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Passage 2: Unwanted Guests: The Dangers of Invasive Species (2016)
Groups of different animals affect one another in the natural world. For example, imagine that wolves and deer live in an area. A certain number of wolves need to eat a certain number of deer to survive. This keeps the population of the deer from getting too big. Similarly, the deer eat grass and vegetation. If there were more deer, they’d need to eat more grass.
The natural world is full of balances like these. Unfortunately, sometimes these balances are upset by invasive species. An invasive species is an animal or plant that has moved or been moved from its original environment to a new one. It has established a stable population there that is causing problems. Invasive species don’t cause problems in their original environments because they are kept in check by other plants and animals. In new environments, though, they have nothing stopping them from taking over.
One example of an invasive species is the zebra mussel. This animal originally only lived near Russia. Zebra mussels got into the Great Lakes by attaching themselves to the bottoms of ships. They now live in the Great Lakes too, where they upset the ecosystem. Zebra mussels eat algae, but so do fish. Many fish die as a result of there not being enough algae for all the animals to eat.
Plants can be invasive species too. Another example of an invasive species is the kudzu vine. Humans introduced the plant to the United States on purpose. Farmers were encouraged to grow it to protect their soil. Since then, it has gotten out of control. It now covers large parts of the South, outcompeting native plants for resources like water and sunlight.
Invasive species can cause environmental problems that are very difficult to fix. Because of this, it’s important to rethink introducing any species to a new environment. It’s also important to check to make sure when traveling that you are not bringing any plants or animals with you!
Which of the passage’s paragraphs provide evidence that most directly supports the underlined statement at the start of the last paragraph?
This question is asking us to figure out which of the excerpts listed as answer choices support the underlined statement. The first thing we need to do is identify the underlined statement:
Invasive species can cause environmental problems that are very difficult to fix.
Now we need to pick out the paragraphs that most directly support this statement. Let's skim the passage and summarize what each paragraph does in a phrase or short sentence before we consider the answer choices. Since they each specify a pair of paragraphs, summarizing the paragraphs first can help us approach them more efficiently.
Paragraph 1: General introduction about how species affect one another in environments
Paragraph 2: Introduction and definition of invasive species
Paragraph 3: Example of invasive animal species (Zebra mussel)
Paragraph 4: Example of invasive plant species (Kudzu vine)
Paragraph 5: Summary and recommendations
Which paragraphs support the underlined sentence? 3 and 4 do, because they each provide an example of how an invasive species causes problems in its new environment. The best answer choice is "Paragraphs 3 and 4."
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Passage 1
Ecuador, in South America, is home to 417 types of frogs and toads. Many of these species, or types of frogs, are at risk of dying out. In the last 50 years, many amphibian species have gone extinct. Salamanders, frogs, and toads are all amphibians. Amphibians are animals that spend part of their life in water and part on land and have backbones. Amphibians must live near water. Amphibians are in trouble because their habitat is being destroyed as trees are being cut down to make room for farms and roads. Amphibians also absorb pollution easily, because they breathe through their skin. Amphibians are usually the first to disappear when an environment is under threat from pollution. Due to pollution, some frogs are born with deformed, or wrongly shaped, body parts, such as extra legs and eyes. Frogs with deformed body parts are a clue for scientists that an environment is suffering. Between the destruction of their habitats and risks to frogs from pollution, frogs are at risk of endangerment and extinction. Scientists are working to save amphibians from their plight. Scientists want the government to pass laws that protect amphibian habitats and limit pollution.
Passage 2
My name is Maria and I am an amphibian conservation biologist. My job is to protect amphibians and their natural habitats, develop educational programs and exhibits to engage the public about amphibian conservation, and research to develop tools that will allow scientists to reintroduce amphibians back into the wild. Conservation biologists are scientists who study and protect animals and their environments. I work in a zoo, but I often travel to places like Ecuador or Brazil to observe a variety of amphibians in their natural habitats. Brazil, for example, has 1,022 different types of frogs, toads, and salamanders! In my work at the zoo, I specialize in only a small portion of that number. Here in the zoo, we have many amphibians in our care because some or all of their natural habitats were destroyed. We are not alone in our work to protect amphibians. Many people, in many kinds of jobs, are helping protect amphibians and their habitats. I partner with other scientists and lawyers, like my friend Fernanda, to help create laws that best support the conservation, or protection, of amphibians. Fernanda is an environmental lawyer who works to create laws like the Endangered Species Act that protect wildlife and their homes. She, in turn, needs to partner with government workers who can lobby and vote to help get laws passed. Together, our goal is to work together to build a world where these amphibians have a safe space to live outside of the zoo, in their natural habitat, protected from pollution or loss of space. We are working with a facility in Brazil to build protected space for amphibians to be released from the zoo and into a place where they can thrive.
What are the author’s main points in Passage 1?
The author makes three main points in Passage 1: That frogs are at risk of extinction, that pollution is harmful to frogs, and that frog habitats are being destroyed.
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Passage 1
Ecuador, in South America, is home to 417 types of frogs and toads. Many of these species, or types of frogs, are at risk of dying out. In the last 50 years, many amphibian species have gone extinct. Salamanders, frogs, and toads are all amphibians. Amphibians are animals that spend part of their life in water and part on land and have backbones. Amphibians must live near water. Amphibians are in trouble because their habitat is being destroyed as trees are being cut down to make room for farms and roads. Amphibians also absorb pollution easily, because they breathe through their skin. Amphibians are usually the first to disappear when an environment is under threat from pollution. Due to pollution, some frogs are born with deformed, or wrongly shaped, body parts, such as extra legs and eyes. Frogs with deformed body parts are a clue for scientists that an environment is suffering. Between the destruction of their habitats and risks to frogs from pollution, frogs are at risk of endangerment and extinction. Scientists are working to save amphibians from their plight. Scientists want the government to pass laws that protect amphibian habitats and limit pollution.
Passage 2
My name is Maria and I am an amphibian conservation biologist. My job is to protect amphibians and their natural habitats, develop educational programs and exhibits to engage the public about amphibian conservation, and research to develop tools that will allow scientists to reintroduce amphibians back into the wild. Conservation biologists are scientists who study and protect animals and their environments. I work in a zoo, but I often travel to places like Ecuador or Brazil to observe a variety of amphibians in their natural habitats. Brazil, for example, has 1,022 different types of frogs, toads, and salamanders! In my work at the zoo, I specialize in only a small portion of that number. Here in the zoo, we have many amphibians in our care because some or all of their natural habitats were destroyed. We are not alone in our work to protect amphibians. Many people, in many kinds of jobs, are helping protect amphibians and their habitats. I partner with other scientists and lawyers, like my friend Fernanda, to help create laws that best support the conservation, or protection, of amphibians. Fernanda is an environmental lawyer who works to create laws like the Endangered Species Act that protect wildlife and their homes. She, in turn, needs to partner with government workers who can lobby and vote to help get laws passed. Together, our goal is to work together to build a world where these amphibians have a safe space to live outside of the zoo, in their natural habitat, protected from pollution or loss of space. We are working with a facility in Brazil to build protected space for amphibians to be released from the zoo and into a place where they can thrive.
What reasons and/or evidence does the author provide to support the main points in passage 1?
This is an example of evidence the author uses to support the point that pollution is harmful to amphibians.
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Passage 1
Ecuador, in South America, is home to 417 types of frogs and toads. Many of these species, or types of frogs, are at risk of dying out. In the last 50 years, many amphibian species have gone extinct. Salamanders, frogs, and toads are all amphibians. Amphibians are animals that spend part of their life in water and part on land and have backbones. Amphibians must live near water. Amphibians are in trouble because their habitat is being destroyed as trees are being cut down to make room for farms and roads. Amphibians also absorb pollution easily, because they breathe through their skin. Amphibians are usually the first to disappear when an environment is under threat from pollution. Due to pollution, some frogs are born with deformed, or wrongly shaped, body parts, such as extra legs and eyes. Frogs with deformed body parts are a clue for scientists that an environment is suffering. Between the destruction of their habitats and risks to frogs from pollution, frogs are at risk of endangerment and extinction. Scientists are working to save amphibians from their plight. Scientists want the government to pass laws that protect amphibian habitats and limit pollution.
Passage 2
My name is Maria and I am an amphibian conservation biologist. My job is to protect amphibians and their natural habitats, develop educational programs and exhibits to engage the public about amphibian conservation, and research to develop tools that will allow scientists to reintroduce amphibians back into the wild. Conservation biologists are scientists who study and protect animals and their environments. I work in a zoo, but I often travel to places like Ecuador or Brazil to observe a variety of amphibians in their natural habitats. Brazil, for example, has 1,022 different types of frogs, toads, and salamanders! In my work at the zoo, I specialize in only a small portion of that number. Here in the zoo, we have many amphibians in our care because some or all of their natural habitats were destroyed. We are not alone in our work to protect amphibians. Many people, in many kinds of jobs, are helping protect amphibians and their habitats. I partner with other scientists and lawyers, like my friend Fernanda, to help create laws that best support the conservation, or protection, of amphibians. Fernanda is an environmental lawyer who works to create laws like the Endangered Species Act that protect wildlife and their homes. She, in turn, needs to partner with government workers who can lobby and vote to help get laws passed. Together, our goal is to work together to build a world where these amphibians have a safe space to live outside of the zoo, in their natural habitat, protected from pollution or loss of space. We are working with a facility in Brazil to build protected space for amphibians to be released from the zoo and into a place where they can thrive.
Do the reasons and evidence provided in the article support the points the author of passage 1 is making about frogs being at risk?
The reasons provided in Passage 1 support the main points about risks to amphibians.
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Passage 1
Ecuador, in South America, is home to 417 types of frogs and toads. Many of these species, or types of frogs, are at risk of dying out. In the last 50 years, many amphibian species have gone extinct. Salamanders, frogs, and toads are all amphibians. Amphibians are animals that spend part of their life in water and part on land and have backbones. Amphibians must live near water. Amphibians are in trouble because their habitat is being destroyed as trees are being cut down to make room for farms and roads. Amphibians also absorb pollution easily, because they breathe through their skin. Amphibians are usually the first to disappear when an environment is under threat from pollution. Due to pollution, some frogs are born with deformed, or wrongly shaped, body parts, such as extra legs and eyes. Frogs with deformed body parts are a clue for scientists that an environment is suffering. Between the destruction of their habitats and risks to frogs from pollution, frogs are at risk of endangerment and extinction. Scientists are working to save amphibians from their plight. Scientists want the government to pass laws that protect amphibian habitats and limit pollution.
Passage 2
My name is Maria and I am an amphibian conservation biologist. My job is to protect amphibians and their natural habitats, develop educational programs and exhibits to engage the public about amphibian conservation, and research to develop tools that will allow scientists to reintroduce amphibians back into the wild. Conservation biologists are scientists who study and protect animals and their environments. I work in a zoo, but I often travel to places like Ecuador or Brazil to observe a variety of amphibians in their natural habitats. Brazil, for example, has 1,022 different types of frogs, toads, and salamanders! In my work at the zoo, I specialize in only a small portion of that number. Here in the zoo, we have many amphibians in our care because some or all of their natural habitats were destroyed. We are not alone in our work to protect amphibians. Many people, in many kinds of jobs, are helping protect amphibians and their habitats. I partner with other scientists and lawyers, like my friend Fernanda, to help create laws that best support the conservation, or protection, of amphibians. Fernanda is an environmental lawyer who works to create laws like the Endangered Species Act that protect wildlife and their homes. She, in turn, needs to partner with government workers who can lobby and vote to help get laws passed. Together, our goal is to work together to build a world where these amphibians have a safe space to live outside of the zoo, in their natural habitat, protected from pollution or loss of space. We are working with a facility in Brazil to build protected space for amphibians to be released from the zoo and into a place where they can thrive.
How do these reasons and evidence in passage 1 help the reader understand the points the author makes about risks to amphibians?
The reasons and evidence in the article help give examples for the reader to understand the effects of pollution and construction on amphibians.
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Passage 1
Ecuador, in South America, is home to 417 types of frogs and toads. Many of these species, or types of frogs, are at risk of dying out. In the last 50 years, many amphibian species have gone extinct. Salamanders, frogs, and toads are all amphibians. Amphibians are animals that spend part of their life in water and part on land and have backbones. Amphibians must live near water. Amphibians are in trouble because their habitat is being destroyed as trees are being cut down to make room for farms and roads. Amphibians also absorb pollution easily, because they breathe through their skin. Amphibians are usually the first to disappear when an environment is under threat from pollution. Due to pollution, some frogs are born with deformed, or wrongly shaped, body parts, such as extra legs and eyes. Frogs with deformed body parts are a clue for scientists that an environment is suffering. Between the destruction of their habitats and risks to frogs from pollution, frogs are at risk of endangerment and extinction. Scientists are working to save amphibians from their plight. Scientists want the government to pass laws that protect amphibian habitats and limit pollution.
Passage 2
My name is Maria and I am an amphibian conservation biologist. My job is to protect amphibians and their natural habitats, develop educational programs and exhibits to engage the public about amphibian conservation, and research to develop tools that will allow scientists to reintroduce amphibians back into the wild. Conservation biologists are scientists who study and protect animals and their environments. I work in a zoo, but I often travel to places like Ecuador or Brazil to observe a variety of amphibians in their natural habitats. Brazil, for example, has 1,022 different types of frogs, toads, and salamanders! In my work at the zoo, I specialize in only a small portion of that number. Here in the zoo, we have many amphibians in our care because some or all of their natural habitats were destroyed. We are not alone in our work to protect amphibians. Many people, in many kinds of jobs, are helping protect amphibians and their habitats. I partner with other scientists and lawyers, like my friend Fernanda, to help create laws that best support the conservation, or protection, of amphibians. Fernanda is an environmental lawyer who works to create laws like the Endangered Species Act that protect wildlife and their homes. She, in turn, needs to partner with government workers who can lobby and vote to help get laws passed. Together, our goal is to work together to build a world where these amphibians have a safe space to live outside of the zoo, in their natural habitat, protected from pollution or loss of space. We are working with a facility in Brazil to build protected space for amphibians to be released from the zoo and into a place where they can thrive.
What are the author’s main points in Passage 2?
All three of the choices listed are the main points given in Passage 2.
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Passage 1
Ecuador, in South America, is home to 417 types of frogs and toads. Many of these species, or types of frogs, are at risk of dying out. In the last 50 years, many amphibian species have gone extinct. Salamanders, frogs, and toads are all amphibians. Amphibians are animals that spend part of their life in water and part on land and have backbones. Amphibians must live near water. Amphibians are in trouble because their habitat is being destroyed as trees are being cut down to make room for farms and roads. Amphibians also absorb pollution easily, because they breathe through their skin. Amphibians are usually the first to disappear when an environment is under threat from pollution. Due to pollution, some frogs are born with deformed, or wrongly shaped, body parts, such as extra legs and eyes. Frogs with deformed body parts are a clue for scientists that an environment is suffering. Between the destruction of their habitats and risks to frogs from pollution, frogs are at risk of endangerment and extinction. Scientists are working to save amphibians from their plight. Scientists want the government to pass laws that protect amphibian habitats and limit pollution.
Passage 2
My name is Maria and I am an amphibian conservation biologist. My job is to protect amphibians and their natural habitats, develop educational programs and exhibits to engage the public about amphibian conservation, and research to develop tools that will allow scientists to reintroduce amphibians back into the wild. Conservation biologists are scientists who study and protect animals and their environments. I work in a zoo, but I often travel to places like Ecuador or Brazil to observe a variety of amphibians in their natural habitats. Brazil, for example, has 1,022 different types of frogs, toads, and salamanders! In my work at the zoo, I specialize in only a small portion of that number. Here in the zoo, we have many amphibians in our care because some or all of their natural habitats were destroyed. We are not alone in our work to protect amphibians. Many people, in many kinds of jobs, are helping protect amphibians and their habitats. I partner with other scientists and lawyers, like my friend Fernanda, to help create laws that best support the conservation, or protection, of amphibians. Fernanda is an environmental lawyer who works to create laws like the Endangered Species Act that protect wildlife and their homes. She, in turn, needs to partner with government workers who can lobby and vote to help get laws passed. Together, our goal is to work together to build a world where these amphibians have a safe space to live outside of the zoo, in their natural habitat, protected from pollution or loss of space. We are working with a facility in Brazil to build protected space for amphibians to be released from the zoo and into a place where they can thrive.
What reasons or evidence does the author provide to support the main points in passage 2?
All three of the choices listed are the reasons and evidence given in Passage 2.
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What is the purpose of informational text?
Informational text is written to explain or inform the reader.
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Which of the following is NOT an example of something written to inform?
Advertisements are written to sell something, not to give a reader information.
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Read the title and decide whether the piece was written to inform, entertain, or persuade.
"The Adventures of Super Sam in Space"
This is likely written to entertain the reader.
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Read the title and decide whether the piece was written to inform, entertain, or persuade.
"10 Things You Should Know About Germs"
This is likely written to inform the reader.
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You likely hear the name “Napoleon Bonaparte” and immediately think of the short in stature and short in temper French emperor. But have you heard about his most embarrassing surrender? No, not Waterloo! Not Laon or the battle of La Rothiere either! Napoleon's most laughable defeat came well before his loss at Waterloo, in the summer of 1807.
Despite Napoleon's great renown as a brilliant military leader, he once retreated frantically from an army of ….bunnies! You heard that right! Shortly after Napoleon’s Treaties of Tilsit was penned, the emperor planned to celebrate with his fellow military men the best way he knew how - a hunt! Napoleon ordered the chief of staff, Alexandre Berthier, to organize an extravagant rabbit hunt for Napoleon and his men.
Not to be outdone, Berthier collected what was estimated to be between hundreds and thousands of rabbits for the hunt. However, while Berthier assumed that, like wild rabbits, these village-raised rabbits would scurry at the sight of Napoleon and his men, exactly the opposite was true. When the day came, and the hunting party was ready for the chase, the bunnies were released. But instead of running for the woods, the swarm of rabbits came straight for Napoleon and his men. Though the men initially attempted to fight back, they were overwhelmed by the hoard and fled to their coaches on a panicked retreat. It was not until the coaches sped away, rabbits still hopping aboard even as they attempted to retreat, that Napoleon could escape the furry army.
Embarrassed in front of the military peers and subordinates who once respected him, Napoleon fled home from a battle he never anticipated, and one he would never fully recover from the battle of the bunnies.
According to the passage, who was ordered to organize the rabbit hunt?
This question is asking for a detail from the passage. At the end of the second paragraph, the author claims that Alexandre Berthier was ordered to organize the rabbit hunt. “Napoleon ordered the chief of staff, Alexandre Berthier, to organize an extravagant rabbit hunt for Napoleon and his men.”
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You likely hear the name “Napoleon Bonaparte” and immediately think of the short in stature and short in temper French emperor. But have you heard about his most embarrassing surrender? No, not Waterloo! Not Laon or the battle of La Rothiere either! Napoleon's most laughable defeat came well before his loss at Waterloo, in the summer of 1807.
Despite Napoleon's great renown as a brilliant military leader, he once retreated frantically from an army of ….bunnies! You heard that right! Shortly after Napoleon’s Treaties of Tilsit was penned, the emperor planned to celebrate with his fellow military men the best way he knew how - a hunt! Napoleon ordered the chief of staff, Alexandre Berthier, to organize an extravagant rabbit hunt for Napoleon and his men.
Not to be outdone, Berthier collected what was estimated to be between hundreds and thousands of rabbits for the hunt. However, while Berthier assumed that, like wild rabbits, these village-raised rabbits would scurry at the sight of Napoleon and his men, exactly the opposite was true. When the day came, and the hunting party was ready for the chase, the bunnies were released. But instead of running for the woods, the swarm of rabbits came straight for Napoleon and his men. Though the men initially attempted to fight back, they were overwhelmed by the hoard and fled to their coaches on a panicked retreat. It was not until the coaches sped away, rabbits still hopping aboard even as they attempted to retreat, that Napoleon could escape the furry army.
Embarrassed in front of the military peers and subordinates who once respected him, Napoleon fled home from a battle he never anticipated, and one he would never fully recover from the battle of the bunnies.
According to the passage, the rabbit hunt occurred shortly after the signing of which agreements?
This question is asking for a detail from the passage. In the middle of the second paragraph, the author claims that the hunt was shortly after the Treaties of Tilsit. “Shortly after Napoleon’s Treaties of Tilsit was penned, the emperor planned to celebrate with his fellow military men the best way he knew how - a hunt!”
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Every day it seems, new inventions surface that promise to add value to our day-to-day lives. But did you know, many of the inventions we interact with on a daily basis were developed completely by accident?
Take the microwave, for instance. This accidental invention was developed by engineer Percy Spencer who, upon experimenting with a microwave-emitting magnetron, found that the candy bar in his pocket had begun to melt. Spencer was then able to harness this radiation into the microwave we use today to make snack time a speedy process!
Perhaps one of the most well-known accidental inventions of today, the potato chip was born when a customer kept requesting that his french fries be sliced thinner and made crispier. Though chef George Crum responded with the chips as a joke, they quickly became a favorite snack around the world!
Even the match is a result of accidental invention. When pharmacist John Walker was stirring chemicals, he noticed that the end of his stirring stick had dried into a hardened lump. When attempting to scrape the dried residue off, a flame sparked, and so did Walker’s idea to turn this accident into a helpful tool!
So, the next time your science experiment doesn’t go as planned, or you burn what you have cooked on the stove, keep in mind that some of today’s most valued inventions were discovered when the inventor least expected it!
According to the passage, who invented the potato chip?
This question is asking for a detail from the passage. In the third paragraph, the author explains how George Crum initially created the potato chip as a joke. “Though chef George Crum responded with the chips as a joke, they quickly became a favorite around the world!”
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Every day it seems, new inventions surface that promise to add value to our day-to-day lives. But did you know, many of the inventions we interact with on a daily basis were developed completely by accident?
Take the microwave, for instance. This accidental invention was developed by engineer Percy Spencer who, upon experimenting with a microwave-emitting magnetron, found that the candy bar in his pocket had begun to melt. Spencer was then able to harness this radiation into the microwave we use today to make snack time a speedy process!
Perhaps one of the most well-known accidental inventions of today, the potato chip was born when a customer kept requesting that his french fries be sliced thinner and made crispier. Though chef George Crum responded with the chips as a joke, they quickly became a favorite snack around the world!
Even the match is a result of accidental invention. When pharmacist John Walker was stirring chemicals, he noticed that the end of his stirring stick had dried into a hardened lump. When attempting to scrape the dried residue off, a flame sparked, and so did Walker’s idea to turn this accident into a helpful tool!
So, the next time your science experiment doesn’t go as planned, or you burn what you have cooked on the stove, keep in mind that some of today’s most valued inventions were discovered when the inventor least expected it!
According to the passage, what was John Walker doing when a flame sparked and helped him to create the match?
This question is asking for a detail from the passage. In the fourth paragraph, the author explains how John Walker was trying to scrape chemicals off of a stick when it sparked a flame. “When pharmacist John Walker was stirring chemicals, he noticed that the end of his stirring stick had dried into a hardened lump. When attempting to scrape the dried residue off, a flame sparked, and so did Walker’s idea to turn this accident into a helpful tool!”
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Exactly how domesticated dogs came to North America is uncertain. What is reasonably sure, however, is that dogs were domesticated from wolves at least twice in two different locations and that native American dogs were not domesticated in North America, but in Asia, migrating to the North American continent only 10,000 years ago - thousands of years after humans first arrived on the continent. Archaeologists have determined this by examining DNA.
DNA studies and archaeological findings in Alaska suggest that dogs migrated from Siberia to the Americas with a wave of humans crossing the land bridge, spreading out as those humans settled. The dogs coexisted among humans as companions, pets, and (occasionally) food until Europeans arrived. At that time, native American dogs seem to have almost completely vanished, although the exact reason for their disappearance is unclear. Disease and forced cultural exchange likely led to the decline of the native American dog.
According to the passages, what caused the reduction of native American dogs?
The reduction of native American dogs was believed to be a combination of disease and forced cultural exchange. When the Europeans arrived, they would have brought new diseases that the native dogs had no immunity to. The dogs also would be breeding with European dogs or exchanged as bartering pieces or currency causing a reduction in the population.
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