Scientific Development

41. Who discovered the first successful treatment for anthrax?
A) Robert Koch
B) Edward Jenner
C) Louis Pasteur
D) Selman Waksman

42. What is the name of the process by which rocks are broken down into smaller pieces by physical means?
A) Erosion
B) Weathering
C) Deposition
D) Subduction

43. Who discovered the principle of natural selection?
A) Charles Darwin
B) Gregor Mendel
C) Alfred Russel Wallace
D) Thomas Malthus

44. What is the name of the process by which sediment is deposited in a new location?
A) Erosion
B) Weathering
C) Deposition
D) Subduction

45. Who discovered the first successful treatment for yellow fever?
A) Walter Reed
B) Ronald Ross
C) Robert Koch
D) Paul Ehrlich