Read the following statements and choose the set of correct statements:
In the members of Phaeophyceae,
A. Asexual reproduction occurs usually by biflagellate zoospores.
B. Sexual reproduction is by oogamous method only.
C. Stored food is in the form of carbohydrates which is either mannitol or laminarin.
D. The major pigments found are chlorophyll a, c and carotenoids and xanthophyll.
E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.Choose the correct answer from the options given below:
Correct Answer :
A, C, D and E only
Solution :
To identify the correct set of statements regarding the members of the class Phaeophyceae (brown algae), let us analyze each statement individually based on standard botanical principles:
Statement A: "Asexual reproduction occurs usually by biflagellate zoospores."
This statement is correct. In brown algae (Phaeophyceae), asexual reproduction typically takes place by pear-shaped (pyriform) zoospores that possess two unequal, laterally attached flagella.
Statement B: "Sexual reproduction is by oogamous method only."
This statement is incorrect. Sexual reproduction in Phaeophyceae can be isogamous, anisogamous, or oogamous. It is not restricted to the oogamous method only.
Statement C: "Stored food is in the form of carbohydrates which is either mannitol or laminarin."
This statement is correct. The reserve food materials in brown algae are complex carbohydrates, specifically laminarin or mannitol.
Statement D: "The major pigments found are chlorophyll a, c and carotenoids and xanthophyll."
This statement is correct. Brown algae possess chlorophyll a, chlorophyll c, carotenoids, and xanthophylls. The characteristic brown color is due to the presence of the xanthophyll pigment called fucoxanthin.
Statement E: "Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin."
This statement is correct. The vegetative cells of Phaeophyceae have a cellulosic cell wall, which is typically covered externally by a gelatinous sheath of a hydrocolloid called algin.
Analyzing all the statements, we find that statements A, C, D, and E are correct, while statement B is incorrect.
Therefore, the correct set of statements is A, C, D, and E only.
Access expert-curated educational resources and study materials—completely free.
Create, conduct, and manage professional online assessments with Mindyard. Perfect for teachers and institutes.
Copyright © 2026 Mindyard. All Rights Reserved.
