Economics and Ecology Quiz

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Questions and Answers

How are economics and ecology related?

  • Ecology is primarily concerned with human economic activities.
  • Economics dictates the rules of ecological systems.
  • Economics has no impact on ecological systems.
  • Ecological systems provide essential resources for human economies. (correct)

What is meant by 'sustainable' human economies?

  • Economies focused solely on maximizing production.
  • Economies that can function without harming natural resources. (correct)
  • Economies that depend on constant technological advancement.
  • Economies that actively degrade the environment.

What does resilience in economic systems refer to?

  • The capacity to adapt to global ecological changes. (correct)
  • The tendency to ignore ecological impacts.
  • The focus on short-term gains over long-term stability.
  • The ability to expand without limits.

Which of the following is considered a negative impact of human activity on the environment?

<p>Air pollution due to industrialization and emissions. (C)</p> Signup and view all the answers

What level of ecological organization typically focuses on groups of individuals of the same species?

<p>Population (D)</p> Signup and view all the answers

Why is it important to understand ecology for designing human economies?

<p>To develop economies that are sustainable and resilient. (A)</p> Signup and view all the answers

Which of these is NOT a focus area for ecologists?

<p>Global trade networks (B)</p> Signup and view all the answers

What is a crucial need provided by healthy ecological systems?

<p>Drinkable water. (A)</p> Signup and view all the answers

What term is used to describe gases such as carbon dioxide that trap heat energy in the atmosphere?

<p>Greenhouse gases (A)</p> Signup and view all the answers

What does the model 'Measurable Changes in the Earth System' primarily focus on?

<p>Measurable changes in global systems (C)</p> Signup and view all the answers

Which part of the Earth system includes water in both the atmosphere and geosphere?

<p>Hydrosphere (A)</p> Signup and view all the answers

What type of changes does the model primarily emphasize?

<p>Measurable changes (A)</p> Signup and view all the answers

What role do greenhouse gases play in climate change?

<p>They absorb heat from the sun. (B)</p> Signup and view all the answers

Which component of the Earth system do some scientists consider separately as the cryosphere?

<p>Frozen water such as ice and glaciers (C)</p> Signup and view all the answers

How do scientists utilize the model of measurable changes?

<p>To argue from evidence and demonstrate cause and effect (D)</p> Signup and view all the answers

What is the relationship between agricultural practices and greenhouse gas production?

<p>Agricultural practices can increase greenhouse gas emissions. (D)</p> Signup and view all the answers

What process is described when individuals move out of a population's home range?

<p>Emigration (B)</p> Signup and view all the answers

What can cause a population to increase in size?

<p>Births (C)</p> Signup and view all the answers

Which factor may influence the rate of immigration and emigration?

<p>The distance traveled by individuals (B)</p> Signup and view all the answers

How might human activity impact population movement?

<p>By facilitating or hindering migration (A)</p> Signup and view all the answers

What is the main reason for young animals to emigrate?

<p>To establish new territories (D)</p> Signup and view all the answers

Which statement about lionfish is correct?

<p>They were introduced to the Atlantic through human action. (C)</p> Signup and view all the answers

What happens to a fish population if there is a significant food shortage?

<p>The population may decrease in size. (A)</p> Signup and view all the answers

What occurs when individuals from a population arrive from elsewhere?

<p>Immigration (D)</p> Signup and view all the answers

What is the term used to describe the growth pattern observed when organisms reproduce rapidly?

<p>Exponential growth (B)</p> Signup and view all the answers

What happens to the size of a bacterial population during exponential growth in ideal conditions?

<p>It increases faster and faster. (C)</p> Signup and view all the answers

How many bacteria will there be at the end of one hour if one bacterium divides every 20 minutes?

<p>64 (C)</p> Signup and view all the answers

What is the maximum number of bacteria projected after one day of continuous growth with ideal conditions?

<p>4720 quintillion (B)</p> Signup and view all the answers

What happens to a population when the birthrate exceeds the death rate?

<p>The population increases. (D)</p> Signup and view all the answers

What shape represents the graph of a bacterial population under exponential growth conditions?

<p>J-shaped (C)</p> Signup and view all the answers

What factors contribute to the exponential growth of populations?

<p>Unlimited resources and absence of diseases (B)</p> Signup and view all the answers

How does the birth rate of lionfish in the Atlantic impact their population growth?

<p>It contributes to a high population growth due to low death rates. (D)</p> Signup and view all the answers

Which statement about sea otters is correct?

<p>They face high death rates due to hunting. (A)</p> Signup and view all the answers

In how many 20-minute periods will the bacteria divide to produce 512 cells?

<p>6 (C)</p> Signup and view all the answers

What factor is primarily responsible for the decrease in the sea otter population historically?

<p>High hunting rates. (A)</p> Signup and view all the answers

What is the initial condition of the hypothetical experiment with bacteria?

<p>One bacterium (C)</p> Signup and view all the answers

What is true about the reproductive behavior of lionfish?

<p>They can produce thousands of eggs at once. (A)</p> Signup and view all the answers

In population dynamics, what does it indicate if the birthrate equals the death rate?

<p>The population is stable. (B)</p> Signup and view all the answers

What is one of the factors that has made it difficult to control the lionfish population?

<p>The lack of effective hunting campaigns. (A)</p> Signup and view all the answers

What role does hunting play in managing the lionfish population?

<p>It aims to increase their death rate. (D)</p> Signup and view all the answers

What characterizes the initial phase of population growth according to the content provided?

<p>Growth is rapid and produces many offspring. (A)</p> Signup and view all the answers

What occurs during the second phase of logistic growth?

<p>The rate of population growth slows down. (B)</p> Signup and view all the answers

What is indicated by the S-shaped curve in logistic growth?

<p>Population growth eventually stops or levels off. (C)</p> Signup and view all the answers

At what point does population growth drop to zero in logistic growth?

<p>When resources become limited. (D)</p> Signup and view all the answers

Why do real-world populations not experience continuous exponential growth?

<p>Because various factors limit population growth. (D)</p> Signup and view all the answers

What happens when a population's growth levels off?

<p>The population can remain around that size indefinitely. (B)</p> Signup and view all the answers

Which of the following statements is correct about logistic growth?

<p>Logistic growth eventually leads to a halt in population increase. (B)</p> Signup and view all the answers

During which phase does the growth of a population begin to slow down?

<p>Phase 2: Growth Slows Down (A)</p> Signup and view all the answers

Flashcards

Ecology

The study of how organisms interact with each other and their environment.

Population

A group of individuals of the same species living in the same area.

Ecosystem

A community of interacting organisms and their physical environment.

Biosphere

The sum of all ecosystems on Earth.

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Sustainability

The ability of an economy to operate without degrading the environment.

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Resilience

The ability of an economy to adapt and continue functioning as the environment changes.

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Human-caused global change

Human activities that impact the environment, such as industrialization, emissions, and pollution.

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Nature's economy

The natural processes that provide essential resources for human economies, such as clean water and fertile soil.

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Measurable Changes in the Earth System

A model that describes changes in Earth's systems that can be measured using data, like changes in climate or sea level.

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Greenhouse Gases

A set of gases in the atmosphere, such as carbon dioxide, that trap energy from the sun, warming the Earth.

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Earth System Science

The study of how life interacts with the physical world, including Earth's systems, such as the atmosphere, hydrosphere, and geosphere.

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Birthrate

The number of births per unit of time in a population.

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Death rate

The number of deaths per unit of time in a population.

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Immigration/Emigration

The rate at which individuals enter or leave a population.

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Population growth

When the birth rate is higher than the death rate, the population increases.

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Stable population

When the birth rate is equal to the death rate, the population remains stable.

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Population decline

When the death rate is higher than the birth rate, the population decreases.

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Factors affecting population growth

A population can increase, decrease, or remain stable depending on the balance between birth and death rates.

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Human impact on population growth

Humans can affect the growth of a population by hunting or introducing new species.

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Immigration

The movement of individuals into a population.

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Emigration

The movement of individuals out of a population.

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Births

A population increase due to births.

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Deaths

A population decrease due to deaths.

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Net migration

The change in population size due to immigration and emigration.

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Limiting factor

A factor that limits the growth of a population, such as food, water, or space.

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Range expansion

The process of an organism spreading to new areas.

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Introduced species

The process of an organism being released into a new environment by humans.

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Logistic Growth

Population growth that starts slowly, then rapidly increases, and finally levels off as resources become limited.

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Carrying Capacity

The maximum population size that an environment can sustainably support, given its available resources.

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Phase 1: Exponential Growth

The phase of logistic growth where population size increases at an accelerating rate, due to unlimited resources.

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Phase 2: Growth Slows Down

The phase of logistic growth where population size increases at a slower rate, as resources become more limited.

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Phase 3: Growth Stops

The phase of logistic growth where population size levels off, as resources become fully utilized.

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Logistic Growth Curve

A graphical representation of logistic growth, resembling the letter 'S'.

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Exponential growth

A pattern of population growth where the number of individuals increases at an increasingly rapid rate, resembling the shape of the letter 'J' on a graph.

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Hypothetical bacterial experiment

A hypothetical scenario where a single bacterium divides every 20 minutes and its growth is not limited by resources or factors like predation.

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Population growth without limits

The number of individuals in a population increases at a constant rate over time, assuming unlimited resources and absence of limiting factors.

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Organisms that reproduce rapidly

A group of organisms that reproduce quickly, like bacteria, which can double their numbers in short periods due to rapid cell division.

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Organisms that reproduce slowly

A group of organisms that reproduce slowly, often with longer lifespans and slower generational cycles, unlike bacteria.

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Limiting factors for population growth

Factors that can limit population growth, such as limited resources, predation, and disease.

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Population growth stabilization

The point where the size of a population stops growing, reaching a stable equilibrium with the carrying capacity of its environment.

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