Ecosystem Structure
Which level of ecosystem structure contains all the other levels?
Biosphere
Two lions from rival prides are hunting the same herd of gazelle. This is an example of...
Competition
What is the source of energy in photosynthesis?
Sunlight
What trophic level is responsible for breaking down dead and decaying organisms?
Decomposer
What is special about the phosphorus cycle?
No atmospheric component/Rock and Sediment Storage/Extremely slow
What's the smallest level of ecosystem structure that contains more than one species?
Community
The role and position a species has in its environment is known as its...
Niche
Where does most of the energy released in cellular respiration go?
Lost as heat
When drawing out the food web below, which way should the arrow point?
Eagle Snake Mouse Grain
To the left (towards the consumer)
Name one SINK of carbon.
Atmosphere, ocean, fossil fuels, etc.
What is the largest level of ecosystem structure that contains only 1 species?
Population
An invasive species shares the same niche as a native species, and they are evenly matched in obtaining food. However, the invasive species reproduces more quickly. What is likely to happen to the native species?
It will go extinct
What energy-storing molecule is a product of cellular respiration?
ATP
What percentage of energy from a PRIMARY PRODUCER is available to a PRIMARY CONSUMER?
10%
What specific organisms are responsible for converting atmospheric nitrogen (N2) into ammonia?
Nitrogen-fixing bacteria
A road runs through a forest, splitting it in two. This is an example of ________, which causes _________.
Habitat fragmentation, edge effects
If two species exist in the same niche, one will eventually out-compete the other. What is this phenomenon called?
Competitive Exclusion Principle
What is the Chemical formula for Cellular Respiration?
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
What percentage of energy from a PRIMARY PRODUCER is available to a SECONDARY CONSUMER?
1%
Name a SOURCE of carbon.
Burning of fossil fuels, forest fires, etc.
A lava flow hardens into new land. Over time, the land is populated by lichens, then soil forms, then plants take hold, and eventually a new ecosystem exists. What is this phenomenon called?
Primary succession
When species divide a niche to avoid competition for resources, it is called...
Resource partitioning
What are the REACTANTS of cellular respiration?
Glucose and oxygen
If the primary producer has a biomass of 5,000 kg in an ecosystem, what biomass can we expect from a SECONDARY CONSUMER?
50 kg
As the ocean absorbs carbon dioxide, its pH ________. This causes the ocean to become more __________.
Decreases, acidic