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?
A)They have circular chromosomes that are segregated by attachment to the plasma membrane.
B)They have circular chromosomes that are segregated by attachment to spindle microtubules.
C)Chromosomes are not condensed during nuclear division.
D)The nuclear envelope remains intact during division.

Question

Quizplus · Accepted Answer

The nuclear envelope remains intact during division in diatoms and some yeasts, which is a characteristic feature of their nuclear division. This contrasts with the typical mitotic process in most eukaryotes, where the nuclear envelope breaks down.

Diatoms and Some Yeasts Are Unicellular Eukaryotes That Have Mechanisms