2a&b. Plant and Animal Breeding & Field Trials
2c&d. Inbreeding & Cross Breeding
3a. Weeds, pests & plant disease
3b, c & d. Control of Weeds, Pests & Plant Disease
5a & b. Symbiosis, Parasites & Mutualism
6b & c. Altruism & Social Insects
8. Threats to biodiversity chris