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Question
In which of the following group, fertile cells are not enclosed by sterile cells?
In which of the following group, fertile cells are not enclosed by sterile cells?
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Solution
The correct option is A Thallophyta
The morphological distinction of Thallophyta markedly distinguishes this from Bryophyta, Pteridophyta and Spermatophyta. Besides the lack of differentiation of the plant body into stem, leaves and roots, the sex organs are unicellular. Even when multicellular, as in multicellular green algae, no embryo formation takes place and the thallus is capable of producing gametes. Unlike Bryophyta, since all cells are fertile in multicellular algae, the fertile cells do not have a sterile jacket layer or are not enclosed by sterile cells.
Thus, the correct answer is option A.
The morphological distinction of Thallophyta markedly distinguishes this from Bryophyta, Pteridophyta and Spermatophyta. Besides the lack of differentiation of the plant body into stem, leaves and roots, the sex organs are unicellular. Even when multicellular, as in multicellular green algae, no embryo formation takes place and the thallus is capable of producing gametes. Unlike Bryophyta, since all cells are fertile in multicellular algae, the fertile cells do not have a sterile jacket layer or are not enclosed by sterile cells.
Thus, the correct answer is option A.
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