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Sphenopsida class belongs' to
Psilopsida, Lycopsida, Sphenopsida, Pteropsida = Pteridophytes!
Pteridophytes are vascular cryptogams possessing xylem and phloem, exhibiting alternation of generations with a dominant sporophytic phase. They are subdivided into four distinct taxonomic classes based on vegetative and reproductive morphology.
Members of class Sphenopsida (commonly called horsetails or scouring rushes) feature articulated, jointed stems with distinct nodes and internodes, whorls of scale leaves at nodes, silica-impregnated epidermal cell walls, and compact strobili/cones at branch apices.
Bryophytes are non-vascular plants divided into liverworts and mosses. Gymnosperms are naked-seeded phanerogams (Conifers, Cycads, Ginkgo). Angiosperms are flowering plants (Monocots, Dicots). Sphenopsida belongs solely to pteridophytes.
Diagnose every choice: Know exactly why the right option works and why distractors fail.
Incorrect. Bryophytes include Hepaticopsida (liverworts) and Bryopsida (mosses), not Sphenopsida.
Incorrect. Angiosperms are flowering plants classified into Monocotyledonae and Dicotyledonae.
Incorrect. Gymnosperms include Cycadopsida, Coniferopsida, and Gnetopsida.
100% accurate. Sphenopsida is one of the four textbook classes of pteridophytes.
The suffix "-opsida" is used in bryophytes (e.g. Hepaticopsida), pteridophytes (e.g. Sphenopsida), and gymnosperms (e.g. Cycadopsida). Students who only look at the suffix can get disoriented unless they anchor to Equisetum.
"Pteridophytes comprise four classes: Psilopsida, Lycopsida, Sphenopsida, and Pteropsida."
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