
UNIT 7 Organisms & Their Environment
Authored by Welf Jentsch
Science
7th Grade
Used 24+ times

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60 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A group of ecosystems that share similar climates and typical organisms
biome
ecosystem
interrelated
interdependent
interaction
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The more diverse an ecosystem is --
the more threatened its populations are
the more similar the species will be
the more sustainable it is
the fewer varieties of species are present
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following situations contributes to the sustainability of an ecosystem?
Increase in biodiversity
Decrease in biodiversity
Extinction of a population from the ecosystem
Removal of many populations of organisms
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following sequences most likely represents ecological succession on a recently abandoned wheat field?
grasses → flowering plants → shrubs → native trees
native trees → shrubs → flowering plants → grasses
shrubs → grasses → native trees → flowering plants
flowering plants → native trees → shrubs → grasses
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A hurricane hits a coastal prairie and destroys the habitat. Years later, there is an appearance of small plants with rapidly spreading roots.
This vegetation describes —
a microhabitat
primary succession
secondary succession
biodiversity
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When forest fires destroyed many of the pine trees in Bastrop State Park, the burned areas began secondary succession. What is the role of succession in this example?
Creating new soil by chemical and physical weathering of rocks
Restoring the ecosystem through grass, shrub, and tree stages
Changing the landscape to be more fire resistant in the future
Opening the land for new uses like farming and raising livestock
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does secondary succession help restore equilibrium to a region destroyed by a flood?
It increases the number and types of species
It brings back species from extinction
It stops the other flood from occurring
It decreases the rate of evolution
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