HORTICULTURE SCIENCE
PLANT BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They exhibit extensive branching of xylem and phloem.
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It is the only group that shows an alternation of generations.
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The sporophyte (diploid) is the dominant stage.
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They lack a vascular system and water and nutrients must be passed from cell to cell by diffusion.
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Detailed explanation-1: -They grow directly out of the fertilized egg in the archegonia, and remain dependent on the parent gametophyte for their nutrition. Hence the correct option is D.
Detailed explanation-2: -Most bryophytes are small. They not only lack vascular tissues; they also lack true leaves, seeds, and flowers. Instead of roots, they have hair-like rhizoids to anchor them to the ground and to absorb water and minerals (see Figure below).
Detailed explanation-3: -Therefore, “zygote undergoes meiosis” is the false statement about bryophytes.
Detailed explanation-4: -Bryophytes is the informal group name for mosses, liverworts and hornworts. They are non-vascular plants, which means they have no roots or vascular tissue, but instead absorb water and nutrients from the air through their surface (e.g., their leaves).