An example of a colonial alga is

In $Ulothrix$ / $Spirogyra$,the reduction division (meiosis) occurs at the time of:

The cell wall of $Spirogyra$ is made up of

Sexual reproduction in $Spirogyra$ is morphologically characterised by

Which is the dominant phase in the life cycle of algae?

Algae are known to reproduce asexually by a variety of spores under different environmental conditions. Name these spores and the conditions under which they are produced.