I think the correct answer from the choices listed above is option A. Tuber is considered as a modified stem. These type of stems carry out special functions that are important for the plant to survive. Tubers serves as a food reserve and bearing buds wherein new plants can grow.
        
             
        
        
        
Cancer
Keeping all aspects of life the same at all times
        
             
        
        
        
Answer:
Because chromosomes are highly condensed during mitosis
Explanation:
Chromosomes are structures of packed and organized DNA molecules together with proteins. They are only visible under a light microscope only when the cell is undergoing the metaphase of cell division ( aligned in the center-metaphase plate). In this phase chromosomes are in their condensed form and easiest to distinguish and study.
DNA replication occurs during the S phase of interphase, which is the phase before cell division.