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BIO 1000 WEEK 6 ECOLOGY INQUISITIVE CHAPTER 18 COMPLETE QUESTIONS WITH REAL ANSWERS LATES, Quizzes of Biology

A population is a group of individuals belonging to - species that interact with one another. The total number of individuals in a population is the - . On the other hand, the number of individuals per unit area is the - . - ANS-one poluation size population density A population of 200 deer is reintroduced to a forest after many years of being absent. This population is tracked for the next 50 years. Based on the following data of the first 50 years, and assuming that there is no resource limitation, how many deer would you expect to find in this population 60 years after their introduction? - ANS-1,600 deers A population of 350 ants inhabits a single tree in a forest. One hundred of the ants migrate to a nearby tree but remain in the same population. No new ants are produced in this process. Which of the following measures changed when the ants invaded the new tree? - ANS-population density A population of deep sea crabs lives in marine worm burrows and eats decaying matter fa

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Download BIO 1000 WEEK 6 ECOLOGY INQUISITIVE CHAPTER 18 COMPLETE QUESTIONS WITH REAL ANSWERS LATES and more Quizzes Biology in PDF only on Docsity! BIO 1000 WEEK 6 ECOLOGY INQUISITIVE CHAPTER 18 COMPLETE QUESTIONS WITH REAL ANSWERS LATEST 2024 (ALREADY GRADED A+) - ANS- A population is a group of individuals belonging to - species that interact with one another. The total number of individuals in a population is the - . On the other hand, the number of individuals per unit area is the - . - ANS-one poluation size population density A population of 200 deer is reintroduced to a forest after many years of being absent. This population is tracked for the next 50 years. Based on the following data of the first 50 years, and assuming that there is no resource limitation, how many deer would you expect to find in this population 60 years after their introduction? - ANS-1,600 deers A population of 350 ants inhabits a single tree in a forest. One hundred of the ants migrate to a nearby tree but remain in the same population. No new ants are produced in this process. Which of the following measures changed when the ants invaded the new tree? - ANS-population density A population of deep sea crabs lives in marine worm burrows and eats decaying matter falling from shallow-water biological communities above. Which of the following would likely decrease the carrying capacity of these seafloor crabs? - ANS-pollution disrupting the shallow-water biological communities above the crab habitat invation of a fish that preys on worms A population of paramecia grows from 16 to 64 in six days. What is the doubling time for this population? - ANS-3 days A population of paramecia grows from 16 to 128. How many generations, or doubling times, has this population undergone? - ANS-3 A population size can be much lower than the carrying capacity for an extended period of time. - ANS-t Among the four populations described below, which has the largest population size, and which has the largest population density? Each Selection is only used once. - ANS-large populations size: A population 200 frogs living in a 200 square foot pond large population density: A population of 50 ants living in a one square foot burrow Based on the graph below of a population of goats over the 50 years since they were introduced to an island, what is the likely carrying capacity of the island for the goats? - ANS-300 Consider a population of birds, living in a forest, that nest within the branches of oak trees and feed on beetles and earthworms. Which of the following would likely reduce the carrying capacity of the birds? - ANS-introducing to the forest a rodent species that eats earthworms cutting down oak trees in the forest Determine whether the following conditions will increase or decrease a population of mountain lions (predators). - ANS-A deer population doubles from the previous year due to a prolonged plant growth season and abundant foliage for grazing. A local neighborhood boy releases a pair of rabbits into the wild. They reproduce rapidly and dramatically increase the rabbit population in the area. Determine whether the following conditions will increase or decrease carrying capacity for the given population. - ANS-Members of a local nonprofit organization add large woody debris to a local stream, providing more locations for salmon and trout to hide, feed, and breed. A researcher triples the number of bird boxes in an area populated by blue birds, obligate cavity nesters that cannot make their own cavities and rely on vacant cavities for nesting. During logistic population growth, the population grows freely with no constraints. - ANS-f Every few decades, extremely low tides lead to coral reefs becoming exposed to the dry air and sun. Which of the following statements regarding extremely low tides is likely to be true? - ANS-The low tides result in a density-independent population change. The population size of corals is likely to decrease as a result of these events. For a given population, population density is always a larger number than population size. - ANS-f If Canadian lynx were bred in captivity and released into the wild, the hare population would be expected to decrease in response. - ANS-true If the number of voles dramatically increases, which of the following may also increase? - ANS- red fox, cayote, grey wolf Match each label with the description or figure it is best associated with. - ANS-logistic growth: blue graph and At some point in time, the rate of population growth begins to slow down. exponential growth: red graph and The rate of population growth continually increases. Most habitats can sustain a population size that is much higher the carrying capacity for an extended period of time. - ANS-f Populations of small size can have high population densities. - ANS-t Predation rates on a population often increase as population density increases because many predators prefer to hunt food sources with higher abundance. - ANS-t predation Which of the following are population density-dependent factors? - ANS-inatably to find mates Which of the following is correct regarding genetically modified ("friendly") Aedes aegypti? - ANS-Since the carrying capacity remains unchanged, a species other than Aedes aegypti may possibly increase in numbers. The population decrease in GM Aedes aegypti is unrelated to carrying capacity. Which of the following measures would be affected by adding 100 individuals to a population of birds that inhabits an entire small island? - ANS-population density and size Which of the following statements best describes the characteristics of density-dependent population changes? - ANS-... such as competition and predation Which of the following variables affects the carrying capacity of a habitat of burrowing mice? - ANS-amount of resources avablible to mice Which pattern of population growth is affected by the carrying capacity? - ANS-logistical Which phase(s) of mosquito larval growth and/or carrying capacity would be impacted by the release of genetically modified Aedes aegypti? - ANS-middle curving part and the beginning of the line You build a pond in your backyard, and stock the pond with four koi fish. After two years, there are eight koi fish in the pond. What is the doubling time of the koi population in years? - ANS-2 years Zika virus is transmitted from mosquitoes to humans. The graph below describes the growth rate and carrying capacity of humans. Using this information, what number can we infer the carrying capacity of mosquitoes to be? - ANS->10 - ANS- A population is a group of individuals belonging to - species that interact with one another. The total number of individuals in a population is the - . On the other hand, the number of individuals per unit area is the - . - ANS-one poluation size population density A population of 200 deer is reintroduced to a forest after many years of being absent. This population is tracked for the next 50 years. Based on the following data of the first 50 years, and assuming that there is no resource limitation, how many deer would you expect to find in this population 60 years after their introduction? - ANS-1,600 deers A population of 350 ants inhabits a single tree in a forest. One hundred of the ants migrate to a nearby tree but remain in the same population. No new ants are produced in this process. Which of the following measures changed when the ants invaded the new tree? - ANS-population density A population of deep sea crabs lives in marine worm burrows and eats decaying matter falling from shallow-water biological communities above. Which of the following would likely decrease the carrying capacity of these seafloor crabs? - ANS-pollution disrupting the shallow-water biological communities above the crab habitat invation of a fish that preys on worms A population of paramecia grows from 16 to 64 in six days. What is the doubling time for this population? - ANS-3 days A population of paramecia grows from 16 to 128. How many generations, or doubling times, has this population undergone? - ANS-3 A population size can be much lower than the carrying capacity for an extended period of time. - ANS-t Among the four populations described below, which has the largest population size, and which has the largest population density? Each Selection is only used once. - ANS-large populations size: A population 200 frogs living in a 200 square foot pond large population density: A population of 50 ants living in a one square foot burrow Based on the graph below of a population of goats over the 50 years since they were introduced to an island, what is the likely carrying capacity of the island for the goats? - ANS-300 Consider a population of birds, living in a forest, that nest within the branches of oak trees and feed on beetles and earthworms. Which of the following would likely reduce the carrying capacity of the birds? - ANS-introducing to the forest a rodent species that eats earthworms cutting down oak trees in the forest Determine whether the following conditions will increase or decrease a population of mountain lions (predators). - ANS-A deer population doubles from the previous year due to a prolonged plant growth season and abundant foliage for grazing. A local neighborhood boy releases a pair of rabbits into the wild. They reproduce rapidly and dramatically increase the rabbit population in the area. Determine whether the following conditions will increase or decrease carrying capacity for the given population. - ANS-Members of a local nonprofit organization add large woody debris to a local stream, providing more locations for salmon and trout to hide, feed, and breed. A researcher triples the number of bird boxes in an area populated by blue birds, obligate cavity nesters that cannot make their own cavities and rely on vacant cavities for nesting. During logistic population growth, the population grows freely with no constraints. - ANS-f Every few decades, extremely low tides lead to coral reefs becoming exposed to the dry air and sun. Which of the following statements regarding extremely low tides is likely to be true? - ANS-The low tides result in a density-independent population change. The population size of corals is likely to decrease as a result of these events. For a given population, population density is always a larger number than population size. - ANS-f If Canadian lynx were bred in captivity and released into the wild, the hare population would be expected to decrease in response. - ANS-true If the number of voles dramatically increases, which of the following may also increase? - ANS- red fox, cayote, grey wolf Match each label with the description or figure it is best associated with. - ANS-logistic growth: blue graph and At some point in time, the rate of population growth begins to slow down. exponential growth: red graph and The rate of population growth continually increases. Most habitats can sustain a population size that is much higher the carrying capacity for an extended period of time. - ANS-f Populations of small size can have high population densities. - ANS-t Predation rates on a population often increase as population density increases because many predators prefer to hunt food sources with higher abundance. - ANS-t Severe weather conditions are more likely to be caused by populations with high population density. - ANS-f Single-celled organisms that reproduce rapidly are excellent models of population growth. Using laboratory growth media, a population of paramecia first experiences - growth, which occurs when a population increases by a constant proportion over a constant time interval. This type of growth is represented by a(n) - growth curve. However, as resources become limited, growth slows and levels off as the population reaches - . This type of growth, in which the paramecia experience exponential growth at first but then stabilize at the maximum population size that can be sustained by the culture media, is called - growth and is represented by a(n) - growth curve. - ANS-exponential, J-shaped, carrying capacity, logistic, S-shaped Suppose the size of a population doubles. What is required for the density to double as well? - ANS-the areas that population occupys must not change The amount of time needed for a population to double in size is called generation time. Based on this graph, the generation time for the Earth's eagle population is approximately how many years? (Round to the nearest number ending in 0 or 5.) - ANS-10 Which phase(s) of mosquito larval growth and/or carrying capacity would be impacted by the release of genetically modified Aedes aegypti? - ANS-middle curving part and the beginning of the line You build a pond in your backyard, and stock the pond with four koi fish. After two years, there are eight koi fish in the pond. What is the doubling time of the koi population in years? - ANS-2 years Zika virus is transmitted from mosquitoes to humans. The graph below describes the growth rate and carrying capacity of humans. Using this information, what number can we infer the carrying capacity of mosquitoes to be? - ANS->10 Based on the data in the following graph, if carbon dioxide concentrations continue at the current trajectory, which is the best estimate of atmospheric CO2 concentration in 2040? https://ncia.wwnorton.com/media/57f7e5595e4ef6e50579a9d1/Inq_BN2_18.4- 13_BioNow2E_1808.jpg - ANS-450 ppm At the current trajectory, CO2 concentrations will likely reach 450 ppm sometime before 2050. biosphere - ANS-The biosphere consists of allall of Earth's organisms and the physical space that they inhabit. It is the source of many of the resources that sustain human society, like oxygen. The activity of humans impacts natural ecosystems, such as the Amazon rainforest, where much of the land has been turned into farms. biotic and abiotic factors - ANS-Ecosystems are influenced by both biotic factors, which are the biological components of ecosystems, and abiotic factors, which are the nonliving components of ecosystems. Biotic factors include microbes, and abiotic factors include rainfall. consequences of climate change - ANS-Short-term atmospheric conditions, such as whether it rains today, are called weather. On the other hand, climate describes the long-term trends in atmospheric conditions, usually over a period of decades. Due primarily to human activities, many of these long-term trends have changed over the past century, resulting in far-reaching consequences, such as the reduction of freshwater glaciers and a rise in sea level. Dark colored surfaces absorb more solar radiation than light colored surfaces. If global warming results in complete melting of the white Arctic sea ice, what effect should that have on Arctic Ocean temperatures? - ANS-It should increase the Arctic Ocean temperature even more. Indeed, the temperature of the Arctic ocean is expected to increase faster than many other regions of Earth because the dark blue liquid ocean will absorb more heat than when it was white frozen ocean. False - ANS-Biotic factors can increase or decrease growth of biological populations, but abiotic factors can only increase biological growth. False - ANS-Global warming is largely caused by a change in the angle at which sunlight strikes the planet. In the image, identify where gases that absorb and reemit the sun's warmth back to Earth accumulate. - ANS-Earth's gravity helps keep gases such as carbon dioxide and methane trapped in the atmospheric layers, where they absorb and reemit the sun's warmth back to Earth. Increased fire frequency in the Amazon rainforest is likely to cause which of the following? Drought and increased fire frequency contribute to deforestation of the Amazon. - ANS-Correct answer: increase in atmospheric CO2 emission Burning of forest timber releases CO2 and other greenhouse gases to the atmosphere. exacerbation or worsening of climate change Loss of rainforest and increases in CO2 emission enhance the impact of global climate change. loss of forested area Deforestation is frequently caused by drought and fire frequency in the Amazon rainforest. Incorrect answer: increase in forest productivity Increased fire frequency leads to deforestation and decreased productivity. increase in agricultural productivity Although the loss of forest may make more agricultural land available, this land may or may not be used for agriculture and does not necessarily increase productivity. Sometimes burning can boost agricultural productivity, as in the biochar found in "terra preta" soils in South America. However, the soil's chemical and biological properties are also disrupted, which can sometimes have an adverse impact. The atmospheric concentration of carbon dioxide has markedly increased in recent decades. Which of the following mechanisms have led to this increase in atmospheric CO2? - ANS- Correct Answer: burning of fossil fuels Burning fossil fuels, which are made of carbon dioxide, contributes about 75% of the yearly increase in atmospheric CO2. Destruction of forests Destruction of forests, which store carbon dioxide, contributes about 25% of the yearly increase in atmospheric CO2. Incorrect Answer: Rising sea levels Rising sea levels are caused by the increase in atmospheric carbon dioxide, not the reverse. Global warming Global warming is caused by the increase in atmospheric carbon dioxide, not the reverse. The average global temperature (shown in this graph) roughly reflects the change in average greenhouse gas concentrations over the last ~150 years. Based on this graph, in approximately what year would greenhouse gas concentrations have been the highest? https://ncia.wwnorton.com/media/57f7e5595e4ef6e50579a9d1/Inq_BN2_18.4- 12_BioNow2E_1809.jpg - ANS-2016 2016 has the highest average global temperature in the graph at approximately 58.7°F. Thus, one can deduce that greenhouse gas concentrations would have been the highest as well. True - ANS-Changes in the angle at which sunlight strikes the planet are responsible for the regional differences in temperatures and those among different seasons, but they are not responsible for long-term increases in global temperature. True - ANS-Populations are adapted to their environments. Therefore, a change in almost any abiotic factor, for instance the environment becoming too cold, too hot, or too salty, could damage a population to some extent. True - ANS-The water cycle also contributes greenhouse gas to the atmosphere. Water vapor is a greenhouse gas, so transpiration and evaporation contribute greenhouse gas. water and carbon cycles - ANS-Both the water cycle, or hydrologic cycle, and the carbon cycle consist of the movement of a substance back and forth between the sky and land. In the water cycle, evaporation transports water from the Earth into the atmosphere, and precipitation transports water back to the Earth. In the carbon cycle, respiration transports carbon into the atmosphere, and photosynthesis transports it back to the Earth. In addition, the burning of fossil fuels transports carbon to the atmosphere. Which of the following are a part of the biosphere? The biosphere includes all of Earth's species and the physical space they occupy, which includes water, soil, and the CO2 in the atmosphere. - ANS-Soil in a forest Soil in a forest is a part of the biosphere. CO2 in the atmosphere CO2 in the atmosphere is a part of the biosphere. Water in a river Water in a river is a part of the biosphere. Frogs in a pond Frogs in a pond are a part of the biosphere. heavy spring rains and dry summers extreme flooding during a hurricane Climate: warmer average air temperatures since 1910 increases in frequency of flooding in the past century A population is a group of individuals belonging to 1 species that interact with one another. The total number of individuals in a population is the 2. On the other hand, the number of individuals per unit area is the 3. - ANS-1. one 2. population size 3. population density A population of 200 deer is reintroduced to a forest after many years of being absent. This population is tracked for the next 50 years. Based on the following data of the first 50 years, and assuming that there is no resource limitation, how many deer would you expect to find in this population 60 years after their introduction? - ANS-1600 deer A population of deep sea crabs lives in marine worm burrows and eats decaying matter falling from shallow-water biological communities above. Which of the following would likely decrease the carrying capacity of these seafloor crabs? - ANS-Pollution disrupting the shallow-water biological communities above the crab habitat invasion of a fish that preys on the worms. A population of paramecia grows from 16 to 64 in six days. What is the doubling time for this population? - ANS-3 days A population of paramecia grows from 16 to 128. How many generations, or doubling times, has this population undergone? - ANS-3 generations Aedes aegypti mosquitoes can transmit the Zika virus. Researchers have genetically modified the Aedes aegypti mosquito so that it dies in the larval stage and is unable to transmit the Zika virus. Which phase(s) of mosquito larval growth and/or carrying capacity would be impacted by the release of genetically modified Aedes aegypti? - ANS-click the top of the s curve click the bottom of the s curve Aedes aegypti mosquitoes can transmit the Zika virus. Researchers have genetically modified the Aedes aegypti mosquito so that it dies in the larval stage and is unable to transmit the Zika virus.Which of the following is correct regarding genetically modified ("friendly") Aedes aegypti? - ANS-The population decrease in GM Aedes aegypti is unrelated to carrying capacity. Since the Carrying capacity remains unchnged, a species other than Aedes aegypti may possibly increase in numbers. Based on the graph below of a population of goats over the 50 years since they were introduced to an island, what is the likely carrying capacity of the island for the goats? - ANS-300 Consider a population of birds, living in a forest, that nest within the branches of oak trees and feed on beetles and earthworms. Which of the following would likely reduce the carrying capacity of the birds? - ANS-Introducing to the forest a rodent species that eats earth worms. cutting down oak trees in the forest. Determine whether the following conditions will increase or decrease a population of mountain lions (predators). - ANS-A local neighborhood boy releases a pair of rabbits into the wild. They reproduce rapidly and dramatically increase the rabbit population in the area. A deer population doubles from the previous year due to a prolonged plant growth season and abundant foliage for grazing. If the number of voles dramatically increases, which of the following may also increase? - ANS- Coyote Red fox Grey wolf Match each label with the description or figure it is best associated with. Fig 1 (red line) Fig 2 (blue line) - ANS-Exponential growth: -Fig 1 - "The rate of population growth continually increases." Logistic growth: -Fig 2 - "At some point in time, the rate of population growth begins to slow down." Single-celled organisms that reproduce rapidly are excellent models of population growth. Using laboratory growth media, a population of paramecia first experiences 1, which occurs when a population increases by a constant proportion over a constant time interval. This type of growth is represented by a(n) 2 growth curve. However, as resources become limited, growth slows and levels off as the population reaches 3. This type of growth, in which the paramecia experience exponential growth at first but then stabilize at the maximum population size that can be sustained by the culture media, is called 4 and is represented by a(n) 5 growth curve. - ANS-1. exponential 2. j-shaped 3. carrying capacity 4. logistic 5. s-shaped Suppose the size of a population doubles. What is required for the density to double as well? - ANS-The area that the population occupies must not change. The amount of time needed for a population to double in size is called generation time. Based on this graph, the generation time for the Earth's eagle population is approximately how many years? (Round to the nearest number ending in 0 or 5.) - ANS-10 years The doubling time of a population of spiders is 1 month. A hypothetical population starts out with 100 individuals. Assuming that there is no resource limitation, how many months would it take until there are 400 spiders in the population? - ANS-2 months The figure below shows a view from above of two natural populations, 1 and 2. The individuals in both populations are indicated by red dots, and the area of the four square grid shown for the two populations is the same. Which of the following statements regarding these two populations is true? - ANS-The size of populations 1 and 2 is the same, but the density of population 1 is higher. The figure below shows the growth of the global human population. Which of the following statements regarding this pattern is true? - ANS-Current human population growth is exponential. Earth's carrying capacity for humans may be above the current human population size. The size of natural populations can 1. These changes can be caused by a variety of factors. For example, when the death rate of a population increases, the population size is likely to 2. The death rate of a population is influenced by the available resources in a population, which is in turn influenced by the 3 and is therefore said to be a 4 factor. Other factors, such as extreme weather events, can also influence population size. These factors are said to be 5 because their occurrence is not brought on by the parameters of the population itself. - ANS-1. fluctuate 2. decrease 3. population density 4. density-dependent 5. density-independent The table below shows the size of a feral cat population in a city over a 40-year period. Does this population exhibit logistic or exponential growth? - ANS-Logistic The table below shows the size of a population of palm trees in a swamp over a 25-year period. What is the doubling time of this population in years? - ANS-10 years Under which circumstances will a population be most likely to exhibit logistic growth? - ANS- When resources are scarce Watch the animation... What shape of curve describes free, unconstrained population growth? - ANS-J-shaped However, the soil's chemical and biological properties are also disrupted, which can sometimes have an adverse impact. The atmospheric concentration of carbon dioxide has markedly increased in recent decades. Which of the following mechanisms have led to this increase in atmospheric CO2? - ANS- Correct Answer: burning of fossil fuels Burning fossil fuels, which are made of carbon dioxide, contributes about 75% of the yearly increase in atmospheric CO2. Destruction of forests Destruction of forests, which store carbon dioxide, contributes about 25% of the yearly increase in atmospheric CO2. Incorrect Answer: Rising sea levels Rising sea levels are caused by the increase in atmospheric carbon dioxide, not the reverse. Global warming Global warming is caused by the increase in atmospheric carbon dioxide, not the reverse. The average global temperature (shown in this graph) roughly reflects the change in average greenhouse gas concentrations over the last ~150 years. Based on this graph, in approximately what year would greenhouse gas concentrations have been the highest? https://ncia.wwnorton.com/media/57f7e5595e4ef6e50579a9d1/Inq_BN2_18.4- 12_BioNow2E_1809.jpg - ANS-2016 2016 has the highest average global temperature in the graph at approximately 58.7°F. Thus, one can deduce that greenhouse gas concentrations would have been the highest as well. True - ANS-Changes in the angle at which sunlight strikes the planet are responsible for the regional differences in temperatures and those among different seasons, but they are not responsible for long-term increases in global temperature. True - ANS-Populations are adapted to their environments. Therefore, a change in almost any abiotic factor, for instance the environment becoming too cold, too hot, or too salty, could damage a population to some extent. True - ANS-The water cycle also contributes greenhouse gas to the atmosphere. Water vapor is a greenhouse gas, so transpiration and evaporation contribute greenhouse gas. water and carbon cycles - ANS-Both the water cycle, or hydrologic cycle, and the carbon cycle consist of the movement of a substance back and forth between the sky and land. In the water cycle, evaporation transports water from the Earth into the atmosphere, and precipitation transports water back to the Earth. In the carbon cycle, respiration transports carbon into the atmosphere, and photosynthesis transports it back to the Earth. In addition, the burning of fossil fuels transports carbon to the atmosphere. Which of the following are a part of the biosphere? The biosphere includes all of Earth's species and the physical space they occupy, which includes water, soil, and the CO2 in the atmosphere. - ANS-Soil in a forest Soil in a forest is a part of the biosphere. CO2 in the atmosphere CO2 in the atmosphere is a part of the biosphere. Water in a river Water in a river is a part of the biosphere. Frogs in a pond Frogs in a pond are a part of the biosphere. Which of the following are greenhouse gases? - ANS-Correct Answer: H2O CH4 Incorrect Answer: C6H12O6 N2 H2O2 Which of the following perpetuate the global warming process, making it more and more intense as time passes? - ANS-Correct Answer: Increased temperatures increase the decomposition of carbon in previously frozen permafrost, releasing CO2 and CH4 to the atmosphere. An increase in temperature leads to more carbon dioxide and methane in the atmosphere, which can reemit even more radiation back to Earth, thereby increasing the temperature even more. Increased temperatures lead to the melting of methane clathrates, which releases methane (CH4) to the atmosphere. An increase in temperature leads to more methane in the atmosphere, which can reemit even more radiation back to Earth, thereby increasing the temperature even more. Water vapor is the most potent greenhouse gas and its concentration increases with temperature, up to the point of water saturation. An increase in temperature leads to generally higher humidity in the atmosphere, which can reemit even more radiation back to Earth, thereby increasing the temperature even more. It also leads to increased precipitation. Incorrect Answer: Increased temperatures lead to increased precipitation and flooding. The increased precipitation may lead to flooding, but it does not directly lead to increased warming on Earth. Thus, it is not a perpetual warming mechanism. Increased temperatures cause polar melting and increase the water table. The water table increase may lead to loss of land, but it does not lead to increased warming on Earth. Thus, it is not a positive feedback (perpetual) mechanism. Which of the following resources, used by humans, are produced by the biosphere? - ANS- Correct Answer: Oxygen Oxygen is produced by Earth's photosynthetic organisms, which are a part of the biosphere. Wood Wood is formed by trees, which are part of the biosphere. Water Water is used, produced, and transported by Earth's organisms, which are a part of the biosphere. Incorrect Answer: Rocks Rocks are produced by Earth's geological processes, which influence the biosphere but are not produced by it. Which of the following statements best defines a greenhouse gas? - ANS-An atmospheric gas that absorbs heat radiating away from the Earth. Greenhouse gases include water vapor, carbon dioxide, and methane. Which of the following types of energy are absorbed by greenhouse gases? - ANS-Correct Answer: solar radiation Greenhouse gases absorb indirect solar radiation that is reemitted from the Earth's surface. Infrared radiation Infrared radiation is reemitted from Earth as a result of the absorption of the sun's radiation. Incorrect Answer: Green energy Green energy is also known as renewable energy and may be collected from natural sources such as wind or solar radiation. light Although the sun emits light, the light is not absorbed by the greenhouse gases.