Why reefs are where they are
Why reefs are where they are
Warm-water coral reefs are built by coral polyps that secrete calcium carbonate skeletons. Inside their tissues live zooxanthellae, microscopic algae that photosynthesise and share food with the coral.
Step-by-step lessons on OCR A GCSE Geography Distribution of coral reefs. Each one builds up to exam-style questions. Build a solid grasp of core physical and human processes before tackling the evaluation- and decision-making-style questions used in the final papers, which carry the most marks.