Ecosystem and Population Dynamics

When a population is increasing.... (SELECT ALL THAT APPLY)

• Birth rate > Death rate

• Birth rate < Death rate

• Immigration > Emigration

• Immigration < Emigration

Tags

NGSS.MS-LS2-4

The first species to populate an area after a disturbance is called:

• A pioneer species

• A pilgrim species

• A founder species

• A primary species

All of the different species of living things in a given area is called:

• Population

• Community

• Ecosystem

• biome

What causes competition to occur in an environment?

• Good conditions make resources plentiful.

• Organisms struggle for a limited resource.

• Members of a population have different roles.

• A population falls below the environment’s carrying capacity.

Without other changes to a population, which of the following will cause a population to increase in size?

• The birth rate equals the death rate.

• The birth rate is less than the death rate.

• The birth rate is greater than the death rate.

• The birth rate and the death rate both equal 0.

Which of the following is an example of an abiotic limiting factor on population size?

• water availability

• Availability of food

• disease

• predation

Tags

NGSS.MS-LS2-1

When individuals join a population

• Aliens
• migration
• Immigration
• Emigration

Populations of organisms are dynamic.

• True
• False

Tags

NGSS.MS-LS2-4

One factor that drives population changes is

• the availability of resources.
• predation.
• both a and b.
• none of the above.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

If the populations of grasshoppers would decrease, what affect would that have on the population of lizards?

• Increase

• Stay the same

• Decrease

• Unable to determine

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4