Which of the following is a disadvantage of growing crop plants using hydroponics?
Water-borne pathogens can spread rapidly through the shared nutrient solution.
It requires significantly more water than conventional soil-based agriculture.
Crop plants grown in hydroponic systems are unable to absorb mineral ions.
Crops cannot be grown in areas with poor or non-existent soil.
25 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.