A2 Biology AQA 5.5 Exam 2023-Biological & chemical pesticides

Pest - correct answer An organism that competes with humans for food or space or is a danger to health. Pesticides - correct answer Are poisonous chemicals that kills pests. Features of an effective pesticide - correct answer -Specific -Biodegradable -Cost-effective -Not accumulate Specific - correct answer The pesticide is only toxic to on organism, which it is directed towards. Harmless to humans and any other organisms. Biodegradable - correct answer The pesticide once applied will breakdown,into harmless substances. Cost effective - correct answer New pesticides are only useful for a period of time as pests become resistant, so pesticide can become useless. Not accumulate - correct answer pesticides need to make sure that it does not build up in specific parts. Types of pest control - correct answer Biological Artificial Integrated Biological control - correct answer By using organisms that are either predators of parasites of the pest organisms. This destroys the pest, preventing it from affecting growth. Why use biological control - correct answer -To control the pest not eradicate it -If it eradicated, then the parasites would die as nothing to feed on. -Pest should be able to live where it has little or no affect. Advantages of biological control - correct answer -Very specific -Pests do not become resistant -Once introduced, then control organism reproduces itself