Homeostasis Storyline Review

In a community of Orcas, Otters, Urchins, and Kelp which would be the secondary consumer ?

• Orcas

• Otters

• Urchins

• Kelp

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NGSS.MS-LS2-3

What happens if sea otters are removed from the ocean ecosystem?

• The ecosystem becomes more balanced

• Kelp forest ecosystems may suffer due to unchecked sea urchin populations

• There is no significant impact on marine ecosystems

• Increased fish populations due to fewer predators

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NGSS.MS-LS2-4

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How did human activity in the Pacific Northwest affect otter populations?

• Over-whaling resulting in a change in Orca diets.

• By introducing pollutants into their environment

• Catching otters to use their fur

• All of the above

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NGSS.MS-LS2-4

NGSS.MS-LS2-1

What do ocean populations need to look like to maintain a healthy balance in their ecosystem?

• A balanced ratio of predators to prey

• An equal number of each species

• A larger number of prey compared to predators

• Random distribution without any specific ratio

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NGSS.MS-LS2-4

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What are the abiotic factors that impact an ocean community/system?

• Temperature and sunlight

• Types of fish and algae

• Pollution levels

• Fishing regulations

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How do abiotic and biotic factors affect populations?

• By increasing the population size

• By decreasing the population size

• By not affecting the population size

• By causing fluctuations in the population size

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NGSS.MS-LS2-4

How have humans impacted the ocean water?

• By increasing pollution

• By decreasing water temperature

• By increasing biodiversity

• No impact

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NGSS.MS-ESS3-4

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How do humans impact ocean acidification?

• By increasing carbon dioxide emissions

• By planting more trees

• By reducing plastic use

• By using renewable energy sources

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What is homeostasis?

• The process by which a living organism maintains stable internal conditions despite changes in the external environment.

• The process by which a living organism reproduces.

• The process by which a living organism digests food.

• The process by which a living organism grows.

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NGSS.HS-LS1-3

How do organisms respond to biotic/abiotic factors and internally regulate themselves?

• Through behavioral changes

• By altering their genetic makeup

• Maintaining homeostasis

• None of the above

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