Which of the following statements about Phaeophyceae is incorrect?

Vegetative reproduction occurs by fragmentation

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Asexual reproduction is by biflagellate pear- shaped zoospores

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In sexual reproduction, gametes are pyriform and bear

2

laterally attached flagella

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None of these

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Solution

The correct option is C None of these
Vegetative reproduction occur by fragmentation of thallus in many brown algae. Asexual reproduction takes place by pear-shaped biflagellate zoospores or aplanospores. Sexual reproduction ranges from isogamy oogamy through anisogamy. Gametes all bears 2 latterly attached flagella. Thus the correct answer is D.

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Similar questions

Q. Pick the option which includes all the correct statements from the following.

A. Chlorophyceae: Chlorophyll a and chlorophyll c pigments, starch-stored as food, asexual reproduction by zoospores.

B. Phaeophyceae: Fucoxanthin pigment, mannitol-stored as food, pear-shaped zoospores with 2, unequal sized apical flagella.

C. Rhodophyceae: Phycoerythrin pigment, floridean starch, reproduction by non-motile spore.

Q. New individuals formed by asexual method of reproduction have greater similarity among themselves because:
(i) Asexual reproduction involves only one parent.
(ii) Asexual reproduction does not involve gametes.
(iii) Asexual reproduction occurs before sexual reproduction.
(iv) Asexual reproduction occurs after sexual reproduction.

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)

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

Q. A few statements with regard to sexual reproduction are given below.
(i) Sexual reproduction does not always require two individuals.
(ii) Sexual reproduction generally involves gametic fusion.
(iii) Meiosis never occurs during sexual reproduction.
(iv) External fertilisation is a rule during sexual reproduction.

Choose the correct statements from the options below.

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