微生物（microorganism)形体微小、结构简单、肉眼看不见，必须借助光学显微镜或电子显微镜才能看清，微生物大小一般约（)。

A.形体微小

B.结构简单

C.分解能力特别强

D.分布广

The passage provides an answer to which of the following questions？

A．What is the explanation for the phenomenon of bioluminescence in marine life？

B．Does the phenomenon of plankton bioluminescence have any practical applications？

C．Why do only certain specimens of marine life exhibit the phenomenon of bioluminescence？

D．How does underwater bioluminescence differ from atmospheric bioluminescence？

E．What are the steps that take place as an individual microorganism becomes bioluminescent？