a cell experiences as a result of both internal and external environmental changes. This can be caused by a variety of things, such as physical, chemical, viral, biological, dietary, or immunological variables.

Immunological Variables- The immune system recognizes substances that contain antigens and makes an effort to get rid of them. Antigens are proteins that are found in the cells of our body. These include the subgroup of HLA antigens. Certain antigens grow familiar to our immune system, and it usually does not react negatively to them.

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F. Thomas Edison developed______in 1891 the first motion picture system

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F. Thomas Edison developed Kinetograph in 1891 the first motion picture system.

Kinetograph is simple a camera through which a series of images can be clicked of moving objects. These images are observed or viewed using another apparatus called the kinetoscope. The images clicked are viewed through a magnifying glass in the kinetoscope.

Motion picture system is any apparatus that can click pictures of moving objects. These pictures are clicked in a series that result in the formation of a film or video. The motion picture film usually contains 24 frames in one second. The motion pictures can be classified into three categories: camera, intermediate and laboratory, and print films.

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carbon dioxide removed by forests and stored in the biomass of trees helps reduce the impacts of climate change. this an an example of a

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Carbon dioxide removed by forests and stored in the biomass of trees helps reduce the impacts of climate change this is an example of a Carbon sequestration

What is Carbon sequestration ?

The most often produced greenhouse gas is carbon dioxide. The technique of removing and storing carbon dioxide from the atmosphere is known as carbon sequestration. It is one strategy for lowering atmospheric carbon dioxide levels in an effort to slow down the rate of global climate change.

Sequestering carbon in its natural sinks, such as forests, grasslands, and soil, is the most effective approach to remove it. Therefore, a rapid increase in the ability of natural carbon sinks to absorb atmospheric carbon is necessary to achieve the 1.5°C target. Additionally, this is necessary to stop desertification.

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what evolutionary mechanism has led to widespread antibiotic resistance among many species of bacteria? quizlet

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The correct answer is Gene flow. Due to this evolutionary process, bacteria developed antibiotic resistance.

Four processes contribute towards the evolutionary changes in any species. These changes include: natural selectionmutationgenetic drift gene flowThrough natural selection, only the fittest individuals of a species survive when they are faced with adverse conditions.  Mutation causes an alteration in the genetic material which might lead to changes in the morphological features or a the species over time. It could be an adaptation to survive as well.Genetic drift is the arbitrary change in the frequency of a gene variant in a population. Gene variations may fully vanish due to genetic drift, which would limit genetic variation.Gene flow occurs because of migration and this affects the gene pool frequencies of the existing population.Bacteria acquire antibiotic resistance through gene flow and they survive and reproduce further.

Gene flow is hence the evolutionary process that caused widespread antibiotic resistance in a wide variety of bacterial species.

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A researcher working in the field of evolution has decided that they would like to develop a species of pig that can fly. Out of the following issues, what is the biggest one that will impede the progress of this project?

A) Most pig species require lots of resources to maintain , making it difficult to care for the animals.

B) Pig genomes have many active retroviral elements in the genome that introduce many mutations every generation

. C) There are no pig species that have individuals with any characteristics that we associate with flight .

D) Designing an environment that would select for pigs that could fly or select against pigs that could not fly .

Answers

Of the issues, the biggest factor that will impede the progress of this project is There are no swine species that have individuals with characteristics that we associate with flight.

C) There are no swine species that have individuals with characteristics that we associate with flight.

What is genetic improvement of an example?

Genetic improvement is the process of intentionally selecting or modifying the genetic material of a living being to obtain individuals with characteristics of interest.

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What is the largest structure people have put into space?(1 point)

Answers

Answer:

The I.S.S(International Space Station)

Explanation:

This was the largest structure humans put into space. It was built between 1998 and 2011, and the space station is still planning missions to this very day.

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explain how the evolutionary theories after darwin affected (or did not affect) the fundamental principles of biological evolution.

Answers

History is occasionally altered by thoughts. This category includes Charles Darwin's idea of evolution by natural selection, making Darwin one of the most significant philosophers of the modern era. He contributed to a change in how people perceived the natural world and how humans fit within it.

What is Darwin's theory of evolution ?

The English naturalist Charles Darwin and others created the Darwinism theory of biological evolution, which claims that all species of organisms arise and develop through the natural selection of minute, inherited variations that improve the individual's capacity for competition, survival, and reproduction.

In his 1859 book "On the Origin of Species" (opens in new tab), Charles Darwin originally proposed the Theory of Evolution by Natural Selection.

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the maximum size of a cell is limited by . view available hint(s)for part a the maximum size of a cell is limited by . its need for enough surface area to make exchanges with its environment the number of organelles that can be packed inside the materials needed to build it the amount of flexibility it needs to be able to move

Answers

The organism's cells are constrained by their varying shapes and sizes. Due to the need for surface area to exchange gases, the size distribution of the cell has been limited. Thus, option a is correct.

What is a cell?

The smallest unit of an organization that is essential for life is known as a cell. The different cells' varying sizes and shapes enable them to carry out various functions and activities.

The size distribution of the cell has been influenced by the cell's requirement for a cell surface area and volume in order for the exchange of gases to actually happen.

Therefore, option a. the cell size is influenced by surface area and gas exchange.

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1) What did you notice about the letter e when you increased in magnification from the 4x to the 10x and then to the 40x:


a) Did the size (magnification) increase or decrease?

b) Could you see more of the entire letter or less?




(Subject science)

Answers

Answer:i can help but ur question is missing something give me the complete question and i will answer!!

Explanation:

An investigator wants to test for the presence of simple sugars in a sample. She adds reagent to her sample and also to a sample of distilled water. What reagent should she have added?.

Answers

An investigator wants to test for the presence of simple sugars in a sample. She adds reagents to her sample and also to a sample of distilled water.  She should use Benedict's reagent.

What do you mean by Benedict reagent?

Benedict's reagent (also known as Benedict's qualitative solution or Benedict's solution) is a chemical reagent and complex mixture of sodium carbonate, sodium citrate, and copper(II) sulfate pentahydrate.

It is frequently used in place of Fehling's solution to detect the presence of reducing sugars. The presence of other reducing substances also yields a positive result. Benedict's tests are those that use this reagent. A positive Benedict's reagent test results in a color change from clear blue to brick-red with a precipitate.

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nsulation particles can get trapped in the crimp joint and form the basis of a defective

Answers

Insulation particles can get trapped in the crimp joint and form the basis of a defective termination

What is conductor termination?

The work done at the end of a wire to enable it to connect to a device is known as a wire termination (connector, switch, terminal, etc.). In the aircraft sector, there are numerous termination kinds, but they can be divided into two major groups: crimp and solder.

When a contact or terminal is needed by the device, a crimp termination is carried out. The wire insulation is removed, and a crimp tool is used to join the contact or termination to the wire. The contact or termination is crimped onto the wire conductor using the tool. The aviation wiring harnesses and circuit breaker panels that Interconnect manufactures for various aircraft most frequently use this form of termination.

When the wire conductors are connected to the device directly a solder termination, is carried out. In order to connect the wire to the device, it is necessary to remove the insulation from the wire and apply flux and solder.

What is the basis of defective termination?

The insulation might be fractured, scratched, or pierced by poor stripping. As a result, the conductors' resistance to moisture and abrasion may decrease and changes in dielectric strength may result. Insulation fragments frequently become stuck in solder and crimp junctions.

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Why is it theorized that the asteroids die
not merge to form a planet?

Answers

Answer:

there's not enough total mass in the belt to form a planet. The belt contains only about 4 percent of the Moon's mass in asteroids

Explanation:

Science.com

Which of the following represents arrow C? ( Look at photo )
A. Carbon Dioxide
B. Glucose
C. Oxygen
D. Blood Vessel (capillary)

Answers

Glucose is the correct answer.

Answer: The right answer is B

Explanation:

the medium ground finch lives on the galapagos islands. birds with beaks of all sizes were originally part of this population. the finches are seed eaters. the types of food available for them to eat depends on the weather. during wet years, there is a large variety of food. during dry years, there is less food, and large, tough seeds are more abundant than small seeds.

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After the long drought, the researchers noticed that the certain differences in the population of the medium the ground finches living compared to those who lived before the drought are. A. They had smaller wings. B. had larger wings. C. were a new species. D. They had larger beaks

The Darwin's finches are the group of about 18 species of passerine the birds. They are well known for their remarkable diversity in the beak form and the function. They are often classified as the subfamily of Geospizinae or the tribe Geospizini. They belong to the tanager family and they are not closely related to the true finches.

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Answer: They had larger beaks.

Explanation:

Why would CH not form as a result of carbon’s interactions with other elements?

Answers

CH would not be formed as a result of carbon’s interactions with other elements and this is due to carbon's 4 valence electrons. Carbon would need four more electrons to fill its outer shell.

Why does carbon need four electrons?

Carbon has 6 atomic numbers and an electron configuration of 1s2 2s2 2p2. Found in all living organisms and organic compounds, carbon atom can form covalent bonds to as many as four other atoms and for carbon to achieve stability, it must find four more electrons to fill its second shell.

In summary, carbon would form covalent bonds with other elements in such a way that electrons would fill its outer shell, making a total of eight electrons in its outer shell thereby satisfying the octet rule.

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Carbon’s ability to form bonds with four other atoms goes back to its number and configuration of electrons. Carbon has an atomic number of six (meaning six protons, and six electrons as well in a neutral atom), so the first two electrons fill the inner shell and the remaining four are left in the second shell, which is the valence (outermost) shell. To achieve stability, carbon must find four more electrons to fill its outer shell, giving a total of eight and satisfying the octet rule

valence (outermost) shell. To achieve stability, carbon must find four more electrons to fill its outer shell, giving a total of eight and satisfying the octet rule

the external muscle layer of the pharynx consists of three muscles composed of voluntary skeletal muscle.

Answers

The pharyngeal external wall is made up of four muscles: the superior pharyngeal constrictor, the middle pharyngeal constrictor, the inferior pharyngeal constrictor, and the stylopharyngeus. The three paired inner pharynx muscles work together to elevate the larynx, shorten the pharynx, and act during swallowing and speaking.

The stylopharyngeus, palatopharyngeus, and salpingopharyngeus are the names of these muscles. The pharyngeal muscles, which consist of an outer circular layer and an interior longitudinal layer, form the lumen of the pharynx. The superior, middle, and inferior pharyngeal constrictor muscles make up the outer circular layer. The pharynx connects the nasal passages to the oesophagus and larynx.

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How can biology be studied at different scales, or levels?

Answers

Answer:

Typical levels of organization that one finds in the literature include the atomic, molecular, cellular, tissue, organ, organismal, group, population, community, ecosystem, landscape, and biosphere levels.

Explanation:

Typical levels of organization that one finds in the literature include the atomic, molecular, cellular, tissue, organ, organismal, group, population, community, ecosystem, landscape, and biosphere levels.

Biology can be studied at different levels from a single cell to the entire biosphere. The ladder from a single cell to the biosphere is known as the biological level of organization.

Discuss the circulatory system of an insect

Answers

Explanation:

Insects have an open circulatory system which lacks veins and arteries. The hemolymph flows freely through the body lubricating tissues and transporting wastes and nutrients. The hemolymph present in insects helps the heart pump it throughout its circulatory system.

Insects, like all other arthropods, have an open circulatory system which differs in both structure and function from the closed circulatory system found in humans and other vertebrates. In a closed system, blood is always contained within vessels (arteries, veins, capillaries, or the heart itself).

Give the translation for the mRNA and then use the codon table to get the amino acids. You only need to write the first three letters of the amino acids in the answer.

DNA - TAC - AGG - GTC - GCA - CAT - GGG

mRNA -

AA's -

Answers

mRNA: AUG - UCC - CAG - CGU - GUA - CCC

Amino Acids: Met - Ser - Glu - Arg - Val - Pro

you have 10 pounds of aquafaba. you need 6 oz to make one serving of consomme. how many servings can you make?

Answers

Answer:

9 servings

Explanation:

First, let's convert 6 oz to pounds so that the units are the same. There are 16 oz in 1 pound, so 16*6 oz = 96 pounds. There are 9 units of 10 in 96, so our answer is 9.

inhibition of post-synaptic kv7/kcnq/m channels facilitates long-term potentiation in the hippocampus

Answers

The development of synaptic plasticity and improved cognitive performance are facilitated by the activation of muscarinic acetylcholine receptors (mAChR). M(1) mAChR on CA1 pyramidal cells in the hippocampus inhibits both voltage-activated Kv7 potassium channels and small conductance Ca(2+)-activated KCa2 potassium channels.

What is Synapse ?

The places of contact between neurons known as synapses are where information is transferred from one neuron to the next. Presynaptic neuron, synaptic cleft, and postsynaptic neuron are the three components of synapses, which most frequently occur between axons and dendrites.

I = communicating axosomatic synapses, II = communicating axodendritic synapses, and III = communicating axoaxonic synapses are the three types we identified. They could be referred to as "complex communicating synapses" when three neurons get involved in the synaptic interaction.

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Which group of organisms contains no representative species that are known to fix nitrogen?.

Answers

Answer:

Eukaryotes is the correct answer.

Answer:

eukaryotes is the correct answer

irf4 transcription factor- dependent cd11b dendritic cells in human and mouse control mucosal il-17 cytokine responses.

Answers

The correct answer it will aid in the transcription of mouse in vivo findings to advance DC-based clinical therapies.

Although mouse and human dendritic cells (DCs) are made up of functionally distinct subsets, precise interspecies correlation is currently lacking. In this study, we discovered that murine lung and gut lamina propria CD11b+ DC populations were divided into two subsets: FLT3- and IRF4-dependent CD24+CD64 DCs and contaminating CSF-1R-dependent CD24CD64+ macrophages. CD24+CD11b+ DC loss inhibited CD4+ T cell-mediated interleukin-17 (IL-17) production in the steady state and after Aspergillus fumigatus challenge. Human CD1c+ DCs, which are the equivalent of murine CD24+CD11b+ DCs, expressed IRF4, secreted IL-23, and induced T helper 17 cell responses. Our findings revealed heterogeneity in the mouse CD11b+ DC compartment and identified IRF4-expressing DCs in mucosal tissues that are specialised in instructing IL-17 responses in both mice and humans.

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Question 6 a project manager forgets to assess how national holidays and team member vacations will affect the projects completion date. Now, because of team member time off, the project delivery will be two weeks late. What flexible planning strategy could the project manager have used to avoid the delay? 1 point use collaboration tools escalate to stakeholders enable decision-making assessing external constraints Under her cell phone plan, Hawa pays a flat cost of $51.50 per month and $3 per gigabyte. She wants to keep her bill at $64.10 per month. Write and solve an equation which can be used to determine gg, the number of gigabytes of data Hawa can use while staying within her budget. Amount of Amy's pocket money each day is 3 times as much as the pocket money of Flora's. And the amount of Paul's pocket money is $7 more than Amy's. If they have $980 of pocket money each week, how much pocket money does Paul have each day? In thick skin, what do the Dermal Papilla produce? Write the polynomial -10xy5 + 2xy - 6xy in standard form. the nurse is assessing a patient with chronic aortic regurgitation in the emegency unit of a health care facility EXERCISE 2 Underline each sentence fragment in the followingparagraph. On the blank line, write the number you find.Many workers have unusual jobs. Marty Fay has an unusualjob. For the city of New York. He works as a sort of detective.Marty lowers himself on a ladder. Below the busy city streets. Hewill search for leaky pipes. Leaks waste millions of gallons. Ofprecious water from sometimes half-empty reservoirs. Marty is atalented leak detector. Placing an electronic listening device on awater valve inside a manhole. The instrument picks up vibrations.From either a slow or a fast leak in a water pipe. Marty pinpointsthe exact location of the leak. Then other workers for the city. Comeand cut through the city pavement at that spot. When they haveMarty's help. The workers can easily find the leak and then mendthe pipe. An object is moving at a speed of 360 kilometers per hour. Express this speed in miles per day. Round your answer to the nearest whole number. Review. A 0.200-kg metal rod carrying a current of 10.0A glides on two horizontal rails 0.500m apart. If the coefficient of kinetic friction between the rod and rails is 0.100, what vertical magnetic field is required to keep the rod moving at a constant speed? What is the rising action in Hair Love Short Flim? Which of the following sentences is true? Use the number line to help you decide.6.0 - 7.0O 6.4 is greater than 6.6.O 6.3 is less than 6.0.O 6.4 is less than 6.2.O 6.8 is greater than 6.6. 5x+y when x=6 and y=-2 In the years after the glorious revolution, political power in england increasingly shifted toward. What is the value of the expression -2/7 - 4/7 Kelly wants to find out if the townspeople would be in favor of creating a local dog park. she pulls an equal number of people from several age groups and from different areas of town. Is this study likely to yield valid results? Explain. Question 2(Multiple Choice Worth 2 points)(01.03)Solve for x, given the equation x+9 -4 = 1.? What is this figurative language," It was 'illegal' to aid Jews in Germany" As the coaster starts rolling down the hill, it has a height of 10 m and a velocity of 42 m/s. What is the total energy of the coaster at this point? (It has a mass of 1300 kg.) How does the U.S. government factor into the importance of voting? Do you believe voting is an essential right that all citizens should use? Determine whether the relation is a function. Explain. { ( 2 , 5 ) , ( 4 , 2 ) , ( 3 , 3 ) , ( 5 , 4 ) , ( 2 , 5 ) } Multiple choice question. cross out A) Yes; for each element of the domain, there is only one element of the range. cross out B) Yes; for each element of the range, there is only one element of the domain. cross out C) No; the elements 2, 3, 4, and 5 are in both the domain and the range. cross out D) No; the element 5 occurs twice in the range.