In $Gracilaria$,sexual reproduction is

In $Ulothrix$,the cell contains

The disease known as "Red Rust of Tea" is caused by $Cephaleuros$ which is a:

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?

The sexual reproduction in $Spirogyra$ is:

Which method of sexual reproduction is observed in the alga shown in the given figure?