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level: Food Production

Questions and Answers List

level questions: Food Production

QuestionAnswer
What is Exponential growthNothing limiting a populations size
What are fertilisers used forAdds extra nitrates to the soil to increase and speed up plant growth
What are pesticides used forTo kill pests that destory/ eat crops
Describe the use of nitrates in a plantTo make amino acids (Nitrates → amino acids → proteins)
Describe the stages of Algal Bloom1- Fertilizer leach into water adding unwanted nitrates 2- Increase Algal populations which reduces sunlight from getting to aquatic plants 3- The plants die then becoming food for bacteria 4- The bacteria take up lots of oxygen reducing oxygen availability for living organisms like fish so they die
What don't dissolve into water easily so less algal blooms are formedManure and Compost
Why do you have to be careful when using pesticidesThey can accumulate in the crop and can be eaten by consumers
What is Biological controlThe use of living organisms instead of chemicals to kill pests
How can Genetically modified crops helpCrops can be genetically modified to become resistant to pests
What is BioaccumulationPesticides sprayed onto crops can gatherin the bodies of organisms over time, as they are passed along the food chain, toxicity increases and can reach lethal levels