Quiz_Pteridophyta 1. If a sporangium developed from a group of cells it is called: Eusporangiate development Leptosporangiate development None of the above Heterosporangiate development Explanation:A sporangium that develops from a group of cells is called eusporangiate. This type of sporangium is typically larger and less specialized than leptosporangiate sporangia and is found in more primitive vascular plants. 2. Adaxial outgrowth from the base of the leaf of Selaginella is: Ligule Stipule Velum Trabeculae Explanation:The ligule is a small, adaxial outgrowth found at the base of the leaf in Selaginella. It plays a role in the development and protection of the sporangia and is a distinguishing feature of the genus. 3. The structure produced from germination of a microspore of Selaginella is: Gemma Gametangia Female gametophyte Male gametophyte Explanation:Upon germination, a microspore of Selaginella develops into a male gametophyte. This structure produces antheridia, which generate the male gametes necessary for fertilization. 4. The stele of Dryopteris is a: Homostele Dictyostele Protostele Siphonostele Explanation:The stele of Dryopteris is a dictyostele, a type of vascular arrangement where the vascular tissue forms a network of interconnected strands. This structure provides efficient transport of water and nutrients throughout the plant. 5. The sex organs that develop amongst the rhizoids of fern prothallus are: Antheridia Archegonia None of these Sporangia Explanation:Antheridia are the male sex organs that develop among the rhizoids on the fern prothallus. They produce and release sperm cells that swim to the archegonia to fertilize the eggs. 6. Biciliate antherozoids are found in which of the following? Rhizopus Spirogyra Selaginella and Lycopodium Pteris and Dryopteris Explanation:Biciliate antherozoids, which have two flagella, are found in Selaginella and Lycopodium. These flagella enable the antherozoids to swim towards the egg for fertilization. 7. Fern phloem lacks: Phloem parenchyma Sieve tubes All of the above Companion cells Explanation:Fern phloem lacks companion cells, which are typically found in the phloem of angiosperms. Instead, ferns have sieve cells and albuminous cells that perform similar functions in transporting nutrients. 8. The number of neck canal cells in archegonium of Selaginella is: Four Two 08-Oct One Explanation:The archegonium of Selaginella typically contains a single neck canal cell. This cell plays a crucial role in the fertilization process by creating a passage for the sperm to reach the egg. 9. What is special feature of fern archegonia? Long multicellular stalk V.C.C. is absent None of the above Binucleate N.C.C. Explanation:A special feature of fern archegonia is the presence of a binucleate neck canal cell (N.C.C.). This cell plays a crucial role in the fertilization process by creating a passage for the sperm to reach the egg. 10. If the sporangia in a sorus are in the same stage of development it is called: Gradate sorus Simple sorus None of the above Mixed sorus Explanation:A simple sorus is a condition where all the sporangia within a sorus are at the same stage of development. This uniformity ensures that all spores are released simultaneously. Loading …
