2024-2025 Unit 8 After Test

What is the correct order of levels of organization in an ecosystem from smallest to largest?

• Organism, Population, Community, Ecosystem

• Ecosystem, Community, Population, Organism

• Community, Ecosystem, Population, Organism

• Population, Organism, Ecosystem, Community

Which of the following is a biotic factor in an ecosystem?

• Sunlight

• Water

• Temperature

• Plants

Identify the abiotic factor from the following options:

• Bacteria

• Soil

• Fungi

• Animals

What is mutualism?

• A relationship where one organism benefits and the other is harmed

• A relationship where both organisms benefit

• A relationship where one organism benefits and the other is unaffected

• A relationship where neither organism benefits

Which of the following is an example of commensalism?

• A bird eating insects off a buffalo

• A remora fish attaching to a shark

• A tapeworm in a human intestine

• A wolf hunting a deer

Tags

NGSS.MS-LS2-2

What is parasitism?

• A relationship where both organisms benefit

• A relationship where one organism benefits and the other is harmed

• A relationship where one organism benefits and the other is unaffected

• A relationship where neither organism benefits

Which of the following scenarios best illustrates competition in an ecosystem?

• Two birds fighting over a nesting site

• A bee pollinating a flower

• A fish swimming in a pond

• A tree providing shade to a plant

In a predator-prey relationship, which of the following is true?

• The prey benefits from the relationship

• The predator is harmed by the relationship

• The predator benefits by obtaining food

• Both predator and prey benefit equally

Tags

NGSS.MS-LS2-3

Which of the following is an example of a food chain?

• Grass → Rabbit → Fox

• Sunlight → Water → Soil

• Tree → Bird → Nest

• Fish → Water → Algae

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

What role do decomposers play in an ecosystem?

• They produce energy from sunlight

• They break down dead organisms and recycle nutrients

• They compete with other organisms for resources

• They provide shelter for other organisms

Tags

NGSS.MS-LS2-3