7
Question
Which of the following plants are similar to amphibians in requiring water for fertilisation?
Which of the following plants are similar to amphibians in requiring water for fertilisation?
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Solution
The correct option is D Both A and B
The water is essentially needed for fertilization in Bryophytes and Pteridophytes. Mosses and ferns usually grow in damp places, because they produce spores, which on germinated produce a gametophyte, which then produces the gametes (sperm and eggs). The sperm must be able to swim and so need a damp environment. The antherozoids swim down the neck canal and one of these penetrates the egg within the archegonium. The resulting zygote (2n) divides repeating to form the embryo or young sporophyte. The developing young embryo draws its nourishment from the gametophyte. Hence the correct option is D.
The water is essentially needed for fertilization in Bryophytes and Pteridophytes. Mosses and ferns usually grow in damp places, because they produce spores, which on germinated produce a gametophyte, which then produces the gametes (sperm and eggs). The sperm must be able to swim and so need a damp environment. The antherozoids swim down the neck canal and one of these penetrates the egg within the archegonium. The resulting zygote (2n) divides repeating to form the embryo or young sporophyte. The developing young embryo draws its nourishment from the gametophyte.
Hence the correct option is D.
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