Which is the oldest birds ? Important question for neet

Examination cell the unit of life and cell cycle

Albatross is the oldest bird.

refer to the following link for notes on cell cycle.
https://www.askiitians.com/biology/cell-cycle-and-cell-division/

for chapter cell
https://www.askiitians.com/biology/cell-the-unit-of-life/

Many important questions are asked from these two chapters. You can refer to previous year questions