Mitosis and cytokinesis is needed in multicellular organisms in order to
a
Replicate DNA.
b
Increase genetic diversity.
c
Grow, repair and replace old or damaged cells.
d
Produce gametes (sperm or eggs).
c
Grow, repair and replace old or damaged cells.
c
Grow, repair and replace old or damaged cells.
The correct answer is option c: Grow, repair and replace old or damaged cells.
Explanation:
Mitosis is a process of cell division that occurs in the body of multicellular organisms. It allows cells to replicate themselves by producing two identical daughter cells with the same number of chromosomes as the parent cell. Mitosis is essential for growth, as it allows organisms to increase the number of cells in their body.
Cytokinesis, on the other hand, is the process that follows mitosis and involves the division of the cytoplasm to form two separate cells. It completes the process of cell division by separating the replicated genetic material into two daughter cells, each with its own nucleus.
Together, mitosis and cytokinesis are necessary for the growth, repair, and replacement of cells in multicellular organisms. As cells age or become damaged, they need to be replaced to maintain the overall health and function of the organism. Mitosis allows for the production of new cells to replace old, damaged, or dying cells in tissues and organs.
Option a ("Replicate DNA") is partially correct, as mitosis does involve the replication of DNA. However, this process is not the primary purpose of mitosis in multicellular organisms.
Option b ("Increase genetic diversity") is incorrect, as mitosis does not lead to an increase in genetic diversity. In fact, mitosis produces genetically identical daughter cells with the same genetic information as the parent cell.
Option d ("Produce gametes (sperm or eggs)") is also incorrect. Mitosis is not involved in the production of gametes; instead, a specialized process called meiosis is responsible for gamete production.