A Graduate Student Filtered a Liter of Seawater Using a Millipore

question 45

Multiple Choice

A graduate student filtered a liter of seawater using a Millipore filter membrane of 2 $\mu$ m pore size. Which of the following is true about his filtrate?

• A) It is sterile.
• B) Microplanktons are present.
• C) Contains picoplanktons.
• D) The filtrate contains nanoplanktons.
• E) None of the above.

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