Populations & Ecosystems Test Review

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

• plants

• bacteria

• fungus

• water

Which of the following best describes a population?

• members of the same species living in the same place at the same time

• all the red birds in an area

• all types of organisms living in the same place

• all the members of the same species

The number of wild horses per square kilometer in a prairie is the horse population’s

• density

• size

• dispersion

• birth rate

Which of the following is a density-dependent factor that can slow population growth?

• food

• temperature

• rainfall

• wildfire

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What determines the carrying capacity of an environment?

• growth rates

• limiting resources

• natural selection

• territorial size

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The place that contains everything an organism needs is its

• community

• species

• habitat

• population

A desert ecosystem contains

• air

• living things

• sand

• all of the above

Which of the following is part of an organism’s habitat?

• shelter

• food

• water

• all of the above

For a population’s growth rate to be zero

• more deaths than births must occur.

• more births than deaths must occur.

• no births can occur

• the average number of births and deaths must be the same

An example of a population would be all

• trees in a forest

• red maple trees in a forest

• plants in a forest

• animals in a forest