Population Growth and Carrying Capacity
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Questions and Answers

What contributed to the decrease in death rate, leading to exponential growth of the human population?

  • Improvement in medical technology
  • Rise in global temperatures
  • Increase in food availability
  • Improved sanitation and living conditions (correct)
  • What is the primary reason for the slowing down of population growth in countries like the United States, Japan, and much of Europe?

  • Environmental factors such as pollution
  • Low immigration rates
  • High emigration rates
  • Low birth rates and high death rates (correct)
  • What is a necessary condition for exponential growth of the human population?

  • Birth rate exceeds death rate (correct)
  • Birth rate equals death rate
  • Emigration rate exceeds immigration rate
  • Death rate exceeds birth rate
  • What is the main concern regarding the exponential growth of the human population?

    <p>The resources on Earth are limited and may not be able to support the growing population</p> Signup and view all the answers

    What is the study of human populations referred to as?

    <p>Demography</p> Signup and view all the answers

    What happens to the growth rate as the population reaches the carrying capacity?

    <p>It slows down</p> Signup and view all the answers

    What is an assumption made by both the exponential and logistic models?

    <p>The carrying capacity is constant and does not fluctuate</p> Signup and view all the answers

    What is an example of a limiting factor?

    <p>Drought and other climate extremes</p> Signup and view all the answers

    What is a density-dependent limiting factor?

    <p>A factor that only limits population growth when the population density reaches a certain level</p> Signup and view all the answers

    Why are the exponential and logistic models not accurate representations of real populations?

    <p>Because they do not account for environmental changes</p> Signup and view all the answers

    What is the condition necessary for a population to grow exponentially?

    <p>Ideal conditions with unlimited resources</p> Signup and view all the answers

    What happens to the population growth rate as resources become scarce?

    <p>It slows or stops</p> Signup and view all the answers

    What shape is the graph of exponential growth?

    <p>J-shaped curve</p> Signup and view all the answers

    What is a limiting factor in population growth?

    <p>A factor that restrains the growth of a population</p> Signup and view all the answers

    What happens to the competition between members of a population as it grows exponentially?

    <p>It increases</p> Signup and view all the answers

    What happens when the population size is small?

    <p>Birth rates are high and death rates are low, causing the population to grow nearly exponentially.</p> Signup and view all the answers

    What is the carrying capacity of the environment?

    <p>The number of individuals the environment can support over a long period of time.</p> Signup and view all the answers

    What happens when the population exceeds the carrying capacity of the environment?

    <p>Many members of the population die or starve, causing the population size to drop below the carrying capacity.</p> Signup and view all the answers

    What is the shape of a logistic growth graph?

    <p>A stretched out letter 'S'</p> Signup and view all the answers

    What happens when the population is at the carrying capacity?

    <p>Birth rates equal death rates, and growth stops.</p> Signup and view all the answers

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