Phaeophyceae (brown algae) Flashcards
Where are brown algae primarily found at ?
Marine habitat
Simply branched filamentous brown algae example
Ectocarpus
Profusely branched forms of brown algae , how much height do they reach?
Kelps , 100 meters
Pigments present in brown algae are (4):
Chlorophyll a , c , caretenoids , xanthophylls
some Brown algae are olive green in colour . True or false
True
Amount of which pigment in brown algae determines its colour , which of the 4 categories does it belong to ?
fucoxanthin; Xanthophyll
Form of food storage in brown algae
Complex carbohydrates such as mannitol and laminarin
Describe Cell wall of vegetative cells of brown algae
Cellulosic wall covered on outside by gelatinous coating of algin
protoplast of brown alage contains plastids , peripherally located vacuole and nucleus . true or false
False , centrally
The plant body of brown algae is attached to the substratum by___________
Holdfast
The stalk of brown algae is called
Stipe
What is frond ?
Leaf like photosynthetic organ in brown algae
Vegetative reproduction in brown algae takes place by __________
Fragmentatation
Describe asexual reproduction in brown algae
By biflagellated zoospores which are pear shaped and have two unequal laterally attached flagella
Sexual reproduction in brown algae is of all 3 types. true or false
True
Where does the union of gametes for oogamous brown algae take place?
1) within water
2) Within the oogonium
Describe the gametes of brown algae
Pyriform ( pear shaped ) and bear 2 laterally attached flagella
Examples of Brown algae:
Ectocarpus , dictyota , laminaria , sargassum , fucus
