Recently, Russian scientists dug out the old squirrel hole and found the plant remains 38 meters below the surface. Back at the lab, the team fed nutrients to tissue from three of the fruits to grow shoots. Then the scientists transferred the shoots to pots filled with soil. The plants produced seeds that could be used to grow even more of them.

　　It’s important for scientists to know that plant tissues can still be revived after being frozen for a long time. That’s because many researchers are trying to preserve the seeds of modern plants by freezing them and then storing them in giant lockers at various spots around the globe. One such endeavor, an underground facility in Norway, is called the Svalbard Global Seed Vault. It stores hundreds of thousands of frozen seeds. If a plant ever goes extinct, scientists could bring it back by taking its seeds from the Svalbard or other storage lockers.

　　“No one knows how long they are able to live for, but freezing is basically the format for many plant conservation attempts nowadays.” Shen-Miller said. It’s a good thing that at least some plants are tough enough to survive the experience.

　　31. How did the fruit originally get underground?

　　A. It was placed there by an animal.

　　B. It was trapped there during the ice-age.

　　C. It was planted there by ancient farmers.

　　D. It was buried there after the earthquake.

【2016届高考英语二轮阅读理解九十天强化训练：47】相关文章：

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第17组（含解析）

★ 浙江省湖州市2014高考英语阅读理解一轮（暑假）精炼（4）含答案

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (8)

★ 【三维设计】2017届高考英语（江苏专用）二轮复习完形填空解题技法示范课件：4

★ 常熟市2014高考英阅读理解语一轮（暑假）训练题（6）及答案

★ 2017高考四川省广安市英语阅读理解一轮系列训练：2（含解析）

★ （全国通用）2014届高考英语一轮单元复习 限时强化训练一

★ 2017高考四川省广安市英语阅读理解一轮系列训练：13（含解析）

★ 2017届高考英语二轮复习课时训练：8（含解析）

★ 湖南省岳阳市2014高考英语一轮单项选择训练题（16）及答案