Each sub-phase of M-phase can be distinguished and identified very easily now as each sub-phase shows certain characteristics features.
In the given question, the chromosomes are divided at the end that is they have been distributed to the poles of the cells, appear shaped liked lines and the nuclear envelope starts to appear around them as well as the nucleolus.
This sub-phase of the M-phase is known as the "Telophase". Cells during Telophase are characterized by having nuclear membrane formation and other characteristics mentioned in the cells support that the cell is in Telophase.
Autoinducer molecules are signalling molecules that need bacteria. In order for the autoinducer molecules to signal, the bacteria must find a way to initiate the signal and a way to respond to the signal it had created. Autoinducer molecules increase in production as the density of the bacteria cell increases.
And the characteristics of the compound is different from its constituents. E.g taste of soap is different from its constituents like palm oil, soda, fragrance etc
Other compounds are water, caustic soda, limestone etc
