Scalariform conjugation occurs in

Which of the following algae produces carpospores?

Which of the following algae has a filamentous structure?

Apart from chlorophyll,algae have several other pigments in their chloroplasts. Which pigments are found in blue-green algae $(BGA)$,red algae,and brown algae,that are responsible for their characteristic colours?

What does $''Y''$ represent in the given chart?

The product of conjugation of $Spirogyra$ is called