Over the past 50 years, many researchers and farmers have been selectively breeding cattle to be more resistant to diseases. based on your knowledge of host-pathogen interactions, animals that are more resistant to disease have

These animals have genetic resistance to the diseases. This is attributed a process of selective breeding, which assists an animal in getting a better genetic disposition to ward of disease. They look at breed, genotype, and environmental interactions when deciding which cattle to breed.

Cells of an organism tell each other when predators are near.