Differentiate between red algae and brown algae

(i) Red algae and brown algae Red algae Brown algae 1. Red algae are grouped under the class Rhodophyceae. 1. Brown algae are grouped under the class Phaeophyceae. 2. They contain floridean starch as stored food. 2. They contain mannitol or laminarin as stored food. 3. They contain the photosynthetic pigments chlorophylls a and d, and phycoerythrin. 3. They contain the photosynthetic pigments chlorophylls a and c, and fucoxanthin. 4. Their c ell walls are composed of cellulose, pectin, and phycocolloids. 4. Their c ell walls are composed of cellulose and algin. 5. Flagella are absent 5. Two flagella are present (ii) Liverworts and moss Liverworts Moss 1. They have unicellular rhizoids. 1. They have multicellular rhizoids. 2. Scales are present very often 2. Scales are absent 3. They are generally thalloid, with dichotomous branching. 3. They are foliage, with lateral branching. 4. Gemma cups are present 4. Gemma cups are absent 5. Sporophyte has very little photosynthetic tissue 5. Sporophyte has abundant photosynthetic tissue (iii) Homosporous and heterosporous pteridophyte Homosporous pteridophytes Heterosporous pteridophytes 1. They bear spores that are of the same type. 1. They bear two kinds of spores – microspores and megaspores. 2. They p roduce bisexual gametophytes. 2. They p roduce unisexual gametophytes. (iv) Syngamy and triple fusion Syngamy Triple fusion 1. It is the process of fusion of the male gamete with the egg in an angiosperm. 1. It is the process of fu...

Red Algae Brown Algae The cell wall is made of cellulose. pectin and phycocolloids The cell wall is made of cellulose and algin Photosynthetic pigments are chlorophyll a, chlorophyll d and phycoerythrin Photosynthetic pigments are chlorophyll a. chlorophyll c and fucoxanthin Classified under the class Rhodophyceae Classified under the class Phaeophyceae Stored form of food in floridean starch Stored form of food in laminarin or mannitol Examples include Porphyridium, Chondrus Examples include Fucus, Ectocarpus

Red algae Brown algae 1 Red algae are grouped underthe class Rhodophyceae. Brown algae are grouped underthe class Phaeophyceae. 2 They containfloridean starch as stored food They containmannitol or laminarin as stored food. 3 They contain thephotosynthetic pigments chlorophylls a and d, and phycoerythrin. They contain thephotosynthetic pigments chlorophylls a and c, and fucoxanthin. 4 Their cell walls are composed of cellulose, pectin, and phycocolloids. Their cell walls are composed of cellulose and algin. 5 Flagella are absent Twoflagella are present 6 Thylakoids are unstaked Thylakoids occur in group of three