Examlex
The Markowitz mean-variance portfolio model presented in the text is a convex optimization problem.
Biotic
Term that indicates life; a cell is an example of a biotic factor in the environment.
Energy Flow
The movement of energy through a food chain or ecosystem, typically from the sun through producers to consumers and finally to decomposers.
Trophic Level
The position an organism occupies in a food chain, based on its feeding relationships, ranging from primary producers to apex predators.
Ecosystem
A community of interacting organisms and their physical environment.
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