Population Ecology (Review)

The most basic level of ecological organization is a(n) __________.

• biosphere

• individual

• ecosystem

• population

The study of living and nonliving components of a system can best be described as a(n) __________.

• abiotic factor

• biotic hierarchy

• ecosystem ecology

• organism interaction

Tags

NGSS.MS-LS2-3

Habitats provide organisms with the ________ they need to live, such as food, shelter, breeding sites, and mates.

Tags

NGSS.MS-LS2-1

What is the main difference between an ecosystem and a habitat?

• An ecosystem is a community of living organisms and their physical environment, while a habitat is the natural environment in which a specific organism lives.

• An ecosystem refers to only the living components in an area, whereas a habitat includes both living and non-living components.

• There is no difference; both terms can be used interchangeably.

• A habitat is a larger area that can contain multiple ecosystems.

When a population size ________________ or remains steady, this is often a sign of a healthy population.

Tags

NGSS.MS-LS2-4

If a population size begins to ________________ rapidly, this can be a signal that extinction is coming.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS4-4

Instead of counting each organism individually, ecologists use ________________ methods to estimate population sizes.

A population’s density describes how ________________.

• old the population is.

• crowded the population is.

• big the population is.

• fast the population is declining.

Which piece of information is used along with population size to calculate population density?

• area

• weight

• age

• location

Which type of population distribution is found most often in nature?

• Uniform

• Random

• Clumped

• Linear