Corals are animals that live attached to rocks and cannot move.
Corals can reproduce asexually by budding. This forms large colonies of genetically identical corals.
Once a year, on the same night, corals of the same species over a large area release egg cells and sperm cells into the sea.
Suggest why it is an advantage for corals of the same species to release their gametes on the same night.
Rising sea temperatures are killing the corals in many reefs.
Explain why reefs made mainly of colonies produced by asexual reproduction are more likely to be destroyed.
Scientists collect coral gametes and fertilise them in a laboratory.
Suggest why.
40 exam-style questions on Edexcel GCSE Biology 3.1 Reproduction and meiosis, covering 3.1.1 Advantages and disadvantages of reproduction and 3.1.2 Role of meiotic cell division. Each one has a worked solution and a mark scheme showing where the marks go.