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Question
Choose the right answer choice corresponding to the characteristics of gymnosperms from the options given below.
Choose the right answer choice corresponding to the characteristics of gymnosperms from the options given below.
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Solution
The correct option is D Both the male and female gametophytes do not possess free-living existence
The gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed before and after fertilization. Unlike bryophytes and pteridophytes, male and female gametophytes do not have independent free-living existence; instead, they are entirely dependent on sporophytes (main plant body differentiated into root, stem, and leaves). Gymnosperms are heterosporous, i.e., they produce haploid microspores and megaspores. The microspore develops into a male gametophyte called a pollen grain. The development of pollen grain takes place in microsporangia present on microsporophyll.
The gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed before and after fertilization. Unlike bryophytes and pteridophytes, male and female gametophytes do not have independent free-living existence; instead, they are entirely dependent on sporophytes (main plant body differentiated into root, stem, and leaves). Gymnosperms are heterosporous, i.e., they produce haploid microspores and megaspores. The microspore develops into a male gametophyte called a pollen grain. The development of pollen grain takes place in microsporangia present on microsporophyll.
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