Question

define Rhodophyceae........​

Answer 1

Answer :

Rhodophyceae –

• Rhodophyceae are commonly called red algae because of red pigment (r-phycoerythrin) found in their body.
• The major pigments found include chlorophyll a and chlorophyll d including phycoerythrin.
• The cell wall is made up of cellulose, pectin and polysulphate esters.
• There is no presence of flagella.
• Most of them are found in Marine conditions and then warmer areas.
• They are found in lighted regions in the the surface of the water and also in the depths of the water.
• The red thallus of the red algae are multicellular.
• Some of them have complex body organisation.
• The food is stored in the form of floridean starch.
• They reproduce vegetatively by fragmentation.
• They reproduce a sexually by non motile spores and sexually by non motile gametes.
• The sexual reproduction is oogamous.
• Examples include : Poryphyra, Gelidium, etc.

Answer 2

Rhodophyceae:-

• They belongs to red algae.
• They contains R-phycoerythrin pigment. So appears as red colour.
• Multi cellular Palace is common but some of them are with Complex organisation .
• The Major pigments of chlorophyll ab are phycoerythrins.
• Reserved food in floridean starch type which is analogous to amylopectin and glycogen .
• Cell wall is made up of cellulose pectin and polysulphate esters .
• Vegetative reproduction takes place by fragmentation .
• Asexual reproduction is by non motile spores .
• Sexual reproduction is male sex organ gives non flagellated male ye mat called spermatium. Female sex organ is flask shaped called as Carpogonium.