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

[EX Q]: Passage: Animals and most plants have two special chromosomes. They are called sex chromosomes . These are chromosomes that determine the sex of the organism. All of the other chromosomes are called autosomes . Genes on sex chromosomes may be inherited differently than genes on autosomes. Answer: autsomes
[EX A]: What term describes all but the sex chromosomes?

[EX Q]: Passage: Membranes Biological membranes surround cells and serve to keep the insides separated from the outsides. They are formed of phospholipid bilayer1 s, which by definition are a double layer of fatty acid2 molecules (mostly phospholipid3 s, lipids containing lots of phosphorus). Proteins4 serve very important functions in cellular membranes. They are active transports in and out of the cell, acting as gatekeepers. They relay signals in and out of the cell. Proteins are the site of many enzymatic reactions in the cell, and play a role in regulation of cellular processes. Answer: biological membranes
[EX A]: What is it that surrounds cells and serve to keep the insides separated from the outsides?

[EX Q]: Passage: The population is an important unit in ecology as well as other biological sciences. How is a population defined, and what are the strengths and weaknesses of this definition? Are there some species that at certain times or places are not in populations?. Answer: cell division
[EX A]:
During interphase, the cell undergoes normal growth processes while also preparing for what, by accumulating energy and building blocks of dna?