Ecology Review

Ecology Review

Symbiosis

• + +

• + -

• + o

Decomposers

• Break down dead stuff

• Return nutrients to the soil

• 
  

Multiple Choice

Acacia ants and Acacia trees have a relationship where they both benefit. What is this?

• population

• parasitism

• mutualism

• species

Multiple Choice

What do decomposers return to the soil?

• nutrients and organic matter

• water

• nitrogen

• carbon

Multiple Choice

What is lost at each trophic level

• mass

• energy in the form of heat

• matter

• nothing

Multiple Choice

Can an organism have more than one roll in a food web?

• Yes

• No

Levels of Organization

• Organism - one dog

• Population- group of dogs

• Community- a group of dogs, cats and horses living in an area.

• Ecosystem- all the communities plus their abiotic factors

• Biome- group of similar ecosystems

• Biosphere- the Earth

Multiple Choice

A student observes a group of fairy shrimp, clam shrimp and tadpole shrimp in a small pond. What level of organization is this?

• biosphere

• community

• ecosystem

• population

Succession

• Primary- begins in an area with no soil. Usually after a volcanic eruption

• Secondary- begins in an area with soil after a natural disaster or disturbance

Multiple Choice

Which process is faster,

primary or secondary succession?

• primary

• secondary

Multiple Choice

Which type of succession will have greater diversity of species?

• primary

• secondary

Carbon & Nitrogen Cycle

• Carbon sinks remove CO2

• Usable form of nitrogen is nitrates

• Terrestrial means land

• Aquatic means water

• Fertilizer = nitrates