교과서 질문
Draw one eukaryotic chromosome as it would appear during interphase, during each of the stages of mitosis, and during cytokinesis. Also, draw and label the nuclear envelope and any microtubules attached to the chromosome(s).
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11. Cell Division
Cytokinesis
Multiple Choice
How does cytokinesis differ in plant and animal cells?
A
In plant cells, cytokinesis involves the formation of a cleavage furrow, while in animal cells, a cell plate forms.
B
In plant cells, cytokinesis occurs through binary fission, while in animal cells, it occurs through mitosis.
C
In both plant and animal cells, cytokinesis involves the formation of a cell wall.
D
In plant cells, a cell plate forms, while in animal cells, a cleavage furrow forms.
검증된 단계별 안내1
Understand that cytokinesis is the process of cytoplasmic division that follows the end of mitosis, resulting in two daughter cells.
Recognize that in animal cells, cytokinesis is characterized by the formation of a cleavage furrow. This furrow is created by a contractile ring composed of actin and myosin filaments that constrict the cell membrane, eventually pinching the cell into two separate cells.
In contrast, plant cells have a rigid cell wall that prevents the formation of a cleavage furrow. Instead, plant cells undergo cytokinesis by forming a cell plate at the center of the dividing cell.
The cell plate in plant cells is formed by the fusion of vesicles derived from the Golgi apparatus. These vesicles coalesce at the center of the cell, gradually developing into a new cell wall that separates the two daughter cells.
Summarize the key difference: In plant cells, a cell plate forms during cytokinesis, while in animal cells, a cleavage furrow forms. This distinction is due to the presence of a rigid cell wall in plant cells, which necessitates a different mechanism for cell division.
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