Explanation:
In member of rhodophyceae are presence of red pigment r-phycoerythrin in their body is known as red algae.
Rhodophyceae-group algae are capable of both sexual and asexual reproduction. The non-motile spores that eventually become the new cell body are created during asexual reproduction. The marging of the non-motile gamets to create the embryo, which then grows to form the new algal body, is the process of sexual reproduction.