Environmental Science Ecosystems and Ecology 3

Question 1

What is the term for the total mass of living organisms in a given area or trophic level?

Accepted Answer

Biomass

Answer

Biodensity

Answer

Net primary productivity

Answer

Standing crop

Question 2

Which process removes dissolved oxygen from water, harming aquatic life, often caused by excess nutrient runoff?

Accepted Answer

Eutrophication

Answer

Salinization

Answer

Sedimentation

Answer

Acidification

Question 3

The competitive exclusion principle states that two species competing for identical resources cannot:

Accepted Answer

Coexist indefinitely

Answer

Evolve together

Answer

Share a predator

Answer

Occupy different niches

Question 4

Which term describes a species native and restricted to a particular geographic area?

Accepted Answer

Endemic

Answer

Invasive

Answer

Exotic

Answer

Migratory

Question 5

What is net primary productivity (NPP)?

Accepted Answer

Total photosynthesis minus plant respiration

Answer

Total energy in sunlight hitting an area

Answer

Energy consumed by herbivores

Answer

Total decomposer activity

Question 6

Which type of ecological relationship exists between a lion and a zebra?

Accepted Answer

Predation

Answer

Mutualism

Answer

Commensalism

Answer

Competition