Diatoms and some yeasts are unicellular eukaryotes that have mechanisms of nuclear division?

The given question is incomplete, the correct and complete question is  given as follows:

Diatoms and some yeasts are unicellular eukaryotes that have mechanisms of nuclear division that may resemble intermediate steps in the evolution of mitosis. Which of the following is a characteristic feature of nuclear division in these organisms?

The correct answer would be - The nuclear envelope remains intact during division.

Explanation:

Diatoms and some of the yeast are reproduce asexually by cell divisions that are similar to the steps or stages of the mitosis cell division as it also give rise to two daughter cell.

Each diatom daughter cell get one of the copy of valve and furrowing is the reproduction process. All the steps are similar however the major characteristic feature is that nuclear division it remains intact during division.

Thus, the correct answer is - The nuclear envelope remains intact during division.

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