AP BIOLOGY

Detailed explanation-1: -Asexual reproduction in Spirogyra: Spirogyra is a type of filamentous green algae. It reproduces asexually by the method of fragmentation. In this method the parent Spirogyra after getting matured, splits up along their septum into tiny fragments.

Detailed explanation-2: -In spirogyra, asexual reproduction takes place by fragmentation, in which the filament breaks into several pieces. Each piece grows as a new individual. The vegetative filament transforms into a new filament following fragmentation.

Detailed explanation-3: -Spirogyra species can reproduce both sexually and asexually. Asexual, or vegetative, reproduction occurs by simple fragmentation of the filaments. Sexual reproduction occurs by a process known as conjugation, in which cells of two filaments lying side by side are joined by outgrowths called conjugation tubes.

Detailed explanation-4: -Fragmentation as a method of reproduction is seen in organisms such as filamentous cyanobacteria, molds, lichens, sponges, acoel flatworms, some annelid worms and sea stars.

Detailed explanation-5: -Fragmentation is a form of asexual reproduction where a fragment of the parent breaks off and develops into an entirely new but genetically identical individual. The parent will then regenerate, or regrow, the piece that broke off, so in the end there are two new individuals from one.