How does sexual reproduction occur in the members belonging to class Phaeophyceae?

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Solution

Sexual reproduction in Phaeophyceae:
Phaeophyceae is a class of brown algae.
They reproduce in three ways: vegetative, asexual, and sexual reproduction.
Vegetative reproduction takes place by fragmentation.
In most brown algae, asexual reproduction occurs by biflagellate zoospores which appear pear-shaped.
Sexual reproduction occurs through oogamous, isogamous, or anisogamous modes.
The majority of the members use external fertilization.
After germination, the zygote does not go through meiosis and generates a diploid thallus.

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Question 4
Offsprings which are formed by the asexual reproduction methods have greater similarity among themselves because

(i) Asexual reproduction involves only one parent
(ii) Asexual reproduction does not involve two gametes
(iii) Asexual reproduction occurs before sexual reproduction
(iv) Asexual reproduction occurs after sexual reproduction

(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

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What is the cell wall composition of members belonging to class phaeophyceae?

How does variation occur in sexual and asexual reproduction? Justify by giving one example for each.

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