Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
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Question: Question: In hornworts, the horns are the sporophytes that rise up from what? Answer: the leaflike gametophyte

Answer: Jason Hollinger. In hornworts, the horns are the sporophytes that rise up from the leaflike gametophyte . CC BY 2.0.

Question: Question: Which kind of irrigation uses much less water than other methods? Answer: drip

Answer: Drip irrigation uses much less water than other methods.

Question: Question: What happens to the total energy of the system when heat is positive? Answer: it increases

Answer:
When heat is positive, the total energy of the system is increasing.