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

[EX Q]: Passage: You consist of a great many cells, but like all other organisms, you started life as a single cell. How did you develop from a single cell into an organism with trillions of cells? The answer is cell division. After cells grow to their maximum size, they divide into two new cells. These new cells are small at first, but they grow quickly and eventually divide and produce more new cells. This process keeps repeating in a continuous cycle. Answer: cell division
[EX A]: What process allows an individual to develop from a single cell into an organism with trillions of cells?

[EX Q]: Passage: Although lots of symbiotic relationships help both organisms, sometimes one of the organisms is harmed. When that happens, the organism that benefits, and is not harmed, is called a parasite . This type of relationship is known as parasitism. Answer: parasite
[EX A]: Although lots of symbiotic relationships help both organisms, sometimes one of the organisms is harmed. when that happens, the organism that benefits, and is not harmed, is called a what?

[EX Q]: Passage: The nucleus is the largest organelle in a eukaryotic cell. It contains most of the cell's DNA. DNA, in turn, contains the genetic code. This code "tells" the cell which proteins to make and when to make them. You can see a diagram of a cell nucleus in Figure below . Besides DNA, the nucleus contains a structure called a nucleolus. Its function is to form ribosomes. The membrane enclosing the nucleus is called the nuclear envelope. The envelope has tiny holes, or pores, in it. The pores allow substances to move into and out of the nucleus. Answer: nucleus
[EX A]:
What is the largest organelle in a eukaryotic cell?