instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
The cells in the follicle undergo physical changes and produce a structure called a corpus luteum.
answer:
The cells in the follicle undergo physical changes and produce a structure called a what?


question:
Tight junction is the term for a watertight seal between two adjacent animal cells.
answer:
What is the term for a watertight seal between two adjacent animal cells?


question:
Blood is made up of red blood cells, white blood cells, platelets, and plasma.
answer:

Blood is made up of red blood cells, white blood cells, platelets, and what else?