Final answer:
During interphase in whitefish blastula, the cells are not undergoing mitosis but are in a period of growth and preparation for cell division. The cells appear as regular, round cells with visible nuclei and cytoplasm. The chromosomes are not visible, and the cells may appear larger compared to cells in mitotic stages.
Step-by-step explanation:
In a prepared microscope slide of whitefish blastula cross-sections, interphase cannot be visually distinguished from the other stages. However, the mitotic stages of the cell cycle can be easily identified.
During interphase, the cells in whitefish blastula are not undergoing mitosis. Instead, they are in a period of growth and preparation for cell division. This is the longest phase of the cell cycle where the cell duplicates its DNA and prepares for division.
In a microscope image, cells in interphase appear as regular, round cells with visible nuclei and cytoplasm. The chromosomes are not visible, and the cells may appear larger compared to cells in mitotic stages.