Four pages covering the A Level theory Paper 3 examines and the extended data handling of Paper 4.
Cell structure, movement of substances, gas exchange and osmoregulation
Every marine organism is a cell or a collection of cells, and everything else in physiology follows from how substances cross the membrane that surrounds each one. This p...
8 questions · 27 marks
Revise this topicPhotosynthesis, chemosynthesis and respiration
Light in the sea changes with depth, and every marine food web except the vent communities starts with a pigment capturing that light. This page takes you from wavelength...
8 questions · 26 marks
Revise this topicLife cycles, sustainable fisheries and aquaculture
Marine organisms get through life in very different ways: a barnacle spends its adult life cemented to a rock and depends on a swimming larva to move, while a whale gives...
8 questions · 25 marks
Revise this topicEcological impacts, global warming, acidification and conservation
This page covers the four subtopics that carry the biggest marks in the human impact section: the ecological effects of what we put into the sea, the bioaccumulation and ...
8 questions · 28 marks
Revise this topic