Ecosystem and Environmental Factors Review

Which example could be evidence for an organism's growth being influenced by environmental factors?

• A plant species grows more slowly in drought conditions compared to wet conditions.

• A blue tulip crossed with a violet tulip will create a blue-violet tulip.

• An above-average-sized lion will produce offspring that are above-average-sized.

• A snake breed can be made smaller by breeding together only the smallest snakes.

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The available amount of which of the following can limit the population of organisms in an area? (Select all that apply.)

• Shelter

• Photosynthesis

• Space

• Water

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As populations grow, ecosystems produce more resources in order to support the larger population.

• True

• False

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A wildfire can be devastating to a forest ecosystem. Which of the following organisms is most likely to benefit from a large wildfire in a forest?

• A finch, which is a type of bird that builds its nest in a tree

• A meadow mouse, which eats nuts, seeds, and berries

• Trees, shrubs, and grasses

• Lichens, which live on rock and produce their own food

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Which of the following iare nonliving factors that influences the survival of an organism in an ecosystem?

• Amount of sunlight

• Other organisms

• Soil composition

• Amount of water

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If a disease causes a significant decrease in the population of one of the fish's food sources, how is the carrying capacity of the fish population likely to be affected?

• The carrying capacity of the fish will increase

• Biotic factors will no longer influence the fish population

• The carrying capacity of the fish will decrease

• The carrying capacity will be determined solely by abiotic factors such as water temperature

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What is the most likely outcome following the introduction of a new bird population on a small island with limited resources?

• The new bird species coexists with the existing populations without any significant impact

• Competition for resources increases, leading to a decline in some of the existing populations

• The existing predator bird populations nearly disappear, allowing the new bird species to dominate

• The island's resources are overutilized, leading to the decline of all populations

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How can the introduction of an invasive plant species impact an ecosystem?

• It would not affect native species

• It might compete with native plants and disrupt ecological relationships

• It would always lead to greater biodiversity

• It would only influence herbivores

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In a freshwater lake, overfishing has drastically reduced the population of a top predator fish. What are the potential long-term effects on the ecosystem?

• Only the overfished species will be affected

• The ecosystem will recover quickly once fishing stops

• Changes in prey populations and competitive dynamics may occur across multiple levels of the food web

• All other fish species will benefit equally from reduced competition

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How do limiting factors influence an ecosystem's carrying capacity?

• Limiting factors have no role in determining carrying capacity

• Limiting factors set the maximum population size an ecosystem can support

• Carrying capacity depends solely on non-living environmental factors

• Limiting factors always increase an ecosystem's carrying capacity

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