Organisms within an ecosystem are organised into levels. Producer Producers are plants and algae, which photosynthesise. Primary consumer Primary consumers are herbivores, which eat producers.

Identify the producers and consumers in an ecosystem. Make a model of a food web. Explain how changes in the population of one organism can affect the entire food web. Ask students to list several ...

What happens during photosynthesis? - OCR 21st Century How do producers get the substances they need? - OCR 21st Century How are organisms in an ecosystem interdependent? - OCR 21st Century How ...