In the following diagram, what does the question mark represent?

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Class 12 Biology Practice Test: Microbes in Human Welfare - Microbes — practice the complete quiz, review flashcards, or try a random question.

A microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells.


In the following diagram, what does the question mark represent?<br /><img src='https://www.fatskills.com/class12science/biology-questions-answers-microbes-q9.jpg' alt='Find the question mark represents in the rod-shaped bacterium' width='400' height='350' />