Biology Keystone Exam

A food web

• shows how energy is released by an organism

• compares the amount of energy at each level

• shows how different food chains in a community are linked together

• is unique since each organism can only be part of one food web

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NGSS.MS-LS2-2

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An organism that uses what scavengers leave behind is a 

• herbivore

• carnivore

• decomposer

• omnivore

In an energy pyramid, 

• the organisms in each level eat those in the level below them

• the amount of energy increases as you move up each level

• producers are at the top

• the smallest organisms are at the top

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

The living part of an ecosystem

• Biotic

• Abiotic

• Mother Earth

• Flowers

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NGSS.MS-LS1-1

All the green plants that provide the energy for consumers.

• consumers

• producers

• decomposers

• herbivores

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NGSS.MS-LS1-6

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Organisms that return nutrients to the ecosystems are

• producers

• consumers

• decomposers

A species that plays a critical role in the health, maintenance, growth, or definition of an ecosystem.

• keystone

• invasive

• engineer

• predator

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NGSS.MS-LS2-4

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A species that is very sensitive to environmental changes and can help humans identify if the habitat is suffering.

• indicator

• umbrella

• predator

• mutualist

Tags

NGSS.MS-LS2-4

Mice might grow in population and destroy the community by eating all of the berry bushes if

• wolves and snakes were removed from the food web

• another predator migrated in to the community

• the snake population grew

• none of these

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

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What percentage of energy is passed on to the next trophic level?

• 5%

• 10%

• 50%

• 90%

Tags

NGSS.MS-LS2-3