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Assertion: Algae shown only anisogamous ...

Assertion: Algae shown only anisogamous type of reproduction.
Reason: In algae, gametes can never be non flagellated.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

if both assertion and reason are true but reason is not the correct explanation of assertion

C

if assertion is true but reason is false.

D

if both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
Sexual reproduction in algae takes place thorugh fusion of two gametes. These gametes can be flagellated and similar in size (as in Chlamydomonas) or non-flagellanted (non-motile) but similar in size (as in Spirogyra). Such reproduction is called isogamous.
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Isogamous reproduction and flagellated gametes can be observed in

Which of the following algae shows physiological anisogamous type of sexual reproduction by involvement of non-motile gametes?

Knowledge Check

  • In anisogamous type of sexual reproduction in algae

    A
    Fusion takes place between morphologically and physiologically distinct gametes
    B
    Fusion takes place between morphologically similar and physiologically distinct gametes
    C
    Fusion takes place between physiologically similar and morphologically distinct gametes
    D
    Fusion of two gametes of same mother cell

  • Which green algae shows only oogamous type sexual reproduction ?

    A
    Ulothrix
    B
    Volvox
    C
    Spirogyra
    D
    Chlamydomonas

  • Assertion: Isogamy is a primitive type of sexual reproduction. Reason: The gametes are of diferent sizes.

    A
    If both the assertion and the reason are true and the reason is a correct explanation of the assertion
    B
    If both assertion and reason are true but the reason is not a correct explanation of the assertion
    C
    If the assertion is true but the reason is false
    D
    If both the assertion and reason are false

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    Read the following statements.(a) Algae are primary producers of energy rich compounds . PR (b) Marine algae are producers of hydrocolloids. PR (c) Stipe which is the leaf like photosynthetic organ is found in Ectocarpus . PR (d) Chlamydomonas shows only isogamous type of sexual reproduction. PR (e) Atlantic Ocean's sargasso was named after one of the brown algae. Select the correct option:

    Assertion (A): Budding, fragmentation and regeneration are all considered as asexual types of reproduction. Reason (R) : They involve only one parent.

    Assertion: Green algae best exhibit the origin and evolution of sexual reproduction. Reason: Green algae are most primitive algae.

    Type(s) of the sexual reproduction found in red algae is/are

    Assertion: Sexual reproduction of Spirogyra is isogamous type. Reason: Both of the fusing gametes of Spirogyra are nonglagellated and similar in size.

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