Is selaginella heterosporous
WitrynaFor the first time distinct heterospory (structural as well as functional) is evident in pteridophytes; but out of several hundred forms in the group, only 9 genera … Witrynaquestion_answer 26) Selaginella is heterosporous. It produces two types of spores. The microspore develops into microgametophyte and the megaspore develops into megagametophyte. With respect to gametophyte, which one statement is correct. A) The microgametophyte is devoid of chloro\ [\sim \]phyll at maturity.
Is selaginella heterosporous
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WitrynaSelaginella is heterosporous and, therefore, sporangia are of two types viz., microsporangia and megasporangia. The sporophylls associated with these two types … WitrynaCorrect option is D) The majority of the pteridophytes produce only one kind of spores in sporangia and the plants are called homosporous. For example, Nephrolepis, Lycopodium, Equisetum and ferns, the condition is said to be homospory. Heterosporous condition (produce two kinds of spores i.e., megaspore and …
WitrynaCycas. Pinus. Selaginella. Lycopodium. D. Lycopodium. In pteridophytes, majority of plants are homosporous (producing similar kind of spores) e.g., Lycopodium. However, plants of genera like Selaginella and Salvinia are heterosporous (producing macro and micro spores). Pinus and Cycas, which are gymnosperms, are also heterosporous. WitrynaHeterosporous pteridophytes produce two types of gametophytes, that is, male gametophytes (microspore) and female gametophyte (magaspores). In Heterosporous pteridophytes, spores germinate within sporangia and produce dependent gametophyte. Examples of Heterosporous pteridophytes are Selaginella, Marselia and Salvinia.
WitrynaSelaginella is heterosporous. It produces two kinds of spores. The smaller microspores give rise to male gametophytes and the larger megaspores give rise to female … WitrynaSelaginella is a sporophytic plant (2x) and reproduces sexually. The plants are heterosporous i.e., produce two different types of spores—megaspores and microspores. These spores are produced in megasporangia and microsporangia, respectively which, in turn, are produced on fertile leaves known as megasporophylls …
Witryna1 mar 2024 · Correct Answer - Option 2 : Heterogamous and heterosporous Concept-. Plants are divided into five groups- Thallophytes, Bryophytes, Pteridophytes, …
WitrynaSolution: Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous pteridophytes Lycopodium and Equisetum are homosporous pteridophytes. i.e. … dijeta za mrsavljenje stomakaWitrynaSelaginella is an evergreen, rhizomatous perennial in the genus of Selaginella from the family of Selaginellaceae. Generally known as spike moss or arborvitae ferns, mainly found in tropical and warm-temperate zones, Selaginella is highly valued as small ornamental plants that provide a very satisfactory blossom miracle. Although share … beau patrickWitrynab Life cycle of homosporous plant species, such as a fern, with a bisexual gametophyte and a monosexual sporophyte, and; c life cycle of heterosporous plant species, such as Selaginella sp., with a bisexual sporophyte and two monosexual gametophytes. In each life cycle, the diploid items (2 N) are shown in black, the haploid items (1 N) are in ... beau patton dalton gaWitrynaWhy selaginella is known as heterosporous ? beau patronWitrynaApr 08,2024 - Selaginella is a type of planta)Oogamous and homosporousb)Oogamous and heterosporousc)Isogamous & heterosporousd)Isogamous & HomosporousCorrect answer is option 'B'. ... Heterosporous life histories. A heterosporous life history occurs in some pteridophytes and in all seed plants. It is characterized by morphologically … beau parleur keblack paroleWitryna2 wrz 2024 · Club-mosses (Lycopodiales) are homosporous, but the genera Selaginella and Isoetes are heterosporous, with female spores larger than the male, and gametophytes forming entirely within the spore walls. ... Are there any mosses that are heterosporous or homosporous? Heterospory appears to have developed several … dijeta za regulaciju hormonaWitrynaThe megaspores of Selaginella, containing female gametophytes with still-attached juvenile sporophytes, have the superficial appearance of germinating seeds, from which, however, they differ in many significant respects. Isoetes, like Selaginella, is monoecious and heterosporous. Most of the leaves are fertile; some bear one large ... beau patton