As a skilled microbiologist, you have been called to Farmer McDonald’s farm to investigate an outbreak of sores on the udders of his cows. Your first task is to determine whether the causative agent of the sores is a microbe. Explain how you will you use Koch’s postulates to accomplish this. The endosymbiotic theory proposes an explanation of the origin of mitochondria, chloroplasts, and eukaryotic cells. Discuss the evidence for this theory. Are you convinced? BIOS 252 Unit 2 Discussions ...