mutation – n. a change in the genes of a plant or animal that causes a difference from what is usual in that living creature

fur – n. the hairy coat of an mammal

cull –v. -to control the size of a group of animals by killing some of them

transmit – v. to pass from one to another

species – n.(pl) a group of animals or plants that are similar and can produce young
compensate – v. to give money or something of value in return for some action, loss or damage

trace – v. to try to find someone or who they have met by collecting and studying evidence

scenario – n. a description of what could possibly happen