Question

why is mitosis important for tissue repair?
a. it decreases the number of cells in a tissue.
b. it produces new cells to replace damaged or dead cells.
c. it increases genetic diversity in cells.
d. it removes toxins from the cell.

which phase of mitosis follows anaphase?
a. cytokinesis
b. metaphase
c. telophase
d. prophase

what can result from the failure of mitosis?
a. decreased cell division rates.
b. enhanced tissue regeneration.
c. aneuploidy, cancer, or developmental defects.
d. increased genetic diversity.

which phase of mitosis is characterized by the separation of sister chromatids?
a. anaphase
b. telophase
c. prophase
d. metaphase

what is the significance of the nuclear envelope disintegrating during prophase?
a. it marks the end of mitosis.
b. it triggers the cell to enter cytokinesis.
c. it permits spindle fibers to access chromosomes.
d. it allows the nucleus to divide into two.

during which phase of mitosis do chromosomes align at the cells center?
a. telophase
b. prophase
c. metaphase
d. anaphase

why is mitosis crucial during development?
a. it creates genetic variation in offspring.
b. it ensures that cells divide correctly to form tissues and organs.

Explanation:

1. Mitosis is important for tissue repair as it produces new cells to replace damaged or dead cells. This is a fundamental role of mitosis in maintaining the integrity of tissues.
2. The phase of mitosis that follows anaphase is telophase. In the sequence of mitosis phases (prophase, metaphase, anaphase, telophase), telophase comes after anaphase where the separated chromosomes reach the poles of the cell.
3. Failure of mitosis can lead to aneuploidy, cancer, or developmental defects. Errors in chromosome segregation during mitosis can cause abnormal numbers of chromosomes (aneuploidy), and uncontrolled cell - division due to mitotic failures can contribute to cancer development and affect normal development.
4. The phase of mitosis characterized by the separation of sister chromatids is anaphase. During anaphase, the sister chromatids are pulled apart to opposite poles of the cell by the spindle fibers.
5. The significance of the nuclear envelope disintegrating during prophase is that it permits spindle fibers to access chromosomes. This breakdown allows the microtubules of the spindle apparatus to interact with the chromosomes for proper segregation.
6. Chromosomes align at the cell's center during metaphase. This alignment at the metaphase plate is crucial for proper chromosome segregation in the subsequent anaphase.
7. Mitosis is crucial during development as it ensures that cells divide correctly to form tissues and organs. It is responsible for the growth and proper organization of cells during embryonic and post - embryonic development.

Answer:

1. b. It produces new cells to replace damaged or dead cells.
2. c. Telophase
3. c. Aneuploidy, cancer, or developmental defects
4. a. Anaphase
5. c. It permits spindle fibers to access chromosomes.
6. c. Metaphase
7. b. It ensures that cells divide correctly to form tissues and organs.