Question

Senescent phase of an organism's life span can be recognized by

• A. slow metabolism
• B. cessation of reproduction
• C. decreased immunity
• D. all of these.

Answer 1

The correct option is D all of these.

An organism undergoes birth, growth phase, senescence, ageing and death during its life span. Growth phase is characterised by a continuous growth.
During Senescence, the growth decreases, metabolism slows down, reproductive capability is lost and the immunity decreases. Senescence leads to ageing and finally death.