Cycles/Succession Station

What is formed during primary succession that doesn't need to be formed during secondary succession?

• pioneer species
• soil
• climax community
• lichens

After a forest fire, an ecosystem would start regrowth through -

• primary succession
• secondary succession
• climax community
• limiting factors

succession that occurs in an area with no soil

• ecological succession 
• primary succession 
• secondary succession
• pioneer speciles

How do lichens contribute to primary succession?

• Lichens decompose organic matter from animals and plants
• Lichens begin to break down rock to form soil
• Lichens are nitrogen fixing bacteria
• Lichens convert carbohydrates into fossil fuels.

The picture shows what type of succession?

• primary

• secondary

• tertiary

• quadanary

After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?

• Lichens → Shrubs → Grasses → Trees

• Lichens → tree → shrubs→Grasses

• Grasses → Lichens → Shrubs → Trees

• Lichens → Grasses → Shrubs → Trees

Which nitrogen cycle process is occurring when bacteria convert ammonium to nitrite and then into nitrate?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

features of environment that are alive or were once alive

• biotic

• abiotic

• inbiotic

• biography

Animals and humans get the most of the nitrogen they need

• by consuming plants

• by breathing in atmospheric nitrogen.

• directly from bacteria in the soil.

• from the process of denitrification.

Which of the following is correct?

• There is as much carbon on earth as when it was formed

• Carbon is being created whenever it is recycled

• Carbon is lost every time it is recycled

• Carbon changes to different forms and is never recovered