First Order Consumers, definition of
  
- First Order Consumers
 
1st Order Consumers are animals that eat plants. They are the first step in the food chain.    
For instance:
First-order Consumer - the organism that eats the producer. 
Second-order Consumer - the organism that eats or derives nutrients from the first-order consumer. 
Grass (Producer) is eaten by the zebra (1st order Consumer) who is eaten by the lion (2nd order Consumer).
Related Tags: food chain
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