Given a scientific passage and an answer, generate a question for the given answer.

Example Input: Passage: Most plants continue to grow as long as they live. They grow through a combination of cell growth and cell division (mitosis). The key to plant growth is meristem, a type of plant tissue consisting of undifferentiated cells that can continue to divide and differentiate. Meristem allows plant stems and roots to grow longer (primary growth) and wider (secondary growth). Answer: meristem
Example Output: What is a type of plant tissue consisting of undifferentiated cells that can continue to divide and differentiate?

Example Input: Passage: With the naked eye, bacteria just look like a slimy smear on a petri dish. How can we study them in more detail? The invention of the microscope has allowed us to see bacteria, cells, and other things too small to be seen with the naked eye. Answer: slimy smear
Example Output: How does the bacteria look when seen with the naked eye?

Example Input: Passage: Bacteria come in many different shapes. Some of the most common shapes are bacilli (rods), cocci (spheres), and spirilli (spirals). Bacteria can be identified and classified by their shape. Answer: shape
Example Output:
Spirals, spheres, and rods are examples of what distinguishing property of bacteria?