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Why is phosphorus important for the formation of life?
Why is phosphorus important for the formation of life?
admin
2021-08-12
27
问题
Why is phosphorus important for the formation of life?
A new study suggests lightning strikes that hit Earth after its formation may have unlocked a necessary chemical element to support the beginning of life. Researchers say the lightning may have supplied enough phosphorus to Earth during the first billion years after the planet was formed. Scientists believe life started on Earth about 3.5 to 4.5 billion years ago. Phosphorus is an important element for the formation of life. It helps form cell structures and supports DNA, the material present in nearly all living organisms. But on early Earth, phosphorus is believed to have been locked inside minerals that cannot dissolve in water.
选项
A、It brings light and heat to the world.
B、It provides a special kind of nutrition.
C、It helps produce the needed energy.
D、It helps form cell structures and supports DNA.
答案
D
解析
题目问的是为什么磷对生命的形成至关重要。根据新闻可知,磷是形成生命的重要元素,它能帮助形成细胞结构并支持DNA。故答案为D。
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本试题收录于:
C类竞赛(非英语专业本科)题库大学生英语竞赛(NECCS)分类
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C类竞赛(非英语专业本科)
大学生英语竞赛(NECCS)
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