Final answer:
Moon Trees, grown from seeds taken to the Moon during Apollo 14, symbolize America's scientific contributions to lunar understanding. Textual evidence of their significance may be in NASA's records, plaques, or historical accounts of the Apollo missions.
Step-by-step explanation:
The query regarding "Moon Trees" as a symbol of America's scientific endeavors relates to the saplings that were germinated from seeds taken to the Moon by Apollo 14 astronaut Stuart Roosa. Once the seeds returned to Earth, they were planted and the trees grew in various locations across the United States. Textual evidence to support the inference that these trees became a symbol of America's contribution to understanding the moon could be found in various publications and records that recount the journey of the seeds to the Moon, their return to Earth, and their subsequent growth into fully-grown trees. These Moon Trees are living commemorations of the Apollo missions and symbolize the unity of space exploration with life on Earth. Moreover, the preservation and promotion of these trees by NASA and other organizations demonstrate their significance as a representation of American ingenuity and the quest for knowledge about the Moon and beyond. Unfortunately, specific textual evidence was not provided, but one might consider looking for quotes from NASA officials, plaques at the sites of the trees, or mentions in historical accounts of the Apollo missions.