Examlex
How had the demographics of immigrants and the patterns of immigration shifted between the 1860s and the 1890s?
Trophic Level
The position an organism occupies in a food chain, based on its feeding habits.
Tertiary Consumers
Organisms that occupy the top level in a food chain by feeding on secondary consumers; they are typically predators.
Autotrophs
Organisms that can produce their own food from inorganic substances using light or chemical energy such as plants and certain bacteria and algae.
Carbon Fixation
The process by which inorganic carbon (usually in the form of CO2) is converted to organic compounds by living organisms, prominently through photosynthesis in plants.
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