Multiple choice

Which of the following shows endosporic development of gametophyte?

  1. Selaginella

  2. Marchantia

  3. Porella

  4. Sphagnum
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A Correct answer
Explanation

A gametophyte develops within a spore. For example, the female gametophyte of Selaginella is contained within the megaspore and at maturity, only a portion, bearing the archegonia, is exposed through the spore wall. Such gametophytes are better able to withstand dry conditions and this pattern of development may be seen as a step in the evolution of the seed habit.

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