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

Input: Consider Input: What is defined as a repeating series of events that include growth, dna synthesis, and cell division?

Output: cell cycle

Input: Consider Input: What force pulls objects toward the center of the earth?

Output: gravity

Input: Consider Input: What type of seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production?
Output: heirloom seeds