O-LevelBiologyCell Biology5090/11 · May/June 2025 · Q71 Mark
Frogs are amphibians and so have a partially permeable skin. They live in and near water such as lakes and marshes, where the water contains a low concentration of mineral ions. They absorb any water they need through their skin. Biologists are concerned that frogs living near coasts will be endangered if global warming leads to a rise in sea level. Sea water contains a high concentration of mineral ions. What would happen to the frogs if their habitat became flooded with sea water?
AWater would move into the frog by osmosis.
BMineral ions would move out of the frog by diffusion.
CWater would move into the frog by diffusion.
DWater would move out of the frog by osmosis.
✓ Correct answer
D: Water would move out of the frog by osmosis.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Cell Biology and see which topics are most likely to come up next.
Sign up free →