Senescence in plants leads into . . . . . . of cells.

Differentiate between Senescence and Ageing.

Write a short note on: Development.

Which of the following best illustrates "feedback" in development?

$A$: Development is the emergence of a multicellular organism from a single group of cells.
$R$: Development involves growth,differentiation,and morphogenesis.

Assertion: Senescence is the time when age-associated defects are manifested.
Reason: Certain genes may be undergoing sequential switching on and off during one's life.