1. ¿Cuáles son las células que contiene la retina?​

Answers

Answer 1

Answer:

Células fotorreceptoras: Son los conos y los bastones. Transforman los impulsos luminosos en señales eléctricas.

Células bipolares de la retina. Conectan las células fotorreceptoras con las células ganglionares.

Células amacrinas. ...

Células horizontales. ...

Células ganglionares de la retina.


Related Questions

In a species of Asclepias (milkweeds) there are two alleles of a gene involved in the synthesis of cardenolides. One allele results in normal synthesis of these molecules, while the other allele prevents synthesis from occurring. Individuals who are heterozygous for this gene produce intermediate amounts of cardenolides. In a population of Asclepias where both alleles of the cardenolide synthesis allele are present the following phenotypes were observed:
Normal cardenolide concentration: 241
Intermediate cardenolide concentration: 720
No cardenolides: 39
What are the expected phenotypic frequencies in this population?
A.Normal: 0.36; Intermediate: 0.62; No cardenolides: 0.02
B. Normal: 0.36; Intermediate: 0.48; No cardenolides: 0.16
C. Normal: 0.24; Intermediate: 0.48; No cardenolides: 0.04
D. Normal: 0.50; Intermediate: 0.48; No cardenolides: 0.02
E. Normal: 0.24; Intermediate: 0.72; No cardenolides: 0.04

Answers

menenemmek ekekejekkwj wkekejkekw

Short-term mechanisms for regulating blood pressure include regulating peripheral vascular resistance and cardiac output through:________-

Answers

Answer:

Dilation or constriction

Explanation:

Short-Term mechanism for regulating blood pressure include regulating peripheral vascular resistance and cardiac output through dilation or constriction of the blood vessels while on the other hand, long-term mechanism for controlling of blood pressure done by the renin-angiotensin system. Brains stem is the part of the brain that is responsible for the controlling of blood pressure in the body.

Because the bell jar in the model lung cannot move, any changes in volume are a result solely of the movement of the rubber diaphragm. Match the position of the rubber diaphragm to changes in volume and pressure inside the bell jar and balloon size.

a. Galloons inflate
b. Balloons deflate
c. Volume inside bell jar increases
d. Volume inside bell jar decreases
e. Pressure inside bell jar decreases
f. Pressure inside bell jar increases

1. Rubber diaphragm up
2. Rubber diaphragm down

Answers

Answer:

1. Rubber diaphragm up-

b. Balloons deflate

d. Volume inside bell jar decreases

f. Pressure inside bell jar increases

2. Rubber diaphragm down-

a. Galloons inflate

c. Volume inside bell jar increases

e. Pressure inside bell jar decreases

Explanation:

The rubber diaphragm is the model to demonstart the various parts of the respiratory system and how they move during breathing process. In case of it moves down, the rubber diaphragm is stretched, the volume inside the bell jar increases which causes presursue decrease.

Balloon inhale or sucks in the air from outside and gets inflate. this increases the volume in the jar. The pressure is increased

Which of the following explains why the Midwest is not suffering as severe damage from acid rain as are the northeastern states?
a. Midwest has few sources of acid rain-forming pollutants.
b. pH of rainfall in Midwest is significantly higher than that in the Northeast.
c. soils in the Midwest have a higher buffering capacity than do those in the Northeast.
d. soils in the Midwest have a lower buffering capacity than do those in the Northeast.
e. Midwestern soils have lower concentrations of toxic metals to be leached into watersheds.

Answers

Answer:

a. Midwest has few sources of acid rain-forming pollutants.

Explanation:

Midwest has few sources of acid rain-forming pollutants because Midwest has  less number of factories which produces less pollution. Farming, mining, and manufacturing of different products are the major industries Midwest. Other industries like transportation, finance, and machinery are also important for the economy of Midwest. Due to less number of factories less amount of pollutants goes to the atmosphere and will not cause acid rain.

Explain the importance of studying cytology ​

Answers

Answer:

Each cell in the body and its components - tissues and organs - is a functional and structural entity. As a result, examining cytology can aid in the differentiation of normal and afflicted cells, as well as the identification of the disease's etiology at the cellular level.

OAmalOHopeO

The importance of water properties on plants and animals​

Answers

Question:

The importance of water properties on plants and animals.

Answer:

The importance of water in plants is that it helps plants to make their own food, because water plays a very important role in Photosynthesis, and as well it helps them to grow.

The important of water in animals is that it is main need for animals to survive as well as humans. Without water even a single organism won't exist in this Earth.

Hope it helps you

:)

The human body is made up of more than three-fourths of water, and all animals and plants require water to thrive.

Why water is essential for plants and animals​?

Water is used by all living things to transport nutrients throughout the body and remove waste. Among its many crucial functions, water aids in the digestion of food and the preservation of organisms' heat.

The term "universal solvent" refers to water's enormous capacity to dissolve a wide range of molecules, and it is this capacity that makes water such a priceless life-sustaining agent.

Water's function as a solvent aids cells in the transfer and utilization of molecules like oxygen or nutrients on a biological level.

Therefore, to do all the cellular processes by plants and animals there is need of water.

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7. Shawn plotted the data in a bar graph with two bars: one representing the number of bees per colony in the control cages and the other representing the number of bees per colony in the cages exposed to the fungicide. If the results support the hypothesis that fungicides harm bee development, what would you expect this bar graph to show? Describe the expected pattern in a few sentences.

Answers

Answer:

The first bar increases in length as compared to the second bar.

Explanation:

The length of the bar of control cages in graph increases because the number of bees per colony increases while on the other hand, the length of the bar of the cage that is exposed to fungicides decreases because the bees are negatively affected from the application of fungicides. They act abnormal in behaviour and adversely affected the reproduction of bees that greatly affected its population.

What is the phase that not all cells enter, but it is a phase where cells are not actively dividing

Answers

Answer:

The phase that not all cells enter, but is a phase where cells are not actively dividing is called the G0 or non-dividing phase.

Answer:

G₀ phase

Explanation:

Some types of cells divided slowly or not at all. These cells may exit the G₁ phase and enter a resting phase called G₀ phase. In G₀ phase, a cell is not actively preparing to divide. It's simply doing its job. For some cells, G₀ is a permanent state, while others may restart cell division given the right signals.

g If the sequence of bases in the DNA coding strand were CCG AGT, the sequence of amino acids in the polypeptide chain would be _

Answers

Answer:

GGCUCA

Explanation:

¿ como se producen los cambios de el siglo? porfa es urgente :(

Answers

como, Estes todos .........

The predominant forms of actin inside a cell are ATP-G-actin and ADP-F actin. What would be the consequence for actin filament assembly/disassembly if a mutation prevented actin's ability to bind ATP

Answers

Answer:

If actin is unable to bind to the ATP molecule, it will not be able to assemble into its two dominant forms.

Explanation:

As shown in the question above, the two predominant forms of actin are ATP-G-actin and ADP-F actin. As we can see, the formation of these two molecules involves the presence of an ATP molecule, in which case, the concentration of actin inside an organism depends totally on the capacity of the actin to be able to bind to an ATP molecule. If there is a mutation that prevents this binding from occurring, actin will not be able to form its two dominant forms, which will harm the presence of actin in the body.

Question 8 of 30
Which of these fields of study would be the most useful for someone
interested in preserving native plants in grasslands?
A. Meteorology
B. Botany
C. Chemistry
D. Anthropology
SUBMIT

Answers

Answer:

botany

Explanation:

since it deals with the study of plants

Elephants are considered K-strategists because they give birth to only one calf at a time and most have five years in between having another calf. Calves stay under the protection of the mother and her herd until maturity at 10-15 years of age. What type of survivorship curve do elephants tend to follow

Answers

Answer:

Type I curve

Explanation:

The K-strategist are species characterized by relatively stable populations that fluctuate at the carrying capacity of the habitat or niche in which organisms reside. Elephants are considered as K-strategists because they have a low population growth rate and relatively stable populations. There are three different types of survivorship curves. The Type I curve (also referred to as A curve) is characteristic of k-strategist organisms. Humans and elephants exhibit a Type I survivorship curve in which organisms tend to die when they become elderly. These species have a small number of offspring and provide parental care to ensure their survival. In a Type II survivorship curve, species produce many offspring and only some offspring survive (e.g., birds), while in Type III survivorship curve organisms produce many more offspring and most do not survive (i.e., r-strategists such as frogs or insects).

how is the oxygen cycle disturbed by deforestation

Answers

Answer:

If deforestation is disturbed then the photosynthesis cycle is disturbed, which results in the oxygen cycle being affected. With a decrease in trees, a decrease in photosynthesis occurs, which cause a decline in the oxygen cycle. A decline in the oxygen cycle results in more polluted air.

Explanation:

Without trees, humans would not be able survive because the air would be unsuitable for breathing. Due to deforestation, there would be fewer trees to "clean" the air. Deforestation is the action or process of clearing of forests, or the state of having been cleared of forests.

Trees and plants, in general, produce energy for growth using a process known as photosynthesis. Using light, water and carbon dioxide, a plant produces energy in the form of sugar and releases oxygen into the air.

Deforestation, as well as a rise in the emissions and our global temperature, affects the air that we breathe. This is because all trees take in carbon dioxide and other pollutants which are known to cause a lot of problems in the atmosphere and to humans. This inevitably results in people breathing dirtier and more polluted air that normally wouldn't happen.  

Long-term exposure to polluted air can have permanent health effects such as: Accelerated aging of the lungs. Loss of lung capacity and decreased lung function. Development of diseases such as asthma, bronchitis, emphysema, and possibly cancer.

Trees are responsible for taking the carbon from the atmosphere through photosynthesis in order to make energy. This carbon is then either transferred into oxygen and released into the air by respiration or is stored inside the trees until they decompose into the soil. Therefore, the absence of trees would result in significantly higher amounts of carbon dioxide in the air and lower amounts of oxygen. This bad quality air would also be full of airborne particles and pollutants like carbon monoxide, sulfur dioxide and nitrogen dioxide.

In addition to the decrease of oxygen in the atmosphere, it would allow excessive amounts of carbon dioxide to remain. In the short term, since CO2 is one of the major greenhouse gases, it will undoubtedly lead to higher global temperatures which, in turn, would quicken the melting of the polar ice caps.

Mendel used
over 28,000 pea plants in his experiment. How does this large
sample size make his results more reliable?

Answers

Experiments in general are more reliable when a greater sample size is used. When using a small sample size, a mistake or fluke can greatly effect the outcome of the experiment. With a large sample size, there is more data to understand averages and deviations to the average data. The average will likely be more accurate with more data, which would make his sample size more reliable.

Answer:

Large sample sizes provide more accurate mean values.

Explanation:

More accurate mean values will identify outliers which could skew the data in a smaller sample.

How many cranial nerves is it?

Answers

Explanation:

there are 12 cranial nerves

State three ways of increasing the life-span of cut flowers​

Answers

Answer:

Clean your vase thoroughly, Keep flowers away from fruit, Flower Food and Water

Explanation:

Even after taking into account all of the variants discovered by this study, there are still likely to be other variants that you have not discovered. The affected and unaffected cohorts are roughly the same size and are drawn from a similar population with similar ancestry. All of the following modifications to the study are likely to allow identification of new variants associated with the disease, EXCEPT ____________.

Answers

Question Completion with Options:

a. increasing the size of your cohorts.

b. increasing the diversity of your cohorts.

c. increasing the size of your affected cohort.

d. increasing the diversity of your affected cohort.

Answer:

All of the following modifications to the study are likely to allow identification of new variants associated with the disease, EXCEPT

a. increasing the size of your cohorts.

Explanation:

Option A is chosen because increasing the size of the cohorts will be equally divided between the affected and unaffected cohorts since the study discovered that these two classes are roughly the same size.  Therefore, new variants of the disease may not likely be identified and isolated unless the other modification options are followed instead of Option A.

Brain researchers have found wider surface fissures, enlarged ventricles, and atrophy of the brain areas for regulating motivation, emotion, attention, actions, and perception in persons suffering from:________

a. bipolar disorder.
b. schizophrenia.
c. multiple personalities.
d. conversion disorders.

Answers

Answer:

B. Schizophrenia

Explanation:

yes

Which toxin is of particular concern for the infected host if antibiotics are used resulting in mass pathogen lysis? Cholera toxin Tetanus toxin Botulinum toxin Endotoxin​

Answers

Answer: Endotoxin

Explanation:

Antibiotics generally target the cell walls of bacteria with the aim to dissolve it so that the body's immune system can be better able to attack it. When the antibiotics target these cell walls, pathogen lysis occurs and ruptures the cell.

Endotoxins are located in those cell walls and once free, are a source of concern because they can cause an array of medical problems with inflammation being amongst the mildest.

QUESTION:

╭☞ Which toxin is of particular concern for the infected host if antibiotics are used resulting in mass pathogen lysis?

ANSWER:

╭☞ Endotoxin

Explanation:

Base on our researcher endo toxin is particular concern for the infected host if antibiotics are used resulting in mass pathogen lysis

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___________

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Explain what caused the color change of the peppered moths from light to dark after the Industrial Revolution.

Answers

Answer:

Addaptational changes since they had to adjust to a new environment

The color change of the peppered moths from light to dark after the Industrial Revolution Adaptational changes since they had to adjust to a new environment.

What is  the Industrial Revolution?

During the industrial revolution, the color of bark of the trees became dark. Due to this the predators could easily detect the light colored moths on the dark colored bark of the trees.  

This lead to evolution of light colored moth resulting into dark colored moths through the process of natural selection which made the newly evolved moth population more prominent to the predation attack.  

It became difficult for the predators to trace moth on the tree barks as they became capable of camouflaging against the color of  bark.

Thus, adaptation is the main reason.

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Calculate the fractional saturation for hemoglobin when the partial pressure of oxygen is 78 mm Hg. Assume hemoglobin is 50% saturated with oxygen at a partial pressure of 24 mm Hg and that the Hill coefficient is 3.

Answers

Answer:

YO2 = 0.98

Explanation:

What the Difference in guard cell during day and night

Answers

Answer:

the differences in guard cell during day and night is;

1 guard cell during day it always stays with us or follow us

2 guard cell during night have to look after us like we are their children..

The energy source for active transport is ________ , while the force driving facilitated diffusion is ________.

Answers

Answer:

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Explanation:

1.) Citrus Red Mites can disperse to other locations by ______.

Choose the best answer.

a. crawling and roping.

b. using their wings to fly.

c. egg expulsion shot into other plants.

d. being carried by other insects.




2.) Mark all correct answers.

The mouth parts of insects are important for these reasons.



They can help us identify the insects

They tell us how they feed on a plant

What show the sort of damage they cause.

The kinds of disease they spread.

Answers

Answer:

A crawling and roping

They can help us identify the insect

Can the use of badger control (including culling) be justified in the
prevention of the spread of bovine tuberculosis (

Answers

Answer:

no. badger vaccination is better

Explanation:

spreading mostly happens cattle to cattle

"killing badgers will not solve the problem. Badgers are not the primary cause of the spread of bTB in cattle: the primary route of infection is cattle-to-cattle contact[2]. The Government's badger cull is flying in the face of science. It should be putting more resources into speeding up the development of an effective cattle vaccine, amongst other measures"

wildlife life trusts

What is the principle of size exclusion chromatography?​

Answers

Answer:

The underlying principle of SEC is that particles of different sizes elute (filter) through a stationary phase at different rates. This results in the separation of a solution of particles based on size.

hope it helped

Size exclusion chromatography (SEC) separates molecules based on their size by filtration through a gel.

What is size exclusion chromatography?

Size exclusion chromatography (SEC) splits molecules based on their size by filtration via a gel. The gel consists of spherical beads including pores of specific size distribution. Separation happens when molecules of various sizes exist included or excluded from the pores within the matrix.

Size exclusion chromatography exists named gel filtration chromatography because the gel effectively allows for the filtering of molecules from a sample based on molecular size. However, unlike other methods, the larger molecules elute first.

Size-exclusion chromatography (SEC), also understood as molecular sieve chromatography, exists a chromatographic procedure in which molecules in solution exist separated by their size, and in some cases molecular weight. It exists usually applied to large molecules or macro molecular complexes such as proteins and industrial polymers.

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Explain the benefit of higher myoglobin levels for individuals living at high altitudes

Answers

An individual with higher myoglobin levels would be able to carry and store more oxygen in their muscle tissues than a normal person.

How does the burning of fossil fuels contribute to climate change?

Answers

When fossil fuels exist burned, they release large quantities of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, pushing global warming.

What is fossil fuels?

Fossil fuels exist created from decomposing plants and animals. These fuels exist found in the Earth's crust and include carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas exist examples of fossil fuels.

A fossil fuel exists as a hydrocarbon-containing material constructed naturally in the earth's crust from the remains of dead plants and animals that exist extracted and burned as a fuel. The primary fossil fuels exist as coal, crude oil, and natural gas.

When fossil fuels exist burned, they release large quantities of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, pushing global warming.

Global warming exists usually directed to human-induced warming of the Earth system, whereas climate change can be direct to natural or anthropogenic change. The two phrases are often used interchangeably.

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Recall that one approach to the study of cell cycle regulation has been to fuse cultured cells that are at different stages of the cell cycle and observe the effect of the fusion on the nuclei of the fused cells (heterokaryons). When cells in Gl are fused with cells in S, the nuclei from the Gl cells begin DNA replication earlier than they would have if they had not been fused. In fusions of cells in G2 and S, however, nuclei continue their previous activities, apparently uninfluenced by the fusion. Fusions between mitotic cells and interphase cells always lead to chromatin condensation in the nonmitotic nuclei. Based on these results, identify each of the following statements about cell cycle regulation as probably true (T), probably false (F), or not possible to conclude from the data (NP). Sort each statement into the appropriate bin.
1. The transition from mitosis to G1 appears to result from the disappearance or inactivation of a cytoplasmic factor present during M-phase.
2. The activation of DNA synthesis may result from the stimulatory of one or more cytoplasmic factors.
3. Gl is not an obligatory phase of all cell cycles
4. The transition from G2 to mitosis may result from the presence in the G2 cytoplasm of one or more factors that induce chromatin formation.
5. The transition from S to G2 may result from the presence of a cytoplasmic factor that inhibits DNA synthesis.
A. T
B. F
C. NP

Answers

Answer:

1. T

2. T

3. NP

4. F

5. F

Explanation:

In somatic cells, the cell cycle can be divided into 1-the interphase, 2-the mitotic phase or M phase, and 3-the G₀ phase. In turn, the interphase of the cell cycle can be divided into three phases: 1-the gap 1 (G1) phase or growth 1 phase, 2-the S phase (DNA replication or DNA synthesis), and 3-the gap 2 (G2) phase or growth 2 phase. During the G1 phase, the cell synthesizes key enzymes which are required during DNA replication (S phase) and cell division (M phase). Cytoplasmic factors are proteins and messenger RNAs (mRNAs) that control cell functions during the cell cycle. This cycle is modulated by proteins known as control factors, i.e., cyclins and cyclin-dependent kinases (Cdks) that work together to control the progression through different phases of the cell cycle. The transition from S to G2 occurs after DNA replication. This transition (S to G2) is controlled by a DNA damage checkpoint orchestrated by the ATM (Ataxia telangiectasia mutated) and ATR (Ataxia Telangiectasia and Rad3 related) kinases which are recruited to DNA damage sites. Moreover, the ​transition from G2 to M phase is mediated by the accumulation of mitotic inducers, which lead to an increase in the activity of mitotic kinase and finally trigger mitotic entry.

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One hypothesis that proposes to explain senescence notes that cells that divide throughout the life course have shortened DNA sequences at the end of the chromosomes. This is referred to as the ________ hypothesis. The north pole of magnet A will __?____ the south pole of magnet B The existence of the principal-agent problem: Select one: A. increases the risk of buying stock in a corporation B. implies that managers that have the same incentives as the board of directors C. increases the risk of becoming the sole proprietor of a business D. does all of the above. photosynthesis is to chloroplasts as cellular respiration is toa. chloroplastsb. cytoplasmc. mitochondriad. nuclei i think it's mitochondria but i just wanna make sure!10 points!! what is the [h+] if the ph of a solution is 11.13 pls help How were men and women culturally similar in the Chickasaw and Choctaw tribes The slope of diagonal AB is ___ , and its equation is ___. Find cos R. A. cos R =29/21B. cos R =21/20C. cos R =21/29D. cos R =20/29 If y = 2x3 - 4x and dx, dt equals 4 , find dy, dt when x = 1. Give only the numerical answer. For example, if dy, dt = 3, type only 3 Express as a trinomial.(2x-6)(2x-8) how did militarism in europe threaten peace on the continent A student draws two parabolas on graph paper. Both parabolas cross the x-axis at (-4, 0) and (6.0). The y-intercept ofthe first parabola is (0,12). The y-intercept of the second parabola is (0, -24). What is the positive difference betweenthe a values for the two functions that describe the parabolas ? Write your answer as a decimal rounded to the nearesttenth. Which rhetorical device doesPaine use in the followingexcerpt from Section 2 of TheCrisis?"All that Howe has beendoing for this month past israther a ravage than aconquest"A. compare/contrastB. repetitionC. rhetorical questionD. simile the most common mineral group is broken into the subgroups of ferromagnesium and non ferromagnesium Give 2 reasons why the former dictator, Batista was not popular among the Cuban people Solve for x. Round to the nearest tenth, if necessary. Calculating Sin or Cos or Tan AFluids in which the shear stress must reachcertain minimum value(yield stress)before flow commences are called Lol, I'll give 15 points for this.Imagine it is 1934. Twelve-year-old Wong Kai Chong leaves China and climbs aboard an enormous ship that will be his home for nearly a month. He journeys across the Pacific Ocean with dozens and dozens of other people who dream of a new life in America. Kai's father is waiting for him in San Francisco.2Kai's heart leaps when he finally sees the beautiful California coast. Kai knows he isn't safe yet, though. Before Kai can become an American, he must pass an interview with the immigration officers. Kai is detained, or held, at an immigration station near San Francisco called Angel Island. He waits there, like a prisoner, until the immigration officers decide whether or not to let him into America.3During Kai's interview, the immigration officers don't seem to care that he is young, scared, and far away from his home and family for the first time. What is the name of your village in China? the officer barks. How many rooms were there in your house? What did the chairs look like? Kai knows that his answers must match what his father said before him. If they don't, he will be sent back to China.4Kai's story is told in the book, Kai's Journey to Gold Mountain. It is the fictional account of the challenges faced by more than 175,000 Chinese immigrants who came to America between 1910 and 1940.Coming to America5It wasn't always so hard for Chinese people to enter the United States. The first Chinese immigrants, almost all men, arrived during the California gold rush in the mid-1800s. Gold Mountain, as they called America, was full of opportunities for Chinese immigrants. Many worked at farming, mining, and building railroads, and they were able to send money home to their families in China. Compared to the hard life that many people had in China, life on Gold Mountain was a dream.6As more and more Chinese immigrated, however, America became less welcoming. There was a job shortage in the United States, and American laborers resented the Chinese for being willing to work for lower pay. In 1882, the U.S. government passed the Chinese Exclusion Act, making it almost impossible for Chinese workers to enter the United States. There was one group of Chinese, however, that could not be legally kept out of the countrythose with a parent who was a United States citizen. Just as it is now, American law guarantees citizenship to anyone born in the United States and to anyone whose parent is a U.S. citizen, regardless of their birthplace.7Of course, many Chinese who wanted to immigrate to the United States did not have a parent here. Their solution was to become paper sons and paper daughters by buying fake papers showing a parent residing in the United States. They could do this because Chinese who had already entered the United States would often list many people from their village or town as their sons and daughters in an effort to help others enter. This was especially easy to do after 1906, when a great earthquake in San Francisco destroyed most, if not all, of the official records.Immigration Station8In 1910, an immigration station opened on tiny Angel Island outside of San Francisco, off the California coast. The purpose of the Angel Island Immigration Station was to enforce the Chinese Exclusion Act. As Chinese entered San Francisco, they were inspected. Those who did not enter the country immediately were sent to Angel Island for further questioning. Angel Island was very different from the immigration station on Ellis Islandthe New York entry port on the other side of the country.9In contrast to Ellis Island, where immigrants were processed and allowed entry fairly quickly, the goal of the officials at Angel Island was to deport, or send back, as many people as possible (see table). They asked the newly arrived immigrants detailed and difficult questions about the Chinese village they had come from or their family history. They tried to trap the immigrants into giving answers different from those of their resident parent. Immigrants were detained on the island for weeks, months, and even years. Immigrants whose witnesses lived in the eastern United States could wait an especially long time. Detained immigrants spent most of their time crowded into military-style barracks, or bunkhouses. It was a lonely, frustrating, and often depressing experience.Powerful Poetry10Angel Island's doors finally closed in 1940 when China and the United States became allies during World War II (19391945). Then, in the 1970s, a park ranger found poetry painted, written, and engraved on the walls of the barracks. The poems describe the boredom, sadness, and even anger that many people felt during their time at Angel Island. 4. Convert 23 miles per hour to kilometers per minute. (1 mile = 1.609 kilometers) what are life domains