C

An ecosystem that is not sustainable can break down when a natural disaster occurs. This can lead to organisms in the ecosystem either leaving the area or dying off. Increased biodiversity results in a more sustainable ecosystem because ---

• A. a greater number of plant species means that there is less barren land.

• B. a greater variety of species present allows more organism to adapt after changes occur

• C. the transition area between two ecosystems is narrower.

• D. there are few species to be affected by environmental stressess.

Tags

NGSS.MS-LS2-5

NGSS.MS-LS2-2

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.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

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

Tags

NGSS.MS-ESS2-2

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.

Tags

NGSS.MS-LS2-4

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.

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

Tags

NGSS.MS-LS2-5

NGSS.MS-LS2-3

The greatest sustainability is expected in the habitat with the -

• most biodiversity.

• highest latitude.

• largest water supply.

• greatest biomass.

Tags

NGSS.MS-LS2-5

The functional role of an organism in an ecosystem

• Habitat

• Niche

• Primary succession

• Secondary succession

Which biome has the most biodiversity?

• Desert

• Sand

• Tundra

• Rainforest

Tags

NGSS.MS-LS2-5

After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?

• Lichens → Shrubs → Grasses → Trees

• Lichens → tree → shrubs→Grasses

• Grasses → Lichens → Shrubs → Trees

• Lichens → Grasses → Shrubs → Trees

Tags

NGSS.MS-LS2-3