Question

define Rhodophyceae ......​

Answer 1

These algae has chlorophyll a and d and phycoerythrin are present. It imparts red colour. And are also called ‘red algae’.

Answer 2

class of chiefly marine multicellular algae (division Rhodophyta) comprising algae in which red phycoerythrin and sometimes blue phycocyanin mask the chlorophyll, in which no motile form or stage exists, and in which there is a well-marked and often complex alternation of generations — compare red alga.