56.
In cross section each centriole consists of a cylindrical array of how many microtubules?

57.
Which phase's intiation is indicated by the appearance of the chromosomes as thin threads in the nucleus?

58.
In which of these mitosis is missing and the cell divided by binary fission?

59.
Which event occurs during interphase?

60.
The stage of mitosis at which chromatids separate as independent chromosomes is the