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

Input: Consider Input: Passage: Cloning is the process of creating an exact genetic replica of an organism. The clone's DNA is exactly the same as the parent's DNA. Bacteria and other single-celled organisms have long been able to clone themselves through asexual reproduction. Plants can also reproduce asexually. In animals, however, cloning does not happen naturally. In 1997, that all changed when a sheep named Dolly was the first large mammal ever to be successfully cloned. Other animals can now also be cloned in a laboratory. Answer: cloning

Output: What is the process of creating an exact genetic replica of an organism called?

Input: Consider Input: Passage: The combined gas law relates pressure, volume, and temperature of a gas. Answer: combines gas law

Output: Which law relates the pressure, volume, and temperature of a gas?

Input: Consider Input: Passage: Smooth muscles and cardiac muscles are not attached to bone. Recall that these types of muscles are under involuntary control. Smooth muscle is responsible for the contractility of hollow organs, such as blood vessels, the gastrointestinal tract, the bladder, or the uterus. Like skeletal muscles, smooth muscle fibers do contract together, causing the muscle to shorten. Smooth muscles have numerous functions, including the following. Answer: smooth muscle
Output: What kind of muscle is responsible for hollow organs contracting?