Q.What is senescent phase of life ?

Senescence is the last phase of an organism's life cycle, following the juvenile and reproductive phases, marked by progressive physiological decline leading to death.

The life span of most organisms is divided into three broad phases: the juvenile phase (growth and development to maturity), the reproductive phase (during which the organism is capable of sexual reproduction), and the senescent phase, which follows the reproductive phase. During senescence, metabolic rate slows, the body's ability to repair and maintain tissues declines, immune function weakens, and various organ systems gradually lose efficiency, ultimately culminating in the natural death of the …