In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: What is essential for forming new genes? Answer: large mutations

A: Large mutations is essential for forming new genes.
****
Q: Question: What state of matter takes neither the shape nor the volume of its container? Answer: solid

A: Solid takes neither the shape nor the volume of its container.
****
Q: Question: What is the critical factor for the survival of segmented worms? Answer: water and humidity

A:
Water and humidity is the critical factor for the survival of segmented worms.
****