Changes in biodiversity
7 months ago
alsmith260
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20 QuestionsShow answers
  • Question 1
    30 seconds
    Q. Scientists think people have directly caused the extinction of some species through ______________.
    answer choices
    habitat destruction
    poaching
    pollution
    All of these
  • Question 2
    30 seconds
    Q. The major cause of extinction is ____________________.
    answer choices
    habitat fragmentation
    habitat destruction
    pollution
    poaching
  • Question 3
    30 seconds
    Q.

    Which of the following is likely to be affected by a growing human population?

    answer choices

    amount of land for agriculture (farming)

    amount of clean water

    amount of air pollution

    all of the above

  • Question 4
    30 seconds
    Q. Which statement best summarizes the effect of human population growth on other species?
    answer choices
    The effect is always positive; other species thrive when humans do.
    The effect is mostly positive; most other species thrive when humans do.
    The effect is always negative; wherever there are humans, other species suffer.
    The effect is mostly negative; fewer resources are available for most other species when human populations grow.
  • Question 5
    45 seconds
    Q.

    Humans' need for more space leads to

    answer choices

    creation of nonrenewable resources

    population growth

    lack of fresh water

    destruction of habitats

  • Question 6
    30 seconds
    Q.

    In some communities, forests are cleared through burning, and the deforested land is used for farming. Which of these is a negative consequence of this practice?

    answer choices

    Less sunlight reaching the ground

    Increased availability of soil nutrients

    Decreased plant and animal diversity

    Greater access to water for plants and animals

  • Question 7
    45 seconds
    Q.

    Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the MOST likely outcome for the ecosystem?

    answer choices

    Biodiversity would increase, and sustainability would decrease

    Biodiversity would increase, and sustainability would increase

    Biodiversity would decrease, and sustainability would increase

    Biodiversity would decrease, and sustainability would decrease

  • Question 8
    30 seconds
    Q.

    Which of these is a threat to the survival of an ecosystem?

    answer choices

    Competition among some consumer populations

    Less biomass at higher levels of the food web

    A shrinking variety of animal and plant species

    Predator-prey population cycles

  • Question 9
    30 seconds
    Q.

    Why is a reduction in biodiversity due to loss of plant populations especially destructive to an ecosystem?

    answer choices

    Plants are primary producers

    Plans have the most biomass

    Plants are resistant to disease

    Plants are part of the food web

  • Question 10
    45 seconds
    Q.

    Which of these explains why an

    ecosystem is healthy when it has a variety of species?

    answer choices

    An increased number of species allows for fewer food chains

    A larger number of species reduces competition for abiotic resources

    An increased number of species contributes to greater chances for adaptability

    A larger number of species allows for greater diversity in interdependence

  • Question 11
    30 seconds
    Q.

    Which of these living things in a grassland ecosystem depend on the presence of a variety of bacteria and other microorganisms in the soil?

    answer choices

    Worms Only

    Green plants only

    Plants and animals only

    All the organisms in the ecosystem

  • Question 12
    30 seconds
    Q.

    Which change in the environment would have a negative effect on the survival of a species in an ecosystem?

    answer choices

    Increase in the population of prey

    Introduction of a competing species

    Decrease in the population of predators

    Increase in genetic diversity of the species

  • Question 13
    45 seconds
    Q.

    New Zealand is home to many flightless birds, such as the kiwi, which build their nests on the ground. Over time, ground predators such as possums have been introduced. Which statement could be a possible effect on the kiwi?

    answer choices

    Possums could eat the eggs and reduce the number of kiwi chicks

    Kiwi could develop the ability to fly short distances to escape possums

    Possums could make the nests their home so the kiwi have to build new nests

    Kiwi could lay three times as many eggs to ensure the survival of their chicks

  • Question 14
    30 seconds
    Q. Which of the following describes the number of species and abundance of each species that live in a particular location?
    answer choices
    genetic diversity
    species diversity
    ecological diversity
  • Question 15
    30 seconds
    Q. Where will you find the most biodiversity?
    answer choices
    in the south pole
    in the north pole
    near the equator
    in the oceans
  • Question 16
    30 seconds
    Q.

    Soil erosion can increase when humans remove trees and other vegetation from an area. What is this process called?

    answer choices

    decomposition

    conservation

    deforestation

    urbanization

  • Question 17
    30 seconds
    Q.

    Changes to an ecosystem's biodiversity can have a direct effect on humans because humans-

    answer choices

    inhabit all areas of the Earth's ecosystems

    use minerals from the ground to make things

    depend on the Earth's natural resources

  • Question 18
    60 seconds
    Q.

    A reduction in the variety of pollinating insects would negatively affect the plant populations that depend on them. Which of the following describes the most serious impact this would have on humans?

    answer choices

    Plants that don't need insects to pollinate would take over most habitats

    there would be a decrease in the availability of honey

    crops that humans use for food would be diminished

  • Question 19
    30 seconds
    Q.

    deforestation is

    answer choices

    the action of clearing a wide area of trees

    the number of different species of plants and animals in an area

    site for disposal of garbage

  • Question 20
    30 seconds
    Q.

    Introducing non-native species can

    answer choices

    cause a decrease in biodiversity

    can harm native species

    Can decrease biodiversity and harm native species

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