Given a scientific passage and an answer, generate a question for the given answer.
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Question: Passage: An ecosystem includes the living organisms (all the populations) in an area and the non-living aspects of the environment ( Figure below ). An ecosystem is made of the biotic and abiotic factors in an area. Answer: ecosystem

Answer: What includes the living organisms in an area and the non-living aspects of the environment?

Question: Passage: In eukaryotic cells, the DNA is kept in the nucleus. The nucleus is surrounded by a double membrane called the nuclear envelope. Within the nucleus is the nucleolus. Answer: nucleus

Answer: In eukaryotic cells, where is the dna kept?

Question: Passage: Ponds and lakes may get their water from several sources. Some falls directly into them as precipitation. Some enters as runoff and some from streams and rivers. Water leaves ponds and lakes through evaporation and also as outflow. Answer: outflow

Answer:
Water leaves ponds and lakes through evaporation and also as what?