Question

1. explain why mitosis is essential for growth and repair in multicellular organisms. use an example of a specific tissue or organ to support your answer. (3t)
2. predict what would happen if a stem cell in the early embryo failed to specialize properly. how would this affect the developing organism? (2t)

Explanation:

1. Mitosis is essential for growth and repair as it allows cells to divide and produce new cells. For example, in the human skin, when there is a cut, mitosis occurs in skin - cells to replace the damaged cells and heal the wound. Skin is a tissue that relies on mitosis for repair. 4. If a stem cell in the early embryo fails to specialize properly, it could lead to developmental disorders. Stem cells are responsible for differentiating into various cell - types that form different tissues and organs. For instance, if a neural stem cell fails to specialize correctly, it could affect the development of the nervous system, potentially leading to neurological problems in the developing organism.

Answer:

1. Explanation: Mitosis is crucial for growth and repair as it generates new cells. Example: Skin - cell mitosis for wound healing. Tissue: Skin.
2. If a stem cell in the early embryo fails to specialize properly, it can cause developmental disorders, such as potential neurological problems if neural stem - cell specialization is faulty.