Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: The vascular tissues for which these plants are named are specialized to transport fluid. They consist of long, narrow cells arranged end-to-end, forming tubes. There are two different types of vascular tissues, called xylem and phloem. Both are shown in Figure below . Answer: xylem and phloem
Output:
What are the two different types of vascular tissues called?