Ecosystems and Interconnectedness

What occurs when two different species living in the same territory start to fill the same ecological niche?

• Resource partitioning

• Symbiotic interactions

• Competitive exclusion principle

• Habitat loss

What is a keystone species?

• A species that has no predators

• A species that, if removed, results in the health of an ecosystem drastically declining

• A species that competes with others for the same resources

• A species that has a unique niche

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NGSS.HS-LS4-5

What is the role of ecosystem engineers in an environment?

• They modify their environment in such a way that other organisms rely on the changes to live or thrive.

• They are very sensitive to a certain environmental condition.

• They have a narrow range of tolerance.

• They are always invasive species.

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What can the presence, absence, or health of indicator species tell ecologists?

• The amount of rainfall in an area.

• The health and well-being of an ecosystem.

• The population size of predators.

• The level of soil nutrients.

What is the range of tolerance?

• The range of ecological conditions in which a species can survive.

• The range of temperatures a species can endure.

• The range of food sources a species can consume.

• The range of habitats a species can occupy.

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NGSS.MS-LS1-5

What can the introduction of invasive species lead to?

• Increased biodiversity and stability of food webs.

• Loss of biodiversity and collapse of food webs and ecosystems.

• No significant impact on native species.

• Improved health of indicator species.

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NGSS.MS-LS2-2

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Which of the following is not a type of symbiotic relationship

• Mutualism

• Parasitism

• Commensalism

• Metabolism

Answer explanation

Metabolism is the sum of all chemical reactions within the body

Mutualism is when....

• Both organisms involved in the relationship benefit

• One organism in the relationship benefits the other isn't harmed or benefitted

• One organism in the relationship benefits and the other is harmed

• Both organisms are harmed.

Answer explanation

Mutualism is when both organisms benefit

Tags

NGSS.MS-LS2-2

Parasitism is when....

• Both organisms involved in the relationship benefit

• One organism in the relationship benefits the other isn't harmed or benefitted

• One organism in the relationship benefits and the other is harmed

• Both organisms are harmed.

Answer explanation

Parasitism is a great method for population control in many organisms.

Commensalism is when....

• Both organisms involved in the relationship benefit

• One organism in the relationship benefits the other isn't harmed or benefitted

• One organism in the relationship benefits and the other is harmed

• Both organisms are harmed.

Answer explanation

Despite one organism not benefitting, commensalism is much more common than you'd think

Tags

NGSS.MS-LS2-2