In which fungi both gametes are motile?

In which fungi both the gametes are motile?

In some species of fungi and algae, female and male gametes are motile and almost identical. Higher animals, plants, and some species of fungi and algae show a particular type of anisogamy known as oogamy. In oogamy, the female gamete is much larger than the male sex cell, and it is non-motile.

Which of the algae has both gametes motile?

All Gametes Motile in some (not all) Algae

In some green algae, including the unicellular, motile Chlamydomonas reinhardtii, the gametes are motile biflagellate cells all the same size, though of two different mating types.

What are Gametangia fungi?

A gametangium (plural: gametangia) is an 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.

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What plants have motile gametes?

While absent from flowering and most cone-bearing plants, motile cells are found in less derived taxa, including bryophytes (mosses, liverworts and hornworts), pteridophytes (lycophytes and ferns) and some seed plants (Ginkgo and cycads). …

What are Homogametes or Isogametes?

Homogametes are also known as isogametes. Homogametes are similar in morphological appearance and male and female gametes can’t be distinguished. For example, in Rhizopus. Heterogametes are the gametes that are morphologically dissimilar and thus, male and female gametes can be distinguished.

What is required for transport of male gametes in bryophytes and pteridophytes?

In bryophytes and pteridophytes, transport of male gamete requires water. The male gametes of bryophytes and pteridophytes are motile and can swim through water with the help of their flagella. They are transferred to the female reproductive organ for fertilsation.

When both gametes are non-motile?

In flowering plants, the gametes are non-motile cells within gametophytes. The form of anisogamy that occurs in animals, including humans, is oogamy, where a large, non-motile egg (ovum) is fertilized by a small, motile sperm (spermatozoon).

Is Blue Green Algae motile?


The cells are without compartments (no membrane-bound organelles): in particular there is no nuclear region defined by a membrane and photosynthetic pigments are distributed throughout the cells (not in chloroplasts). Sexual reproduction and motile cells are absent.

In which group of algae both spores and gametes are non-motile?

Members of Rhodophyceae lack motile cells in their lifecycle. They reproduce asexually by non-motile spores and sexually by non-motile gametes.

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In which fungi Plasmogamy is followed by karyogamy immediately?

Plasmogamy is immediately followed by karyogamy in lower fungi. In higher fungi, karyogamy is delayed for several generations, maintaining the dikaryotic stage of cells.

What is the difference between Plasmogamy and karyogamy?

Plasmogamy refers to the fusion of the cytoplasm of two gametes or to two vegetative cells which work as gametes. Karyogamy refers to the fusion of two nuclei during fertilization.

What is the difference between gametangia and gametophyte?

Gametangia is the gamete producing sex organ in plants, whereas gametophyte is the haploid phase in the life cycle of plants that produce gametes.

Are fungi motile?

Fungi have plasma membranes similar to other eukaryotes, except that the structure is stabilized by ergosterol: a steroid molecule that replaces the cholesterol found in animal cell membranes. Most members of the kingdom Fungi are nonmotile.

Do mosses have motile or nonmotile gametes?

In the plants included in this article—bryophytes (mosses, hornworts, and liverworts) and tracheophytes (vascular plants)—sexual reproduction is of the oogamous type, or a modification thereof, in which the sex cells, or gametes, are of two types, a larger nonmotile egg and a smaller motile sperm.

Are plant gametes motile?

Sex-possessing organisms perform sexual reproduction, in which gametes from different sexes fuse to produce offspring. In most eukaryotes, one or both sex gametes are motile, and gametes actively approach each other to fuse. However, in flowering plants, the gametes of both sexes lack motility.