In some countries, all the banana plants grown are clones of one variety. A new fungal disease of banana plants spreads to these countries. Why is this a serious threat to food security?
None of the plants are likely to have alleles that give resistance.
The fungus will cause mutations that make the bananas poisonous.
The plants cannot make antibodies quickly enough to kill the fungus.
The fungus will be passed on to people who eat the infected bananas.
127 exam-style questions on OCR GCSE Biology 6.2 Feeding the human race, covering 6.2.1 Biological factors affecting food security, 6.2.2 Agricultural solutions to growing demand, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, 6.2.5 Steps in genetic engineering, 6.2.6 Benefits and risks of gene technology in agriculture, and 6.2.7 Biotechnological solutions to growing demand. Each one has a worked solution and a mark scheme showing where the marks go.