instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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:
Plankton is the most common life form in the ocean.
answer:
What is the most common life form in the ocean?

question:
Bone marrow is found inside many bones and produces lymphocytes.
answer:
Bone marrow is found inside many bones and produces what?