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Question

The ploidy of capsule, seta and rhizoids respectively in Funaria is


A

2n, n, 2n

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B

2n, n, n

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C

2n, 2n, n

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D

2n, 2n, 2n

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Solution

The correct option is C

2n, 2n, n


The correct option is C.

Explanation of the correct option:

  1. Funaria is moss and it belongs to the kingdom Bryophyta.
  2. Funaria keeps switching between the gametophytic division and sporophytic division phase.
  3. The capsule and seta belong to the sporophyte which undergoes meiosis to produce spores. Hence they are diploid (2n).
  4. On the other hand, rhizoids are gametophytic which means they are single-celled and hence they are haploid (n).

Explanation of the incorrect options:

Option A:

  1. Since capsule and seta belong to sporophyte division its ploidy is 2n.
  2. Rhizoids are gametophytic division and hence its ploidy is n.

Option B:

  1. Since capsule and seta belong to sporophyte division its ploidy is 2n.
  2. Rhizoids are gametophytic division and hence its ploidy is n.

Option D:

  1. Since capsule and seta belong to sporophyte division, its ploidy is 2n.
  2. Rhizoids are gametophytic division and hence its ploidy is n.

Final answer: The ploidy of capsule, seta, and rhizoids respectively in Funaria is 2n, 2n, n.


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