Question

comparison of mitosis and cytokinesis in animal versus plant cells reveals:
select one:
a. both plants and animal cells utilize actin and myosin interactions for cytokinesis.
b. in animal cells, chromosomes do not become attached to the spindle until anaphase, whereas chromosomes become attached to the spindle at prophase in the plants.
c. the nuclear envelope disintegrates in prophase in animal cells, but remains intact in plant cells.
d. a cleavage furrow is initiated in an animal cell, while a cell plate begins to form in plant cells during telophase.

Explanation:

• Option a: Incorrect. Only animal cells use actin-myosin for cytokinesis (cleavage furrow); plant cells use cell plates.
• Option b: Incorrect. Chromosomes attach to spindles at metaphase (via kinetochores) in both cell types.
• Option c: Incorrect. Nuclear envelope disintegrates in prophase for both animal and plant cells.
• Option d: Correct. Animal cells form a cleavage furrow during cytokinesis, while plant cells form a cell plate (from Golgi vesicles) in telophase.

Answer:

d. A cleavage furrow is initiated in an animal cell, while a cell plate begins to form in plant cells during telophase.