Exploring Populations and Communities

What is a "population" in the context of life science?

• A group of different species living in the same area

• A group of the same species living in the same area

• The physical environment where organisms live

• The interaction between living and non-living things

Which of the following best defines a "community" in an ecosystem?

• A single organism living in an area

• A group of the same species living in the same area

• All the different populations living together in an area

• The non-living components of an environment

Which of the following is an example of a population?

• All the birds, insects, and plants in a forest

• All the oak trees in a forest

• The soil, water, and sunlight in a forest

• The climate of a forest

Tags

NGSS.MS-LS2-4

Which of the following is an example of a community?

• A herd of elephants

• A school of fish

• A forest with trees, birds, and insects

• A single tree

What is a "limiting factor" in an ecosystem?

• A factor that increases the population size

• A factor that decreases the population size

• A factor that has no effect on the population size

• A factor that only affects abiotic components

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

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

• Water

• Temperature

• Sunlight

• Plants

Tags

NGSS.MS-LS2-2

Which of the following is an abiotic factor in an ecosystem?

• Animals

• Bacteria

• Rocks

• Fungi

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NGSS.MS-LS2-3

How does resource availability affect populations in an ecosystem?

• It has no effect on populations

• It only affects abiotic factors

• It can increase or decrease population sizes

• It only affects the largest populations

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which statement correctly distinguishes between a population and a community?

• A population includes multiple species, while a community includes only one species

• A population includes only one species, while a community includes multiple species

• A population includes abiotic factors, while a community does not

• A community includes abiotic factors, while a population does not

If a drought occurs in an ecosystem, which of the following is most likely to happen?

• Increase in water availability

• Decrease in plant populations

• Increase in animal populations

• No change in the ecosystem

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4