Which of the following best reflects the level of medical decision-making complexity?

When the fraction 4/5 is written as a ratio, it is

A) 4:5 B) 4::5 C) 5:4 D) 5::4

Which of the following is a distinct group of organisms that can be seen on the surface of the culture medium?

A. Colony B. Yeast C. Agar D. Keratin E. Mordant