WebThe correct option is: (d) Lycopodium Explanation: In pteridophytes, majority of plants are homosporous (producing similar kind of spores) e.g., Lycopodium. However, plants of … WebVascular plants; sporophyte differentiated into stem, leaf, and root; leaves spirally arranged on stem, of the microphyll type; sporangia borne on upper (adaxial) surface of leaves (sporophylls), one sporangium per sporophyll; vascular tissue basically forming a central core in stem (protostelic); homosporous or heterosporous; ligulate (having ...
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WebApr 7, 2024 · In angiosperm, ovules are enclosed by the ovary. In gymnosperm, ovules are not enclosed by an ovary wall. In cycas the stem is erect, stout, and unbranched. However, in pinus and Cedrus the stem is branched selaginella and Salvinia are heterosporous. They have spores of two different sizes, microspores, and megaspores. WebWhereas lower vascular plants, such as club mosses and ferns, are mostly homosporous (produce only ... they are not free-living, as are the gametophytes of other seedless vascular plants. Heterosporous seedless plants are seen as the evolutionary forerunners of seed plants. ... The Jurassic period was as much the age of the cycads (palm-tree ... can rayquaza mega evolve in pokemon shield
Cycad - Wikipedia
WebCycad palms occur in tropical and subtropical climates. Cycasin is a glycoside that has been demonstrated to be responsible for acute hepatotoxic effects. Cattle, sheep, dogs, swine, … WebAug 19, 2024 · Summary. Gymnosperms are heterosporous seed plants that produce naked seeds. They appeared in the Carboniferous period (359–299 million years ago) and were the dominant plant life during the Mesozoic era (251–65.5 million years ago). Modern-day gymnosperms belong to four divisions. WebIt has sporophylls that produce sporangia and they come in two types: Mega- and Micro- as in all heterosporous life cycles,so cycads are heterosporous Cycad cones are unisexual, in fact the plants producing them are dioecious , having separate male and female plants . can ray rice play in the nfl