Rob koch is the scientist who created tests that helped confirm those things
Organism X existed for a short period of time. I really like geology so trust me, I am 100% sure about this question.
(Mark me as the brainiest if this answer helps you!)
I'm thinking possibly d but I'm only a teen and I'm not sure
In the late 1950's - 1960's survival from cancer was poor. Damaging surgery and relatively unsophisticated radiotheraphy were the main treatments. Understanding of cancer treatment has transformed over 60 years. The arrival of chemotheraphy, and solid evidence for the link between cancer and factors such as smoking or viruses.
