T5 Populations, Communities, & Ecosystems

Many natural ecosystems change through secondary succession. Which of the following describes an ecosystem in which a secondary succession will most likely occur?

• a coastline newly formed from erupted lava

• an island where rain showers occur most afternoons

• a forest partly burned by wildfire caused by a lightning strike

• a hillside where all the soil and organisms were removed for mining

Tags

NGSS.MS-LS2-4

Cats eat mics, & mosquitos bite people. How are these two relationships similar?

• Only one organism in each relationship dies.

• Both organisms in each relationship are harmed.

• Only one organism in each relationship benefits.

• Neither organism in each relationship is harmed.

Lichens in a forest ecosystem are actually fungi and algae living together. The fungi benefit from food produced by the algae. The algae benefit from nutrients and water absorbed by the fungi.

the fungi & algae are an example of ______.

• mutualism

• commensalism

• parasitism

• predation

Birds building nests in trees is an example of ______.

• mutualism

• commensalism

• parasitism

• predation

Which of the following is NOT part of primary succession?

• pioneer species move in

• natural disruptions to ecosystem

• no soil or organisms initially

• lichens dissolve rock into soil

Which of the following is NOT part of primary succession?

• pioneer species move in

• soil present

• no soil or organisms initially

• lichens dissolve rock into soil

Which of the following is NOT part of secondary succession?

• natural disruptions to ecosystem

• soil present

• no soil or organisms initially

• occurs rapidly

Which of the following is NOT a reason that animals become endangered?

• too much biodiversity

• low genetic diversity

• loss of habitat

• environmental changes

Tags

NGSS.MS-LS4-4

What is the difference between mass extinction & background extinction?

• A mass extinction occurs slowly and eliminates one species. Background extinction occurs quickly and kills many species.

• A mass extinction occurs quickly and kills many species. Background extinction occurs slowly and eliminates one species.

• A mass extinction occurs from competition for available niches, and a background extinction occurs from a large, natural cause.

• A mass extinction occurs due to slow environmental changes, and a background extinction occurs due to a rapid, widespread environmental event.

Tags

NGSS.HS-LS4-5

Which of the following are NOT examples of ecosystem services in the image?

• water

• soil

• wind

• gases

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5