"bioaccumulate" - 1 õppematerjal

Inglise keel unit 5 answers

(c) (i) biological (pest control); 1 (ii) insecticides, are harmful to other organisms / may kill natural predators to the pest; reduces species diversity / disrupts food chains; many insecticides are, slow to biodegrade / long lasting; concentrate along food chains / bioaccumulate / bioconcentrate; stored in fat deposits of organisms; ref to effects on top carnivores; e.g. egg shell thinning poisonous to those applying them; A ref to humans / asthma sufferers pests can build up a resistance; ref to selection; run-off from land carries them into water supplies / causes pollution / poisons aquatic organisms;