Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
Producers
1. Organisms that produce their own food from simple inorganic substances such as water, sunlight, and carbon dioxide are called producers.
2. Examples are green plants and blue-green algae.
Consumers
1. Organisms that consume the food prepared by producers are called consumers.
2. Examples are cows and human beings.