7.10 ABC (Biomes, Biodiversity, Succession)

Ecological succession usually includes changes in all of the following EXCEPT -

• the number of different kinds of plants.

• the number of plants of any one species.

• the overall size of the dominant plants.

• the rate at which species produce offspring.

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In the process of ecological succession, grasses appear before shrubs because grasses -

• loosen the dirt for new trees to take root.

• provide food for animals returning to the area.

• require plenty of sunlight to make their own food.

• can grow rapidly even in areas with shallow soil.

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Which of the following contributes most to promoting sustainability in an ecosystem?

• Lack of decomposers

• A balanced water table

• Variety of organisms

• A narrow temperature range

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A forest is most sustainable when it has -

• tall trees only.

• small shrubs only.

• flowering plants only.

• a variety of plant species.

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The greatest sustainability is expected in the habitat with the -

• most biodiversity.

• highest latitude.

• largest water supply.

• greatest biomass.

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Changes to land that was once without soil

• Habitat

• Niche

• Primary succession

• Secondary succession

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The functional role of an organism in an ecosystem

• Habitat

• Niche

• Primary succession

• Secondary succession

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A wildfire has hit this grassland biome. How will this affect the rabbit population?

• The rabbits will have less competition and increase in number.

• The rabbit population will stay the same.

• The rabbit population will have no food and decrease.

• The rabbit population will become extinct immediately.

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Which biome has the most biodiversity?

• Desert

• Sand

• Tundra

• Rainforest

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What is the correct order of succession shown in this figure?

• A, B, C, D

• B, A, D, C

• C, D, A, B

• D, A, B, C

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