I do believe they made a mistake ???
<span>it is...................................diatoms</span>
A contractile vacuole<span> is a sub-cellular </span>organelle<span> involved in </span>osmoregulation<span>. It is found in </span>protists<span> and in </span>unicellular algae<span>.
</span>Plasmolysis<span> is the process where cells lose water in a </span>hypertonic<span> solution.</span><span>
</span>Crenation<span> from modern Latin </span><span>meaning scalloped or notched from popular Latin </span>crena<span> meaning notch
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Answer:
you won't find the nucleus in prokaryotic cells
