Ecology Test Review

Match the following

• Community

• 
• Ecosystem

• 
• Population

• 

Which type of ecological succession is being depicted in the image?

• Primary Succession

• Secondary Succession

• Biodiversity Succession

• Evolution Succession

Answer explanation

Secondary succession occurs after some sort of disaster.

Soil is always present in secondary succession.

New species may move into the area that may not have been previously present.

Which organisms provide the most amount of energy when consumed?

• Fox ; Owl

• Rabbit ; Grasshopper

• Grain ; Grass

• Grasshopper ; Bird

Answer explanation

Producers will always have the most energy.

Producers receive their initial energy source directly from the sun.

Which organism would cause the most amount of instability if it were removed?

• Rabbit

• Fox

• Owl

• Bird

Answer explanation

Both the Hawk and Fox eat the rabbit.

If rabbits were removed, the population of hawk

and foxes would decrease because competition would increase for the mouse.

Which molecules would we see more of in our atmosphere if trees were removed?

• O₂

• CO₂

• Nitrogen

• Carbon

Answer explanation

If trees are removed from an area due to deforestation, there will be an increase in carbon based molecules in the atmosphere such as carbon dioxide (CO₂).

Carbon dioxide is a reactant in photosynthesis.

Enlarge the image if needed. ______ break down dead organic to replenish the ________ in the soil. _______ will then ¨fix¨ the nitrogen to the plants

• nitrogen

• bacteria

• decomposers

Answer explanation

Review the image carefully.

Which processes increase the amount of carbon in the atmosphere?

• burning fossil fuels

• photosynthesis

• decomposition

• respiration

Answer explanation

Examine the image carefully.

Which type of organisms recycle materials back into the soil?

• fungus

• bacteria

• producers

• all consumers

Answer explanation

Examine the image carefully

When a primary consumer eats a producer, how much energy is gained?

(__%)

Answer explanation

Approximately 10% of energy is gained in-between each trophic level.

Around 90% of the energy is lost, mostly due to heat.

Which of these organisms would be described as a Secondary Consumer?

• Hawk

• Grasses

• Mouse

• Owl

Answer explanation

Secondary consumers eat primary consumers.