Answer: e. generation time
Explanation:
The generation time is the time that is required by the bacterial cell or cell of the any other organism required to be doubled in number during a specified or constant period of time. The generation time can vary in different organisms.
For example, the E.coli cell divides in every 20 minutes, hence, the generation time of the E.coli is 20 minutes and for the Staphylococcus aureus it is seen as 30 minutes.
I believe Interphase occupies approximately -90%- of the cell cycle.
The central sleep apnea is a condition, in which the person rapidly stops and starts breathing during the sleep.
The condition of the central sleep apnea is due to the change in the signaling pattern during the time of sleep. During this process, the respiratory centers present in the brain do not respond well and sometimes do not send signals to the muscle responsible for respiration.
Hence, the given blank can be filled with central sleep apnea.