NEED ASAP What happens during prometaphase of mitosis?
A. the mitotic spindle begins to form as the centrosomes, which produce the spindles, move away from each other
B. the nuclear envelope begins to break down and the microtubule spindle fibers emerging from the centrosomes begin to enter the nuclear area of the cell
C. the sister chromatids begin to separate, moving towards opposite ends of the cell as the microtubular spindle fibers shorten
D. two nuclei develop and encompass the chromosomes at each end of the cell

I think maybe A ,sorry if wrong

During prometaphase of mitosis,the mitotic spindle is formed and the two halves of each duplicated chromosome are aligned on the metaphase plate

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white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.