Question: 133. 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:
(1) A, B, C and D only
(2) B, C, D and E only
(3) A, C, D and E only
(4) A, B, C and E only
Answer: Option (3)
Explanation:
Members of Phaeophyceae commonly reproduce asexually by biflagellate zoospores,
so statement A is correct.
Sexual reproduction in Phaeophyceae can be isogamous, anisogamous, or oogamous,
and not only oogamous, hence statement B is incorrect.
The stored food material in Phaeophyceae is carbohydrate in the form of mannitol or laminarin,
so statement C is correct.
The major photosynthetic pigments present are chlorophyll a, chlorophyll c, carotenoids
and xanthophylls such as fucoxanthin, making statement D correct.
The vegetative cell wall is mainly cellulosic and is usually covered externally by
a gelatinous coating of algin, so statement E is also correct.
Therefore, the correct set of statements is A, C, D and E only.