The unique 'holdfast' structure in certain Phaeophyceae primarily serves what purpose in their challenging intertidal habitats?
Nutrient absorption from the surrounding water
Anchoring to the substrate against strong wave action
Photosynthesis by increasing surface area
Reproduction by producing motile spores
Related Questions
Which of the following algae are suitable for human consumption?
Spirulina
Pfiesteria
Gymnodinium
Alexandrium
In brown algae asexual reproduction takes place by
Zoospores and aplanospores
Binary fission
Budding
Conjugation
Select the correctly matched ones.
I. Phaeophyceae - Mannitol
II. Rhodophyceae - Dictyota
III. Chlorophyceae - Non-motile gametes
IV. Rhodophyceae - r-phycoerythrin
I, II and III
II, III and IV
I and III
I and IV
In brown algae, brown colour is due to presence of
Carotenoids
Fucoxanthin
Phycoerythrin
Chlorophyll
Which of the following is the major pigment responsible for the brown color of Phaeophyceae?
Chlorophyll a
Chlorophyll b
Phycoerythrin
Fucoxanthin
Iodine is found in algae
Ulva
Ulothrix
Chlorella
Laminaria
The complex life cycle of Laminaria involves an alternation of generations. Which statement accurately describes the dominant phase and its ploidy?
The gametophyte is dominant and haploid.
The sporophyte is dominant and diploid.
Both gametophyte and sporophyte are equally dominant and diploid.
The gametophyte is dominant and diploid.
The cell wall of Phaeophyceae is composed of:
Cellulose and pectin
Cellulose and algin
Chitin
Peptidoglycan
In addition to chlorophyll a, brown algae posses
Chlorophyll b
chlorophyll c
Chlorophyll d
Chlorophylle
The members of brown algae (class-Phaeophyceae) have gelatinous coating outside the, cellulosic cell wall called
Algin
Glycoalgin starch
Polyalginate
Polyolefin
