Question

Anastral mitosis and astral mitosis is seen in _______ and________ respectively.
(a)Animal cells and plant cells
(b)Animal cells and animal cells
(c)Plant cells and plant cells
(d)Plant cells and animal cells

Answer 1

Hint: One of them has cells that contain chloroplast and a large centralized vacuole and in the other cells don't have chloroplast but have small vacuoles. One of them is autotroph while the other is a heterotroph.

Complete answer:
During metaphase when the chromosomes are aligned at the center of attachments to spindle fibers half the way. The spindle fiber equally divides the chromosome in parental cells into two daughter cells during both types of nuclear division: mitosis and meiosis. When the spindle fibers form but no centrioles or asters are observed, plant cells are devoid of centriole thus showing anastral mitosis. Whereas, when the spindle fibers form from the centrioles is termed as astral mitosis, as animal cells have centrioles this shows astral mitosis.

Additional Information:
-Anastral Mitosis
-These fibers characteristic features in the higher plant as they lack centrioles.
-Studies show that these microtubules appear to be nucleated from near the nuclear envelope.
-Astral Mitosis
-These fibers appear immediately before mitosis.
-These fibers are those microtubules arising from the centrosomes which do not connect to the kinetochore.
-These are required to ensure the support of the process but not for the progression of mitosis.
-The integrity of chromosomes determines the maintenance of astral microtubules.

So, the correct answer is, ‘Plant cells and animal cells.’

Note: -The spindle apparatus or mitotic spindle associates with eukaryotic cells and helps in separating sister chromatids between daughter cells.
-The spindle fibers appear from opposite poles of the cell that couples opposing tension forces.