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27 cze 2024 · The more primitive fungi produce spores in sporangia, which are saclike sporophores whose entire cytoplasmic contents cleave into spores, called sporangiospores. Thus, they differ from more advanced fungi in that their asexual spores are endogenous.
9 cze 2024 · Sporangia are hard sacks on the ends of the hyphae where spores grow, and when a sporangium -- or a grouping of the sporangia -- reaches maturity, it breaks open, speading thousands of...
25 cze 2024 · In ferns, spores are contained within cases called sporangia that are located on the underside of leaves. Examples of sori and arrangements of sporangia in various species of ferns. Hand in hand with the reduction in size of single sporangia are seen more and more complex aggregations of sporangia known as sori.
27 cze 2024 · Spores are usually single cells produced by fragmentation of the mycelium or within specialized structures (sporangia, gametangia, sporophores, etc.). Spores may be produced either directly by asexual methods or indirectly by sexual reproduction.
26 cze 2024 · The sporangia commonly occur in clusters called sori. They are usually found on the undersurface of the fronds. Each sporangium is attached to the sporophyll by a short stalk. Biology Lab 244 Learn with flashcards, games, and more — for free.
13 cze 2024 · Sporangia, which were yellowish-brown, contained multiple spores (Fig. 1a), over 70% of which were able to germinate within 20 d of culture on PGR-free MS medium. Germinated spores were unicellular and yellow-green (Fig. 1 b), gradually forming long green filaments by longitudinal cell division.
5 dni temu · A flower, also known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae ). Flowers consist of a combination of vegetative organs – sepals that enclose and protect the developing flower, petals that attract pollinators, and reproductive organs that produce gametophytes, which in ...
