Parameters of senescence are: a) End of reproductive phase. b) Beginning of reproductive phase. c) Slowing of metabolism. d) Juvenile phase.

b, d. a, c.       a, d. a, b.

a, c.

Parameters of senescence or old age are end of reproductive phase and some concomitant changes in the body like slowing of metabolism. Juvenile phase is considered as a period of growth and maturity.