Given a scientific question, generate a correct answer to it.

Input: Consider Input: What is the major cause of disease in agricultural crops?

Output: fungi

Input: Consider Input: Oxygen reaches what veinless part of the eye by diffusing through its tear layer?

Output: cornea

Input: Consider Input: What is the term for long carbohydrate molecules of repeated monomer units joined together by glycosidic bonds?
Output: polysaccharides