Question

Spirogyra, despite being a multi-cellular organism, still shows a simple reproductive method. Select the correct option with regard to reproduction in Spirogyra:

Options

• Asexual reproduction by division of cells into two cells.

• Sexual reproduction by division of cells into many cells.

• Asexual reproduction by breaking up of Spirogyra filaments into smaller parts

• Sexual reproduction by the formation of gametes after meiosis of cells of filaments followed by fusion of male and female gametes.

Answer 1

Asexual reproduction by breaking up of Spirogyra filaments into smaller parts

Explanation:

Spirogyra reproduces asexually by fragmentation, in which its long filament breaks into smaller pieces upon maturity. Each fragment then grows into a new individual through cell division. This method is common in organisms with simple body plans in which specialised tissues are not required for regeneration.