In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
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Question: Question: Dana washes her hands a lot, so her bacteria has mutated to help to resist antibiotics. As that bacteria decreases in numbers, the mutation becomes 
 Answer: rare

Answer: Bacteria with a mutation the helps resist antibiotics increase in numbers, so the mutation becomes more common.


Question: Question: If an item has few carbon atoms its boiling point will be 
 Answer: low

Answer: Alkanes with more carbon atoms generally have higher boiling and melting points.


Question: Question: A decrease in food will likely lead to _____ lifespans. 
 Answer: shorter

Answer:
New farm machines were invented. They increased the amount of food that could be produced. With more food, people were healthier and could live longer.