7.10c

In a pond, which of the following changes would most likely result in terrestrial succession (turning the aquatic ecosystem into a land ecosystem)?

• An increase in water plants growing in the pond.

• A decrease in the number of decomposers in the pond.

• An increased rate of deposition of sediments into the pond.

• A decrease in the amount of dissolved oxygen in the water, which would result in the death of large fish in the pond.

Tags

NGSS.MS-LS2-4

The figure shows the same ecosystem in Texas at two different times. Which of the following most likely caused the change of species shown in the figure?

• The development of a parking lot

• A glacier retreating

• Humans preserving the natural habitats of native wildlife

• The occurrence of a forest fire

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

A hurricane hits a coastal ecosystem and destroys the habitat. Years later, there is an appearance of small plants with rapidly spreading roots on newly formed coastal sand dunes. The vegetation describes --

• a microhabitat.

• primary succession.

• secondary succession.

• biodiversity.

Tags

NGSS.MS-LS2-2

You observe a garden in a schoolyard. Corn, tomatoes, pumpkins, and other crops thrive in the garden. What is most likely true of the soil in this microhabitat?

• It is deep, dark, and nutrient rich.

• It is thin, acidic, and nutrient poor.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

How is secondary succession different from primary succession?

• Secondary succession occurs after a disturbance in an area that was previously uninhabited.

• Secondary succession occurs after a disturbance in an area in which the soil has remained intact.

An environmental scientist observed the stage of primary succession in an area and recorded his observations on note cards. Which of the following sequences show the correct order of events? 

• 1, 3, 4, 2

• 1, 4, 2, 3

• 2, 3, 1, 4

• 2, 1, 4, 3

Tags

NGSS.MS-LS2-3

Ecological succession can best be described as: 

• A change in weather.

• The dominant species in one particular area.

• A gradual change in plant and animal life in an ecosystem over time.

• Species that survive best when there is little or no competition in an area.

Tags

NGSS.MS-LS2-3

If the ecosystem is not altered (changed), which stage would be the most stable?

• grass

• pine forest

• shrub

• hardwood forest

Tags

NGSS.MS-LS2-1

A glacier in Alaska has melted back a distance of 100 kilometers over the last 200 years. Four stages in this process are shown in diagrams A, B, C, and D below.   In which order should the diagrams be placed to represent the ecological succession that has taken place in the area?

• C → D → A → B

• D → C → B → A

• C → D → B → A

• D → C → A → B

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which statement about pioneer species is TRUE?

• Pioneer species require soil to grow.

• Pioneer species are organisms that are made up of only one cell.

• Pioneer species thrive during the early stages of ecological succession.

• Pioneer species, such as hardwood trees, thrive during the final stages of ecological succession.