12 Questions
What is the primary reason for the limited energy available for higher trophic levels in an ecosystem?
All of the above
Which process is primarily carried out by certain bacteria in soil or in symbiotic relationships with plants?
Nitrogen fixation
What is the term for the role or function of an organism within its ecosystem?
Niche
What is the principle that states two species competing for the same limited resources cannot coexist indefinitely?
Competitive exclusion
What is the term for the movement of phosphate ions through the lithosphere, hydrosphere, and biosphere?
Phosphorus cycling
What is the result of changes in one population or species in an ecosystem?
Cascading effects throughout the ecosystem
What is the primary function of trophic levels in an ecosystem?
To represent the transfer of energy and nutrients through an ecosystem
What percentage of energy is transferred to the next trophic level?
10%
What type of organism obtains organic molecules by consuming other organisms?
Heterotrophs
What do ecological pyramids represent?
The distribution of energy, biomass, or numbers of organisms across trophic levels
What is the primary difference between autotrophs and heterotrophs?
Their method of obtaining organic molecules
What is the term for organisms that produce their own organic molecules from inorganic sources?
Autotrophs
Understand the flow of energy and nutrients through ecosystems, from producers to tertiary consumers, and how energy is transferred between levels. Learn about the different trophic levels and their roles in the ecosystem.
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