what is the stucture called in agnathans, which will become the endoskeleton in more evolutionary anvanced organism???


please2× i need help​

Answers

Answer 1

Answer: If evidence from fossil and living forms is combined, the Agnatha are distinguishable from the other craniates (Gnathostomata) by what they lack: jaws, lateral fins supported by fin rays, vertebrae, a horizontal semicircular canal in the ear, and genital ducts. The nervous, sensory, endocrine, circulatory, excretory, and muscular systems have the same basic structure as those of gnathostomes but are generally simpler. Unlike the slitlike gills of gnathostomes, the gills of agnathans are pouchlike and open through pores. The presence in the ammocoete larva of an endostyle, a gland that otherwise is found only in protochordates (such as the amphioxi and tunicates), suggests that the Agnatha represent an evolutionary level intermediate between the protochordates and gnathostomes; however, the degree of specialization of known agnathans (particularly the single nostril of most forms) rules out the possibility that they are ancestral to the gnathostomes.

Explanation:


Related Questions

Help me on this bc I don’t know the answer
And u know this mannnnn

Help me on this bc I dont know the answer And u know this mannnnn

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Answer:

Much of Michaelangelo's painting's were not emotionally expressive.

Explanation:

Michaelangelo's paintings were done in the Renaissance but we hyper realistic.

Answer: Most of his work wasn't emotionally expressive.

When is france joined with patriots?

Answers

Answer: February 6, 1778

Explanation:

France joined with patriots in 1776.

After the American victory at the battle of Saratoga, France decided to come into the war on the sides of the United States, declaring war on Great Britain on February 6, 1778.

The France helped the patriots because earlier, in the French and Indian wars, France and Britain were enemies and fought over the American Land. When the patriots proved themselves in the fight at Yorktown, France took it as a chance to give back to Britain.

French involvement in the American revolutionary war of 1775 - 1783 began in 1776 in which the France use to secretly shipped supplies to the continental's armies of 13 colonies when it was established in June 1775.

French helped patriots by sending the patriots military aid through a company called Rodrigue Hortalez et compagnie. The French supplied arms up to 90% to the Americans in the Saratoga campaign.

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On Edg: Who won the fighting in North Africa in 1943?
A. Axis forces
B. Allied forces
C. North African forces
D. German forces

Answers

The Allied Forces won the fighting in North Africa in 1943

Answer:

the answer is German forces

WHOEVER ANSWERS MY QUESTION GETS BRAINLIEST
The First Continental Congress was called to ....

WHOEVER ANSWERS MY QUESTION GETS BRAINLIESTThe First Continental Congress was called to ....

Answers

Answer:

Boycott all British Goods

Explanation:

hopefully it's right : )

Which characterization best describes the relationship between technological innovations and leisure time during the 1920s?

Answers

The 1920s were a vibrant decade marked by rapid change. It is not surprise that modernist themes permeated the decade's literature, art, and popular culture.

The best word to use to characterize the artistic and cultural movements connected to the "Roaring Twenties" is probably "experimental."During this time, creativity thrived as authors and artists "pushed the edge" by experimenting with novel techniques and concepts. In the 1920s, art and culture were all about challenging the existing quo and creating something fresh and exciting. Sexuality, technology, and societal advancement were major themes in the decade's art and culture.As was previously said, the 1920s saw a great deal of social change. Incomparable chances for leisure were made possible by the 1920s' economic success and technological advancements. Throughout the 1920s, a brand-new kind of music called jazz had tremendous popularity. Jazz music, with its focus on rhythm and improvisation, embodied everything carefree and contemporary. Jazz performers Duke Ellington and Louis Armstrong were both well-known at this time.

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Question is attached in the image below

Question is attached in the image below

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Answer:

grassland and savannah that borders the desert area of the Sahara

Explanation:

look it up :)

Which Federal Reserve group is acting in this situation?

Answers

Answer:

The Federal Open Market Committee is acting in this situation.

Explanation:

hope this helps you :)

Answer:

The Federal Open Market Committee is acting in this situation.

Explanation: sample answer from edmentum

What First Amendment right are the people in this photograph
expressing?

A) freedom of the press
B)freedom of religion
C)freedom of assembly
D)right to privacy

Answers

Answer:

its freedom of assembly

Explanation:

What was the focus of the ratification debates in each state?
O A. Whether to
accept or reject the Constitution
• B. Whom to elect as the first president

C. Whether to vote for Federalists or Anti-Federalists
• D. Whether to add a bill of rights to the Constitution

Answers

Answer:

Whether to accept or reject the constitution

True or false. The colonists and founding fathers tried many solutions to fix issues with Great Britain before formally leaving. PLS HELP

Answers

the answer is um true

what was the profession of margaret sanger, one of the most important and vocal advocates of birth control in the early twentieth century?

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Margaret Sanger was a nurse and women's health activist who became one of the most important and vocal advocates of birth control in the early twentieth century.

Margaret Sanger was a nurse who subsequently became an advocate for birth control and a sex educator. She formed the American Birth Control League, which eventually changed its name to Planned Parenthood, and was one of the most well-known birth control activists in the early twentieth century. Sanger strove to ensure that all women, regardless of social or economic background, had access to birth control because she was a fervent supporter of women's reproductive rights. Her efforts promoted access to family planning tools and advanced women's rights.

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How did Stalin cause the Cold War?

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Stalin's actions and policies during and after World War II were a major cause of the Cold War. Stalin's refusal to work with the West, his imposition of Communist rule in Eastern Europe, his aggressive military posture, and his promotion of Communism around the world, all contributed to the tensions between the Soviet Union and the West that led to the Cold War.

what are the consequenece of war? discuss the social, health and economic effect of modren warfare.

Answers

The consequences of modern warfare are manifold, and it affects every single stratum of mankind, whether it be social, cultural, political or economic.

The consequences of war can be either long- or short-lasting and are widely dispersed. Soldiers' perspectives on war differ from those of civilians. Even though both sides suffer during a war, atrocities are particularly committed against women and children. Up to two million people killed in armed conflicts in the last ten years were children. Another legacy of these conflicts is the widespread trauma brought on by these atrocities and the suffering of the civilian population, which leads to significant emotional and psychological stress. Nowadays, internal conflicts often cause more harm to civilians than external conflicts. This is a result of the growing trend among combatants to strategically target civilians. Mass city destruction and long-lasting effects on a nation's economy are also consequences of war.

Social Effect of War - Forced migration or displacement occurs most frequently during times of war and can be harmful to both the community and an individual. When a war breaks out, a lot of people flee their homes out of fear for their lives and the lives of their families, which causes them to lose their way either internally or externally.

Cultural assets are at risk of being destroyed, taken away, looted, and robbed during a war. Archaeological artefacts, excavation sites, archives, and museums are examples of cultural heritage that are damaged by combatants to fund the conflict.

Health Effect of War- Women and men are negatively impacted by conflict, which frequently leads to gender-specific challenges that are not acknowledged or addressed by the majority population around the world. Because they are more probable to die from indirect causes than direct causes, women are affected differently by war.

Economic Effect of War -The effects of war on the economy could be devastating both during and after the conflict.  A community's or nation's regular activities are interfered with, and possible property damage results.

The labour force is impacted in many different ways, but it is most frequently impacted by the severe loss of life, changes in population, the shrinking labour force due to the influx of refugees and displacement, and the destruction of infrastructure, which in turn leads to a decline in productivity.

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Where is the water source you would need to filter water?​

Answers

As water travels through the ground, it gets filtered in a natural way, much like how it is in the filtration process where it is passed through sand. Water also gets naturally purified as it flows through some kinds of ecosystems, especially in the wetlands.

During the reign of ____________ the predominant style was baroque. German peasants Louis XV Napoleon Louis XIV

Answers

There are different kinds of leadership. During the reign of  Louis XIV the predominant style was baroque.

What is Louis XIV and the Baroque style about?

In the Art and State of France, under the rulership of Louis XIV, there was a sought of absolute monarchy where all power resided with the king.

Versailles was known to have reinforced the image of the Sun King and uses the Baroque style with other elements, that acts as a visual linkage to Louis' rule and to the power of Imperial Rome.

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what was the most widely read illustrated periodical in america in the middle 1800s? winslow homer and thomas nast was this magazines leading illustrators.

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Harper's Weekly was the most widely read illustrated periodical in america in the middle 1800s.

An American political publication with its headquarters in New York City was Harper's Weekly, A Journal of Civilization. It had drawings as well as international and domestic news, fiction, articles on a variety of topics, and humor. It provided in-depth coverage of the American Civil War and several images of key moments in the conflict.

It served as Thomas Nast's platform during the most significant time in its history. The most significant national publication in the nation during the Reconstruction era was Harper's Weekly. It both reflected and impacted popular opinion.

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who would most likely support the expansion of political participation included in the 26th amendment

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The 26th Amendment, which was ratified in 1971, lowered the voting age in the United States from 21 to 18. The expansion of political participation included in this amendment would most likely be supported by young people, who were directly affected by the change.

Prior to the ratification of the 26th Amendment, many young Americans were eligible to serve in the military and fight in the Vietnam War, but were not allowed to vote in elections or have a say in the political decisions that affected them. The movement to lower the voting age gained traction as a result of this perceived injustice, and was championed by youth-led organizations such as Students for a Democratic Society.

In addition to young people, advocates of civil rights and democratic participation more broadly would also likely support the expansion of political participation included in the 26th Amendment. This group includes individuals and organizations that advocate for policies that make it easier for all citizens to participate in the political process, regardless of age, race, gender, or socioeconomic status.

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Why would a strong central government be important for a new country such as america ?

Answers

Answer:

A strong central government could represent the nation to other countries

Explanation:

It could also control individual states that would not cooperate with the rest. Federalists also believed that a strong central government could best protect individual citizens' rights and freedoms.

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why did federalist argue for a new charter that would replace the articles of confederation?​

Answers

Answer:

To strengthen the central government.

Explanation:

The federalists argued that the Articles of Confederation weakened the Congress of its power and sovereignity. Though Congress was endowed with numerous powers on paper, in reality the Articles rendered no real power to the Congress.

This was seen as a major threat by the federalists so they demanded for a new charter called The Constitution to strengthen the central government/Congress. The federalists finally concluded the Constitutional Convention of 1787 and a the US Constitution was drafted.

Answer:

The Articles were not holding the Union together.

Explanation:

I took the test

1948- The Marshall Plan was signed into effect by the United States, promising money to struggling countries in Europe.
A. Capitalist
B. Communist
C. neither

Answers

The answer is option A.  Capitalist, The Marshall Plan was signed into effect by the United States, promising money to struggling countries in Europe was capitalist in nature.

How would you define economy in plain English?

An economy is a collection of related production and consumption processes that ultimately decide how resources are distributed within a community. The needs of persons residing in and operating inside it are met through the production and consumption of goods and services as a whole.

One illustration of economy would be,

Traditional economies, which use a country's traditions and history to direct the production and distribution of products, are a prominent example of economies. Agriculture, fishing, and hunting form the foundation of traditional economies.

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What is the responsibility of the United States as the inventor of the atomic bomb, and as a world nuclear power?

Answers

Answer: death of many due to nuclear wars

Explanation:

In the early 1900s what type of government did most Europeans have?

Answers

Explanation:

Shifts in the political spectrum and larger issues of industrial society prompted important changes in government functions through the second half of the 19th century. Mass education headed the list. Building on earlier precedents, most governments in western Europe established universal public schooling in the 1870s and ’80s, requiring attendance at least at the primary levels. Education was seen as essential to provide basic skills such as literacy and numeracy. It also was a vital means of conditioning citizens to loyalty to the national government. All the educational systems vigorously pushed nationalism in their history and literature courses. They tried to standardize language, as against minority dialects and languages (opposing Polish in Germany, for example, or Breton in France).

A second extension of government functions involved peacetime military conscription, which was resisted only in Great Britain. Prussia’s success in war during the 1860s convinced other continental powers that military service was essential, and conscription, along with steadily growing armaments expenditures, enhanced the military readiness of most governments.

Governments also expanded their record-keeping functions, replacing church officials. Requirements for civil marriages (in addition to religious ceremonies where desired), census-taking, and other activities steadily expanded state impact in these areas. Regulatory efforts increased from the 1850s. Central governments inspected food-processing facilities and housing. Inspectors checked to make sure that safety provisions and rules on work hours and the employment of women and children were observed. Other functionaries carefully patrolled borders, requiring passports for entry. Most countries (Britain again was an exception) increased tariff regulations in the 1890s, seeking to conciliate agriculturalists and industrialists alike; while not a new function, this signaled the state’s activist role in basic economic policy. Most European governments ran all or part of the railroad system and set up telephone services as part of postal operations.

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why is the parthenon considered the finest example of ancient greek architecture?

Answers

The Parthenon is considered the finest example of ancient Greek architecture because of its balance and harmony of parts.

Perfection was a top priority for the humanist Greeks. Aside from the fact that it was the largest temple of its era and was made entirely of marble, the Parthenon is regarded as one of Greece's greatest architectural achievements.

But also because, as the Roman architectural historian Vitruvius noted in around 25 BC, it had a number of subtle visual improvements that were probably made to make the structure seem even more flawless and stunning to the human eye than it would have been without them.

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The Buddha believed that suffering ends when __________ are controlled.
A.
actions
B.
people
C.
desires
D.
tempers


Please select the best answer from the choices provided

A
B
C
D

Answers

Answer:

B

Explanation:

The UN was created at the apex of US power. The Security Council is made up of the winners in World War II. In the coming decades, new great powers are predicted to rise. India, Brazil, and Indonesia will grow in power. Japan has been the second largest economy in the world and yet does not have a permanent seat on the Security Council. Do you think the Council should be reformed? If so, how?
On balance, do you think the UN has been a force for order and stability in the world? Why or why not? What changes should it undertake?
How might the rise of China and the relative decline of the United States affect the UN? Do these states agree on the norms promoted by the UN?

Answers

The question of reforming the UN Security Council is a subject of ongoing debate. The Council's current composition, which reflects the power dynamics of the post-World War II era, may not fully represent the emerging global powers.

Reforms could involve expanding permanent seats to include influential countries like India, Brazil, and Japan, ensuring a more representative and inclusive Council.

Additionally, addressing the veto power held by the permanent members could be considered to enhance decision-making. Assessing the UN's impact on global order and stability is nuanced.

While the UN has played a vital role in peacekeeping and humanitarian efforts, its effectiveness can be hindered by power politics and conflicting national interests. It should undertake changes to improve efficiency, transparency, and effectiveness in addressing global challenges.

The rise of China and the relative decline of the United States will certainly affect the UN. China's growing influence may lead to shifts in power dynamics and differing perspectives on global norms and policies.

It is important for the UN to engage both China and the United States in shaping global norms and ensuring cooperation to effectively address global challenges. The extent to which these states agree on the norms promoted by the UN will depend on their respective interests and priorities.

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What two groups of people who were still prohibited from voting?
HELP PLEASE QUICK!!

What two groups of people who were still prohibited from voting?HELP PLEASE QUICK!!

Answers

Answer:

In 1869, the Fifteenth Amendment prohibited the government from denying a citizen the right to vote based on that citizen's "race, color, or previous condition of servitude". The major effect of these amendments was to enfranchise African American men, the overwhelming majority of whom were freedmen in the South.

Explanation:

Explain in a PEE paragraph how The French and Indian War resulted in an American War of Independence?

Answers

Answer:

The French and Indian War ended in a British Victory, with the help of an army made up mainly of American colonists. This result allowed Britain to seize the French colonies in North America, but it also came at a great financial cost for the crown. The British tried to pay for this cost by creating new taxes on the American colonies, a measure that was met with outcry and revolt by the colonists. These tensions never subsided, and would eventually break into the American War of Independence.

Please help. I will make the first person to answer the brainlyest. It is worth 40 points. Please give a good explanation.

Please help. I will make the first person to answer the brainlyest. It is worth 40 points. Please give
Please help. I will make the first person to answer the brainlyest. It is worth 40 points. Please give
Please help. I will make the first person to answer the brainlyest. It is worth 40 points. Please give
Please help. I will make the first person to answer the brainlyest. It is worth 40 points. Please give
Please help. I will make the first person to answer the brainlyest. It is worth 40 points. Please give

Answers

Answer: 1. Spain 2. The abolition movement 3. assisted freed African Americans 4. The abolition movement developed out of the Awakening 5. The English Bill of Rights and Common Sense.

Explanation:

Write a short paragraph that explains the central idea of the article. Use at least two details from the article to support your response.

Article: Fighting wildfires with fire in Alberta, Canada

A large wildfire has been burning in Alberta, Canada. It has quickly spread for hundreds of miles. Now, a fifth of the houses in the city of Fort McMurray are lost. Because of this, 88,000 people living there have been evacuated.
The flames seemed to slow down over the weekend. This might be a turning point, but can a wildfire this large be put out?

Setting Control Fires
Bruce Malamud is a professor in London, England, who studies dangerous natural events. He says that there are a few ways to stop a fire. In order to burn, fire needs heat, air, and dry plants. Firefighters can remove any one of these to stop wildfires from spreading. It is also possible to stop the fire from spreading in certain directions. Firefighters sometimes start fires intentionally. These are called control fires. Once plants are burned, wildfire can no longer
use them to spread. Planes called water bombers are sometimes used too. They drop water, or other fire suppressants, over burning land.

Danger Of Burning Ash

Fire can spread a large distance away from the fire-front. This happens when burning ash is carried by the wind. This will often start other fires elsewhere.

John Thomson studies the forests in Scotland. Thomson says that to fight the fire it is important to study the wind, dry plants, and the slope of the land. Wind cannot really be helped. This is why firefighters will pay close attention to the weather. If it blows the right way, the wind can push the fire back along its path. If not, the wind will help it spread.
Wildfire is able to spread by burning dry plants on the ground and trees. These plants are called fuel. Firefighters and forest guards deal with dry plants by bulldozing them out of the way.

Always Staying Downhill

Knowing the shape of the land can also help. "Fires burn much more aggressively going uphill than they do downhill," says Thomson. It is a bad idea to try to fight fire from uphill.
In Alberta, firefighters will try to stay on the downhill side of a slope.

When a fire is small and moving downhill, it could be attacked directly. In this case, firefighters beat the flames with special tools. They will move from behind the fire, where the land has already been burned. In this way, they can make sure that the fire will not go back in their direction.

In Alberta, an indirect attack may be better. Firefighters may have to get in front of the fire and set control lines. These control where the fire can spread. Control lines can be set by using something like a highway or river.

Water bombers can also help to set control lines. They are often used to wet the plants ahead of the fire, or along its sides. This slows it down as it spreads forward or gets bigger. As Thomson says, this is more useful than just dropping water on the fire.

Answers

Answer:

Explanation:

The central idea of the article is that fighting wildfires with fire can be an effective strategy to control their spread. Two details from the article support this idea. Firstly, the article mentions that firefighters sometimes start intentional fires, known as control fires, to remove potential fuel sources and prevent the wildfire from spreading further. These control fires consume the dry plants and make it difficult for the wildfire to use them as a means of spreading. Secondly, the article highlights the use of water bombers, which drop water or fire suppressants on burning land and wet the plants ahead of the fire or along its sides. This technique slows down the fire's spread and proves to be more effective than simply dropping water on the fire itself. By employing these strategies, firefighters can gain better control over wildfires and minimize their destructive impact.

HELPPPP!!!!! i will give 70 points

HELPPPP!!!!! i will give 70 points

Answers

Answer:

A Consistent set of legal rights makes the law "fair" for all.

Explanation:

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