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

[Q]: Passage: A drumlin is a long, low hill of sediments deposited by a glacier. Drumlins often occur in groups called drumlin fields. The narrow end of each drumlin points in the direction the glacier was moving when it dropped the sediments. Answer: a drumlin
[A]: What is the name of a long and low hill of sediments which have been deposited by a glacier?

[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
[A]: During interphase, the cell undergoes normal growth processes while also preparing for what, by accumulating energy and building blocks of dna?

[Q]: Passage: All living things depend on their environment to supply them with what they need, including food, water, and shelter. Their environment consists of physical factorssuch as soil, air, and temperatureand also of other organisms. An organism is an individual living thing. Many living things interact with other organisms in their environment. In fact, they may need other organisms in order to survive. This is known as interdependence . For example, living things that cannot make their own food must eat other organisms for food. Other interactions between living things include symbiosis and competition. Answer: interdependence
[A]:
What is the term for when organisms need other organisms to survive?