Ecosystems and Carbon Cycle

What is a limiting factor in an ecosystem?

• A resource that increases population size indefinitely

• A factor that causes population growth to decrease

• A factor that has no impact on population size

• A resource that is unlimited in an ecosystem

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following is an example of competition as a limiting factor?

• Two species of birds nesting in different types of trees

• A lion hunting a zebra

• Two species of fish eating the same type of algae

• A bear hibernating during winter

Tags

NGSS.MS-LS2-4

What is mutualism in symbiosis?

• A relationship where both species benefit

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

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

• A relationship where both species are harmed

In a food web, what are producers?

• Animals that eat other animals

• Organisms that produce their own food through photosynthesis

• Animals that eat plants

• Organisms that decompose dead matter

Tags

NGSS.MS-LS2-3

What defines a predator-prey relationship in food chains?

• A relationship where both organisms benefit

• A relationship where one organism eats the other

• A relationship where one organism helps the other find food

• A relationship where both organisms compete for food

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Which of the following best describes parasitism?

• A symbiotic relationship where both organisms benefit

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

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

• A symbiotic relationship where both organisms are harmed

What does carrying capacity refer to?

• The maximum number of individuals an ecosystem can support indefinitely

• The speed at which a population grows

• The total biomass an ecosystem can produce

• The number of species an ecosystem can support

Which of the following is a consumer in a food web?

• A grass plant

• A wolf eating a deer

• Sunlight

• Water

Tags

NGSS.MS-LS2-2

How does competition affect the carrying capacity of an ecosystem for a particular species?

• It increases the carrying capacity by reducing the population size

• It decreases the carrying capacity by increasing the population size

• It decreases the carrying capacity by limiting resources

• It has no effect on the carrying capacity

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What role do decomposers play in a food web?

• They produce their own food through photosynthesis

• They eat live plants and animals

• They break down dead organisms and recycle nutrients

• They compete with producers for sunlight

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3