Question

Mitotic apparatus is absent in
a. Green algae
b. Fungi
c. Bacteria
d. Higher plants

Answer 1

Hint: All living organisms are made of cells which are the basic unit of life. Cells divide actively which is an important process. During cell division DNA replication takes place along with cell growth. The replicated DNA is distributed to daughter nuclei by a complex series of events during division under the genetic control.

Complete answer:
Mitosis is called equational division in which the chromosome number of the parent is conserved in the daughter cell. It has four phases such as Prophase, Metaphase, Anaphase, and Telophase.
Mitotic apparatus is the structure formed during mitotic cell division in order to split or separate the sister chromatids in between the daughter cells.

> Green algae undergo mitotic division as seen through the microscopes therefore mitotic apparatus is present in the green algae. The chloroplast thickens during division and centrioles and microtubules are along with the nuclei that divide. These are not associated with the nuclei that do not divide.

> Fungi also undergo mitosis which occurs in its vegetative phase. It is similar with the mitotic divisions of the higher organisms. In fungal mitosis the nuclear envelope remains intact as it is.

> Bacteria are prokaryotes and are single celled organisms where the cell is not having a true nucleus. The organelles are not even distinct and the bacterial cell division is not mitotic. Chromatin fibres do not condense and the cell division takes place by a simpler way.
It undergoes such cell division where there is no spindle formation. Cytoplasm simply divides along with karyokinesis becoming two individual bacterial cells.

> Higher plants also undergo mitotic division. The first phase is the exact copy of the mitotic divisions in animals. Hence mitotic apparatus is present in the higher plants too.

The correct answer is option (C).

Note: Mitosis is a process of cell division in which a single cell divides to form two daughter cells which are identical. The function of mitosis is to promote growth and enhance the power of replacing the tissues that are worn out. DNA replication occurs in both mitosis and meiosis and the common aim of both the processes is to divide the nucleus and its DNA equally within the newly formed daughter cells.