Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms.
Correct answer: D. Presence of vessel elements and absence of archegonia
- A. Perianth and two integuments
- B. Embryo development and apical meristem
- C. Absence of resin duct and leaf venation
- D. Presence of vessel elements and absence of archegonia
Explanation
(d) : In gymnosperm except Order Gnetales (Gnetum) xylem consist of xylem parenchyma and tracheids with bordered pits but lacks vessels. So, Gnetales are the most advanced among gymnosperms. They lack archegonia in female gametophyte thus showing similarity with angiosperm and act as connecting link between the two
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About Kingdom Plantae
Plants are multicellular, photosynthetic eukaryotes with cellulose cell walls, chloroplasts and large vacuoles. Coverage includes alternation of generations, vascular and non-vascular plants, seedless and seed-producing groups, gymnosperms and angiosperms, and the distinction between monocot and dicot features.
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