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Populations Study Guide

Quiz by Katie Shea

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15 questions
Show answers
  • Q1
    In the graph to the right, what is the population of deer at the carrying capacity of the environment?
    Question Image
    70
    40
    7
    3
    30s
  • Q2
    In a forest ecosystem, which of the following is NOT an example of a limiting factor that would greatly affect a rabbit population?
    Question Image
    a disease that causes rabbits to die
    the population of hawks that eat rabbits
    grass available to eat
    a rainy season
    30s
  • Q3
    When a population grows past the ecosystem's carrying capacity, what happens to the population?
    It continues to grow higher and highe
    The population starts to die off and returns to the carrying capacity.
    The population will go extinct due to lack of resources.
    30s
  • Q4
    The graph to the right shows the interaction of the wolf and moose populations on Isle Pekie. If the moose population continues to increase, the wolves' food supply will increase. What will most likely happen to the wolf population as a result?
    Question Image
    It will decrease.
    It will increase.
    It will remain the same.
    30s
  • Q5
    Something in the environment that keeps a population from steadily increasing is known as
    reproduction
    a limiting factor
    the carrying capacity
    population density
    30s
  • Q6
    The picture to the right represents a sunny, dry desert. Which factor most likely limits the desert’s carrying capacity for plant life?
    the amount of sunlight
    the availability of space to grow
    the number of animals that eat plants
    the availability of water
    30s
  • Q7
    The reason that organisms cannot produce populations of unlimited size is that
    Species rarely compete with each other for food.
    The resources of Earth are limited.
    There is no carrying capacity for the whole Earth.
    Populations always stay exactly the same.
    30s
  • Q8
    Which factor that limits a population’s size is important especially when population numbers become large and dense?
    seasonal changes
    sea level height
    competition for food
    extreme weather
    30s
  • Q9
    In a large Maine forest with many animals and lots of space, there are only a small number of bears. Which of these most likely limits the population of bears in the forest?
    supply of food
    cloud cover in the atmosphere
    types of trees in the area
    space
    30s
  • Q10
    A sample of bacteria was added to a culture dish containing a limited food supply. (Culture dishes are designed to help bacteria grow.) The dish was kept in an incubator for two weeks, was kept constant. The graph to the right shows where temperature that bacteria prefer to live in changes that occurred in the bacterial population over the two weeks. Which statement provides the best explanation for the population increase then decrease?
    Question Image
    The bacteria ate all of the available food.
    The bacteria were unable to reproduce until day 8.
    The bacteria could not grow at all in the provided temperatures.
    The bacteria could not grow at all with the provided food type.
    30s
  • Q11
    A population of salamanders that live in a river require clear, fresh water to survive. X New housing developments have caused tons of sediment to muddy the river. Which of these most likely will happen to the salamander population?
    The salamanders go live on land.
    The salamanders will move across land to another river.
    The salamanders will quickly adapt to living in the muddy water.
    The salamanders will decrease in number because of the water quality.
    30s
  • Q12
    A scientist was studying a population of fish in a pond over a period of 10 years. He observed that the population increased each year for 3 years, and then remained nearly constant for the rest of the study. The best explanation for this observation is that the population had
    stopped reproducing
    mutated into a different species
    reached carrying capacity
    run out of food and all died
    30s
  • Q13
    Ten breeding pairs of mink are introduced onto an island with no natural predators and a good supply of water and food. What will most likely happen to the mink population?
    It will die out.
    It will increase until it exceeds carrying capacity.
    It will decrease and then increase forever.
    It will remain relatively constant due to equal birth and death rates.
    30s
  • Q14
    One species of Galapagos finches, the cactus finch, eats insects off cactus plants. A disease kills off most of the cacti in the Galapagos Islands. Which of these most likely would happen to the carrying capacity of the island?
    It would decrease a lot because there is less to eat.
    It would increase a small amount since the insect population would decrease.
    It would remain about the same since the finches would change to a different die
    30s
  • Q15
    Mice produce a large number of offspring all year long, yet the number of mice within a given population changes very little from year to year. The stability of the population size is most likely the result of
    limiting factors that keep the population in check
    the development of mutations in young mice
    mice continuing to reproduce when its population is large
    the survival of more female mice than male mice
    30s

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