You are given a question, its answer, and a sentence that supports the question, i.e., the answer to the question is inferable from the sentence. In this task, you need to paraphrase the given sentence so that the paraphrased sentence still supports the question i.e. you can still infer the answer to the question from the paraphrased sentence. Do not write a paraphrase with a minor change in the given sentence e.g. replacing the word "one" with "a". Instead, try to write a paraphrase that contains new words, i.e. the words that are not present in the input sentence.
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Question: Question: What is the name for a tool commonly used by molecular biologists to place genetic material into cells? 
Answer: a viral vector. 
Sentence: A viral vector is the name for a tool commonly used by molecular biologists to place genetic material into cells.

Answer: A tool called a viral vector is commonly used by molecular biologists' to place genetic material into cells.


Question: Question: If the buoyant force is greater than the force of gravity acting on a ship, what will happen to the ship? 
Answer: it will float. 
Sentence: If the buoyant force is greater than the force of gravity acting on a ship, it will float.

Answer: A ship can only float when the buoyant force is greater than the force of gravity acting on that ship.


Question: Question: Which human organ system produces hormones to regulate growth, development, and reproduction? 
Answer: endocrine. 
Sentence: The endocrine system produces hormones to regulate growth, development, and reproduction.

Answer:
By producing hormones, the endocrine system regulates growth, development, and reproduction.