Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Flowering vascular plants also have diverse leaves. However, the leaves of all flowering plants have two basic parts in common: the blade and petiole. The blade of the leaf is the relatively wide, flat part of the leaf that gathers sunlight and undergoes photosynthesis. The petiole is the part that attaches the leaf to a stem of the plant. This occurs at a node. Answer: blade and petiole
A:
What are the two basic parts that all flowering plants have in common?