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A gametangium (pl.: gametangia) is a sex organ or cell in which gametes are produced that is found in many multicellular protists, algae, fungi, and the gametophytes of plants. In contrast to gametogenesis in animals , a gametangium is a haploid structure and formation of gametes does not involve meiosis .
gametangium (pl. gametangia) gametophyte. gene-for-gene hypothesis. general resistance (syn. horizontal resistance, race non-specific resistance) genotype. germ theory. giant cell. girdle. giant cells. gram-negative. Gram-negative bacteria are those that do not retain crystal violet dye in the Gram staining protocol. gram-positive
Monoicous plants are necessarily hermaphroditic, meaning that the same plant produces gametes of both sexes. [16] The exact arrangement of the antheridia and archegonia in monoicous plants varies. They may be borne on different shoots (autoicous), on the same shoot but not together in a common structure (paroicous or paroecious), or together in ...
The term "plants" is taken here to mean the Archaeplastida, i.e. the glaucophytes, red and green algae and land plants. Alternation of generations occurs in almost all multicellular red and green algae, both freshwater forms (such as Cladophora) and seaweeds (such as Ulva). In most, the generations are homomorphic (isomorphic) and free-living.
An immature zygosporangium of the Rhizopus fungus forming from two fused gametangia, showing a "yoke" shape.. The name Zygomycota refers to the zygosporangia characteristically formed by the members of this clade, in which resistant spherical spores are formed during sexual reproduction.
In phycology and mycology, oogonium refers to a female gametangium if the union of the male (motile or non-motile) and the female gamete takes place within this structure. [ 12 ] [ 13 ] In Oomycota and some other organisms, the female oogonia, and the male equivalent antheridia , are a result of sexual sporulation, i.e. the development of ...
Some of the 75,000 U.S. federal workers who the Office of Personnel Management says accepted a resignation buyout offer were ready to retire anyway. Many bristled at Donald Trump's description of ...
The male sexual organ (gametangium) of fungi. Produces either antherozoids (flagellate gametes or sperm) or gametic nuclei. [21] apical . acro-At the tip or end (apex). [22] apiculus A short projection at the end of a spore. [23] aplanospore A non-motile asexual spore in some Zygomycetes, contained in globose sporangia or cylindrical merosporangia.