NGSS.HS-LS2-6

During the early settlement of the United States, pioneers cut down large tracts of forests on the east coast to use for home construction, for firewood, and to create cleared spaces to plant crops.What was the most likely effect of this kind of action?

• decreased plant and animal diversity
• decreased human populations
• decreased carbon dioxide production
• increased organism biodiversity.

Tags

NGSS.HS-LS2-6

The role of an organism in its environment.

• habitat
• niche
• community
• species

Tags

NGSS.HS-LS2-6

An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?

• Auklets
• Foxes
• Salmon
• Zooplankton

Tags

NGSS.HS-LS2-6

An increase in the amount of nutrients in a lake is known as

• nutrification

• algal blooms

• eutrophication

Tags

NGSS.HS-LS2-6

A landslide causes part of a mountainside to fall away, leaving bare rock. In the years immediately following the landslide, the area will experience

• primary succession

• secondary succession

• tertiary succession

• a climax community

Tags

NGSS.HS-LS2-6

In the years immediately after a fire, a forest will experience

• primary succession

• secondary succession

• tertiary succession

• a climax community

Tags

NGSS.HS-LS2-6

The clownfish lives among the tentacles of tropical sea anemones. The stinging tentacles of the anemone protect the clownfish from predators. The mucus on the fish protects it from the tentacles. In turn, the anemone is provided food from the predators that approach the anemone to eat the clownfish. What type of relationship does this example describe?

• parasitism

• mutualism

• competition

• commensalism

Tags

NGSS.HS-LS2-6

When a community is stable with little to no change, what level of ecological succession is taking place?

• Primary succession

• Secondary succession

• Tertiary succession

• Climax community

Tags

NGSS.HS-LS2-6

Which of the following logging methods would most likely result in regrowth such as that shown?

• clear-cutting

• a selection system

• the seed-tree approach

• the shelterwood approach

Tags

NGSS.HS-LS2-6

The process in which a new ecosystem is formed in an area that was lifeless.

• resource

• invasive (non-native) species

• primary succession

• competition

Tags

NGSS.HS-LS2-6