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The fossil record clearly shows that ________. the fossil record clearly shows that ________. large complex organisms evolved long before simple. nearly all species that have existed in the past still exist today. all species evolve from pre-existing species. new species appear suddenly and fully differentiated, without an ancestral species. several different species can hybridize to produce a single new species

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Answered by answersmine AT 22/10/2019 – 02:35 AM

I think the answer is all species evolve from pre-existing species. This was based on Charles Darwin’s Theory of Evolution which he learned during his expeditions.He identified that some fossils have similarities with other existing animals, in which he believed were a part of adaptation in order to survive.

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Which of the following statements is false? The number of chromosomes is different in different organisms. There are more genes in a cell than there are chromosomes. A single gene can only influence a single trait. The karyotypes for a male human and a female human look different.

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Which of the following statements is false? The number of chromosomes is different in different organisms. There are more genes in a cell than there are chromosomes. A single gene can only influence a single trait. The karyotypes for a male human and a female human look different.

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14. Within a single use of the scientific method, which of the following steps can only be performed after data is collected? A. Controls and variables are chosen. B. The initial experiment is designed. C. The initial hypothesis is formed. D. Conclusions are drawn.

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The answer is D. Conclusions are drawn. 
This is the only choice that can be done after data gathering, formulation, and analysis.

Other choices are in correct

A. Controls and variables are chosen.  (Identified before an experiment)
B. The initial experiment is designed. (Has been planned before an experiment is done.)
C. The initial hypothesis is formed. (Before the experiment a hypothesis is already drawn.

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Which of the following describes a major difference between classical Greece and Persia? A. Greece granted more liberal rights to women and allowed citizens to have more control over the government. B. Classical Greece provided all citizens with political rights, while Persia did not allow for any political rights. C. Classical Greece was organized into independent city-states, while Persia was ruled over by a single empire. D. Classical Greece had an enormous military force, while Persia’s military was small and disorganized.

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Answer:

C. Classical Greece was organized into independent city-states, while Persia was ruled over by a single empire.

Explanation:

The classical greek empire was actually a compound of independent city states that had more or less the same political and social structure, te base of the social pyramid were the slaves and only male had citizenship and political status, while in the Persian empire there were no slaves, they were ruled by a centric fiure in the King and he appointed several governors to rule over little provinces so his influence and power could reach to the whole empire.

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Scanning means that the reader A. focuses on the text's conclusion. B. looks for words to catch his or her attention. C. searches for the most important details. D. reads every single word of the article.

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Scanning means that the reader A. focuses on the text’s conclusion. B. looks for words to catch his or her attention. C. searches for the most important details. D. reads every single word of the article.

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Scanning means that the reader A. focuses on the text's conclusion. B. looks for words to catch his or her attention. C. searches for the most important details. D. reads every single word of the article.

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Scanning means that the reader A. focuses on the text’s conclusion. B. looks for words to catch his or her attention. C. searches for the most important details. D. reads every single word of the article.

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The single northern continent was named: A. Gondwana B. Pangaea C. Laurasia D. North America

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Answer 1

Mexico ⇔ H) one of only 17 countries recognized as megadiverse

Explanation:

Mexico is a country within the U.S. and Central America that’s identified for its Pacific and Gulf of Mexico beaches and its varied landscape of mountains, deserts, and jungles. Old wrecks such as Teotihuacán and the Mayan city of Chichén Itzá are spread throughout the country, as are Spanish colonial-era towns.

Answer 2

Great Lakes ⇔ D) youll find nearly 20% of the worlds fresh surface water here

Explanation:

The Great Lakes also declared the Laurentian Great Lakes and the Great Lakes of North America, are a set of interconnected freshwater lakes found essentially in the upper mid-east area of North America, on the Canada–United States frontier, which join to the Atlantic Ocean through the Saint Lawrence River.

Answer 3

Jaguar ⇔ B) an endemic species inhabiting Sierra Gorda

Explanation:

The jaguar is a wild cat species and the only existing member of the family Panthera native to the Americas. The jaguar’s present scope enlarges from the Southwestern United States and Mexico in North America, across much of Central America, and south to Paraguay and northern Argentina in South America.

Answer 4

Rio Grande ⇔ E) stretches of it act as a natural border between US and Mexico

Explanation:

The Rio Grande is one of the major rivers in the southwest United States and northern Mexico. The Rio Grande originates in south-central Colorado in the United States and runs to the Gulf of Mexico. Along the way, it makes part of the Mexico–United States frontier.

Answer 5

Gueretaro pocket gopher ⇔ J) an endangered species found in Sierra Gorda

Explanation:

Queretaro pocket gophers Cratogeomys neglectus is discovered only in the northeastern part of the state of Queretaro, Mexico. They are established in a small scale of mountains identified as the Sierra del Doctor, which is part of the city of Pinal de Amoles.

Answer 6

Cascade range ⇔ G) location of Mount St.Helens

Explanation:

The Cascade Range or the Cascades is the main mountain area of western North America, spreading from southern British Columbia through Washington and Oregon to Northern California. It involves both non-volcanic hills, such as the North Cascades and the famous volcanoes recognized as the High Cascades.

Answer 7

Nearctic ⇔ F) North America and Canada make up this ecoregion

Explanation:

The Nearctic is one of the eight biogeographic regions compounding the Earth’s land surface. The Nearctic region comprises most of North America, including Greenland, Central Florida, and the mountains of Mexico.

Answer 8

Isthmus of Panama ⇔ A) narrow curve of a land that connects North and South America

Explanation:

The Isthmus of Panama, also historically recognized as the Isthmus of Darien, is the thin strip of land that lies between the Caribbean Sea and the Pacific Ocean, joining North and South America. It comprises the country of Panama and the Panama Canal.

Answer 9

Guatemala ⇔ C) Central American country that runs Parallel to the Cocos ocean plate

Explanation:

Guatemala, a Central American country south of Mexico, is home to volcanoes, rainforests, and old Mayan sites. The capital, Guatemala City, highlights the majestic National Palace of Culture and the National Museum of Archaeology and Ethnology. Antigua, west of the capital, includes protected Spanish colonial houses.

Answer 10

Lake Erie ⇔ I) this body of water is a natural border between the U.S and Canada

Explanation:

Lake Erie is the fourth largest lake of the five Great Lakes in North America, and the eleventh-largest globally if regulated in terms of surface area. It is the southernmost, insane, and miniature by volume of the Great Lakes and therefore also has the lowest average water home time.

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Which of the following is an incorrect statement? A. Gastrovascular cavities have a single opening through which animals both ingest food and expel wastes. B. Extracellular digestion is the process in which food is broken down outside cells in a digestive system. C. Intracellular digestion happens when animals digest food inside specialized cells that pass nutrients to other cells by diffusion. D. Digestive tracts have 2 openings, which allows food to move in 2 directions.

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Answer:

The incorrect statement is option D. Digestive tracts have two openings, which allows food to move in two directions.

Explanation:

The digestive system is a long twisted tube from the mouth to the anus with a series of accessory organs connected to it. This long twisted continuous tube having two openings, mouth and the anus, called the digestive tract that allows food to move in one direction only (mouth to anus).

In the digestive tract, food enters from the mouth and food passing through pharynx, esophagus, stomach, small intestine, and large intestine. The indigestible food or waste eliminated through the anus.

So, the digestive tract allows food to move in one direction only.

Thus, incorrect option would be option D.

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Write log24 + log23 as a single logarithm.

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Write log24 + log23 as a single logarithm.

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Many different types of mutations can occur within the body. Sickle cell anemia is a disease that occurs when a mutation in a base pair of the hemoglobin beta gene causes a single replacement of the amino acid glutamic acid by the amino acid valine. As a result of this mutation, the individual’s blood cells take on a sickle shape under certain conditions and form clusters that can block blood vessels and cause organ damage. Which type of mutation causes sickle cell anemia? A)silent B)missense C)insertion D)frameshift

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The right option is; B)missense

Missense mutation is the type of mutation that causes sickle cell anemia

A missense mutation is a type of nonsynonymous substitution in which the change of a single nucleotide (base pair) influences the genetic code and results in a codon that code for a different amino acid. This type of mutation can affect the function of the protein, and it is responsible for human diseases such as, sickle-cell anemia and Epidermolysis bullosa.

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Frank corporation manufacturers a single product that has a selling price of $20.00 per unit. fixed expenses total $45,000 per year, and the company must sell 5,000 units to break even. if the company has a target profit of $13,500, sales in units must be:

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Answered by answersmine AT 22/10/2019 – 04:25 AM

Frank corporation manufactures a single product that has a selling price of $20.00 per unit. fixed expenses total $45,000 per year, and the company must sell 5,000 units to break even. if the company has a target profit of $13,500, sales in units must be:
Answer: 6,500

Post your answer

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PLEASE HELP!!!!!! The Jonas school district gives awards to its schools based on overall student attendance. The data for attendance are shown in the table, where Low represents the fewest days attended and High represents the most days attended for a single student. School Low High Range Mean Median IRQ σ High School M 128 180 62 141 160 55.5 41.5 High School N 131 180 49 159 154 48.5 36.5 High School P 140 180 40 153 165 32.5 31.5 Part A: If the school district wants to award the school that has the most consistent attendance among its students, which high school should it choose and why? Justify your answer mathematically. Part B: If the school district wants to award the school with the highest average attendance, which school should it choose and why? Justify your answer mathematically.

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Answer:

High School P has the most consistent attendance among its students.

School N should be awarded for the highest average attendance.

Step-by-step explanation:

Consider the provided information.

Part A: If the school district wants to award the school that has the most consistent attendance among its students, which high school should it choose and why? Justify your answer mathematically.

Standard deviation (σ) is a measure of how a data set is spread out.

If the standard deviation is low, this implies that the information tends to be near to the set mean, whereas a high standard deviation implies that the information points are spread across a wider spectrum of values.

Therefore, for more consistency we need to look for the low standard deviation.

From the provided table we can see that the school P has low standard deviation (σ) i.e 31.5

Hence, High School P has the most consistent attendance among its students.

Part B: If the school district wants to award the school with the highest average attendance, which school should it choose and why? Justify your answer mathematically.

The formula for mean is:

Mean=frac{x_1+x_2+...+x_n}{n}

Mean is the same as average.

The sum of mean or average will be larger if each students contributes more attendance.

For highest average attendance the school with higher mean should be awarded.

Hence, School N should be awarded for the highest average attendance.

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What is 3 In 3-In 9 expressed as a single natural logarithm

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What is 3 In 3-In 9 expressed as a single natural logarithm

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Which statement best describes the political structure of the ancient Mayas? The Mayas developed city-states that were powerful but independent. The Maya civilization included different groups unified under a single religion. The Maya civilization was ruled by an emperor and had about four hundred tribute states. The Mayas were ruled by representatives from different city-states.

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Karl Marx developed the economic theory of communism.

Further Explanation:

One of Karl Marx’s most famous contributions came in his book the Communist Manifesto. This book explained Mark’s views on government, the economy, and ultimately lead to the creation of communism as an idea.

A communism system is one that is economic and political in nature. In this system, the government would control the means of production, the distribution of goods and resources, and would overall have significant control over society. This system of communism is the opposite of the capitalist/democratic system used in America today. These two ideologies would clash during the mid 20th century in what is now known as the Cold War.

Marx’s ideas were based on his observations of the world around him. He felt that the mistreatment of labor by industry and private corporations would ultimately lead to an uprising by angry laborers all over the world.

Learn More:

Explanation of Cold War- brainly.com/question/1596857

Key Details:

Topic: World History, Communism

Grade Level: 7-12

Keywords: Karl Marx, Communism, Communist Manifesto

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Which correctly analyze why nationalism developed in 19th century Europe? A.Ethnic Groups galvanized around the idea of a single nation in opposition to Napoleons conquest B.French Nationalism that followed the French revolution provided an example for other people in Europe . C.The growth of the Austro-Hugarian Empire and the ottoman empire Gave nations a sense on pride D.Some enlightenment Philosophers Wrote about and encouraged the growth of national self determination HELP AsAP Pick 2 answer choices !

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The Reformation actually started after Columbus’s landing in North America. 

Treaty of Tordesillas in 1494 was forced on Spain and Portugal by the Pope. The Pope basically said that all lands in the New World belonged to Spain and all new non-Christian lands in the Eastern Hemisphere belong to Portugal. No other Catholic countries can do anything in those areas without the approval of the owner. 

The pope basically drew two lines on the globe setting the border. The western line started at the north pole cut half way through Greenland and ended at the south pole. The new world was everything to the west. Problem is that it ran through a chunk of Brazil which is why Brazil is an ex-Portuguese colony. 

The Eastern line starts at the North Pole runs through siberia, through the pacific just west of Japan, and cuts Australia in half. Of course, Australia hadn’t been discovered yet. Everything to the the east of this line is the new world. 

Obviously, this treaty didn’t hold up well, but the reformation gave the protestant countries an excuse to explore the new world since they didn’t have to take orders from the Pope. Even so, France, a catholic country, ignored it too. 

Really, the only country that was effected by the reformation in the exploration of the Americas was England. All the other countries, changed their religion once and then went to war with the nearest catholic country. Sweden became Lutheran and stayed that way. The Dutch Republic became Calvinists and stayed that way. 

England kept switching. First it was Catholic. Then, Henry VIII made it protestant. Then, Henry’s daughter Mary I made it catholic again. Henry’s other daughter Elizabeth I (with the two hit movies) made it Protestant again. 

Years latter, Oliver Cromwell over through the monarchy, executed the King Charles I, and established a Protestant fundamentalist religious military dictatorship. He outlawed drinking,smoking, gambling, theater, dirty books, sports, prostitution, and anything generally fun. He would have made Saudi Arabia proud. Basically, all you could do is work, pray, and die. Sex was allowed for creating children, but you couldn’t enjoy it. 

When Cromwell died, the people of England said enough was enough and brought back the King. Charles II kicked out the fundamentalists and brought back drinking, smoking, gambling, dirty books, sports, prostitution, and having fun during sex. Incidentally, those were also all his hobbies. 

This brings us to the famous Pilgrims. They were part of Cromwell’s crowd. They kept agitating a return to the no-fun policy. They annoyed everybody. They weren’t persecuted for practicing their religion, they were persecuted because they kept trying to force their religion on everyone else. Sort of like Southern Baptists. 

Charles II was the most easy going monarch in British history. Do realize how annoying you have to be to get him to throw you out. 

Charles’s brother James II was obsessed with turning Great Britain catholic again. After four years of trying, they kicked him and his followers out. 

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If 20 beats are produced within a single second, which of the following frequencies could possibly be held by two sound waves traveling through a medium along a common path at the same time A. 38 Hz and 63 Hz B. 18 Hz and 26 Hz C. 47 Hz and 55 Hz D. 22 Hz and 42 Hz

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Answer:

a) The time the police officer required to reach the motorist was 15 s.

b) The speed of the officer at the moment she overtakes the motorist is 30 m/s

c) The total distance traveled by the officer was 225 m.

Explanation:

The equations for the position and velocity of an object moving in a straight line are as follows:

x = x0 + v0 · t + 1/2 · a · t²

v = v0 + a · t

Where:

x = position at time t

x0 = initial position

v0 = initial velocity

t = time

a = acceleration

v = velocity at time t

a)When the officer reaches the motorist, the position of the motorist is the same as the position of the officer:

x motorist = x officer

Using the equation for the position:

x motirist = x0 + v · t (since a = 0).

x officer = x0 + v0 · t + 1/2 · a · t²

Let´s place our frame of reference at the point where the officer starts following the motorist so that x0 = 0 for both:

x motorist = x officer

x0 + v · t = x0 + v0 · t + 1/2 · a · t²      (the officer starts form rest, then, v0 = 0)

v · t = 1/2 · a · t²    

Solving for t:

2 v/a = t

t = 2 · 15.0 m/s/ 2.00 m/s² = 15 s

The time the police officer required to reach the motorist was 15 s.

b) Now, we can calculate the speed of the officer using the time calculated in a) and the  equation for velocity:

v = v0 + a · t

v = 0 m/s + 2.00 m/s² · 15 s

v = 30 m/s

The speed of the officer at the moment she overtakes the motorist is 30 m/s

c) Using the equation for the position, we can find the traveled distance in 15 s:

x = x0 + v0 · t + 1/2 · a · t²

x = 1/2 · 2.00 m/s² · (15s)² = 225 m

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USING SEMICOLONS AND COLONS CORRECTLY Correct the punctuation in the following sentences by re-writing the sentence, adding semicolons and colons where they are needed and by changing other punctuation and capitalization as needed. Example 1. The following items were among those rationed in the United States during World War II coffee, cars, sugar, and tires. Corrected version: The following items were among those rationed in the United States during World War II: coffee, cars, sugar, and tires. In Washington, D.C., we visited three museums in a single day the National Portrait Gallery, the Freer Gallery of Art, and the National Museum of Natural History.

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Answer:

In Washington D.C., we visited three museums in a single day : the National Portrait Gallery, the Freer Gallery of Art, and the National Museum of Natural History.

Explanation:

The correct rewriting of the sentence will be –

In Washington D.C., we visited three museums in a single day : the National Portrait Gallery, the Freer Gallery of Art, and the National Museum of Natural History.

The use of the comma right after Washington is wrong as it is the name of a single particular place so it should instead be written as Washington D. C.

Also, a semicolon has to be inserted in between day and the. Since the sentence lists a number of places, the use of a colon is necessary to show the list of the places visited.

So, the changes in the sentence are-

(a) remove the comma (,) in between Washington and D.

(b) put a colon (:) right next to the word “day”.

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How many milliliters of sodium metal, with a density of 0.97 g/mL, would be needed to produce 34.5 grams of sodium hydroxide in the single replacement reaction below? Unbalanced equation: Na + H2O —> NaOH + H2

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The balanced chemical reaction is as shown below,

                 N₂ + 3H₂  –> 2NH₃

The equation shows that every 3 moles of hydrogen, H2, there would be 2 moles of ammonia, NH3, that is going to be formed. Using this concept, we solve for the unknown in this item. 

Since we are restricted only of the number of hydrogen, it becomes our limiting reactant. 

          (6 moles H2) x (2 moles NH3/3 moles H2) = 4 moles NH3

Therefore, given enough amount of N2, the amount of NH3 that can be formed out of the 6 moles of H2 is equal to 4 moles. 

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A metal sample is heated and placed into the water in a calorimeter at room temperature. Which statement best describes how the calorimeter can be used to determine the specific heat capacity of the metal sample? Energy transfers to the metal from the water and calorimeter until they are all at room temperature. Energy transfers from the metal to the water and calorimeter until they are all at room temperature. Energy transfers to the metal from the water and calorimeter until they all reach a single temperature. Energy transfers from the metal to the water and calorimeter until they all reach a single temperature.

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This problem is to apply Roult’s Law.

Roult’s Law states that the vapor pressure, p, of a solution of a non-volatile solute is equal to the vapor pressure of the pure solvent, Po solv, times the mole fraction of the solvent, Xsolv

p = Xsolv * Po sol

X solv = number of moles of solvent / number of moles of solution

The solvent is water and the solute (not volatile) is glycerin.

Number of moles = mass in grams / molar mass

mass of water = 132 ml * 1 g/ml = 132 g

molar mass of water = 18 g/mol

=> number of moles of water = 132 g / 18 g/mol = 7.33333 mol

mass of glycerin = 27.2 g

molar mass of glycerin:, C3H8O3: 3 * 12 g/mol + 8 * 1 g/mol + 3*16 g/mol = 92 g/mol

number of moles of glycerin = 27.2g / 92 g/mol = 0.29565

total number of moles = 7.33333 moles + 0.29565 moles = 7.62898 moles

=> X solv = 7.33333 / 7.62898 = 0.96125

=> p = 0.96125 * 31.8 torr ≈ 30.57 torr ≈ 30.6 torr.

Answer: 30.6 torr

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The United States Student Association (USSA) was founded in 1947 to represent the interests of students to Congress. The USSA is an example of A. a single interest group. B. an ideological interest group. C. a labor interest group. D. a professional interest group.

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Which leader was backed by the United States during the Korean War?

The united states Supported the south Korean leader Syngman Rhee

Explanation:

Syngman Rhee was a South Korean politician, the first and the last Head of State of the Provisional Government of the Republic of Korea, and President of South Korea from 1948 to 1960. Nation supported by the USA through the Korean War. Led by Syngman Rhee. Cold War battle in which UN soldiers fought to protect South Korea from takeover by Communist North Korea, delivering a stalemate in 1953.

ANSWERED AT 22/10/2019 – 11:54 AM


QUESTION POSTED AT 22/10/2019 – 11:54 AM

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A molecule in which the central atom has no lone pairs and forms four single bonds is said to have a ________ shape.

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A molecule in which the central atom has no lone pairs and forms four single bonds is said to have a ________ shape.

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What process modifies light waves to vibrate in a single plane

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Answer:

Velocity of plane = 30.93 m/s

Explanation:

Considering vertical motion of ball

    Initial velocity, u =  0 m/s

   Acceleration , a = 9.81 m/s²

   Displacement, s = 195 m

   We have equation of motion s= ut + 0.5 at²

   Substituting

       s= ut + 0.5 at²

       195 = 0 x t + 0.5 x 9.81 x t²

        t = 6.31 seconds

Now considering horizontal motion of ball

   Acceleration , a = 0 m/s²

   Displacement, s = 195 m

   Time, t = 6.31 s

   We have equation of motion s= ut + 0.5 at²

   Substituting

       s= ut + 0.5 at²

       195 = u x 6.31 + 0.5 x 0 x 6.31²

        u = 30.93 m/s

Velocity of plane is horizontal initial speed of ball = 30.93 m/s

Velocity of plane = 30.93 m/s

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Which of these BEST describes the primary goal of meiosis? A) The nucleus is divided without mutation. B) A single cell divides into two daughter cells. Eliminate C) All chromosomes are replicated and passed on to the daughter cells. D) Daughter cells are produced with only half the chromosomes of the parent cell.

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The right answer is D.

Meiosis consists of two successive cell divisions that will give birth to gametes.

After the meiosis, the original cell gave birth to four haploid cells whose genomes were recombined in a unique way.

In humans, the cells that will participate in meiosis are spermatocytes and oocytes.

In the cells that will enter into meiosis, the replication of A.D.N. occurred during interphase, each chromosome consists of 2 chromatids connected by their centromere. (Each chromatide is formed of a double-stranded A.D.N molecule and molecules that maintain its structure)

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Changes in a single gene are called what

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Changes in a single gene are called what

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A synthesis reaction will produce a single

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Answer:

The coefficient of CO₂ is 5.

Explanation:

    Balancing the reaction:

___C₅H₁₂ + ___O₂ → ___CO₂ + ___H₂O

There are 5 C in the left side, so we put 5 on the right side:

___C₅H₁₂ + ___O₂ →  5CO₂ + ___H₂O

There are 12 H in the left side, so we put 6 as the coefficient of H₂O:

___C₅H₁₂ + ___O₂ →  5CO₂ + 6H₂O

Finally, there are 16 O in the right side, so we put 8 as the coefficient of O₂

___C₅H₁₂ + 8O₂ →  5CO₂ + 6H₂O

The coefficient of CO₂ is 5.

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