Algae

Definition

Photosynthetic organisms that commonly live in water; algae began producing oxygen long before plants evolved.

Used by AQA

Specification 4.9.1.3 · Paper 2

The oxygen in the atmosphere now was produced by living organisms: first algae, then plants. They released oxygen as a product of photosynthesis.
Revise: Rise of Oxygen

1
Name algae first, then plants: do not credit the first rise in oxygen to plants alone.

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GCSE Chemistry · key term

Photosynthetic organisms that commonly live in water; algae began producing oxygen long before plants evolved.

Used by AQA

Specification 4.9.1.3 · Paper 2

The oxygen in the atmosphere now was produced by living organisms: first algae, then plants. They released oxygen as a product of photosynthesis.
Revise: Rise of Oxygen

1
Name algae first, then plants: do not credit the first rise in oxygen to plants alone.

Create a free account to read GCSE Chemistry revision notes for your exam board and track your progress.