Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Mercury is the name of the smallest planet in our solar system, which is also nearest to the sun.

Answer: What is the name of the smallest planet in our solar system, which is also nearest to the sun?


Question: The active transport of ions across the membrane causes an electrical gradient to build up across the plasma membrane.

Answer: The active transport of ions across the membrane causes an electrical gradient to build up across the what?


Question: Body weight of the following traits is most influenced by the environment.

Answer:
Which of the following traits is most influenced by the environment?