Ecology TEST

Which statement best describes a population at, or near, its carrying capacity?

• birth and death rates are about the same

• birthrate is declining

• overall population is increasing exponentially

• overall population is increasing logistically

Tags

NGSS.MS-LS2-1

An symbiotic relationship in which both organisms benefit is called

• competition

• mutualism

• parasitism

• predation

The role an organism plays in its environment is called its

• habitat

• niche

Tags

NGSS.MS-LS2-2

Natural disturbances, such as fires or hurricanes can result in (select the most accurate)

• commensalism

• parasitism

• competition

• successsion

Tags

NGSS.MS-LS2-4

Removal of which type of organism has the most dramatic impact on an ecosystem?

• primary consumer

• secondary consumer

• producer

• tertiary consumer

Tags

NGSS.MS-LS2-4

Which is most likely to be a pioneer species during primary ecological succession?

• deer

• bird

• tree

• lichen

An example of a density dependent factor for a population is

• drought

• landslide

• period of freezing weather

• number of cougars in a forest

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

When a population has brief growth before leveling off, what does the leveling off indicate?

• It has reached the carrying capacity of ecosystem

• It has exceeded the carrying capacity of ecosystem

• It is undergoing a period of exponential growth

• It is no longer able to adapt

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

If the number of deaths & emmigrations of a population is greater than the number of births & immigations

• population size increases but then decreases

• the population size remains the same

• population size increases

• population size decreases

Tags

NGSS.MS-LS2-4

Which of the following is the smallest ecological unit?

• an ecosystem

• a community

• a biome

• a population