Textbook Question
An organism called a plasmodial slime mold is one large cytoplasmic mass with many nuclei. Explain how such a 'megacell' could form.
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11. Cell Division
Cytokinesis
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What occurs during cytokinesis?
A
The DNA is replicated in preparation for cell division.
B
The cytoplasm of a single eukaryotic cell divides to form two daughter cells.
C
The chromosomes align at the cell's equatorial plane.
D
The nuclear envelope breaks down and the spindle fibers form.
Verified step by step guidance1
Understand that cytokinesis is the final step in cell division, following mitosis, where the cytoplasm divides to form two separate daughter cells.
Recognize that cytokinesis is distinct from mitosis, which involves the division of the nucleus and the distribution of chromosomes into daughter nuclei.
Identify the key process of cytokinesis in eukaryotic cells, which involves the formation of a contractile ring composed of actin and myosin filaments that pinches the cell membrane to separate the cytoplasm.
Note that in animal cells, cytokinesis typically occurs through a process called cleavage, where the cell membrane is pinched inward until the cell is divided into two parts.
In plant cells, cytokinesis involves the formation of a cell plate that eventually develops into a separating wall between the two daughter cells.
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