What is a Plasmotomy?
What is a Plasmotomy?
The word plasmotomy means uncountable. In many multinucleated organisms, the cells divide and they form multiple nuclei without undergoing the process of mitosis and this is known as plasmotomy. The multinucleated cells further divide into similar daughter cells.
What is Plasmotomy and example?
Plasmotomy is the division of multinucleated cells into daughter cells. It is a type of mitosis mostly found in multinucleated protozoan cell where cytoplasm divides into two or more masses. Example:- plasmodium and opalina.
Is Plasmotomy a type of fission?
Plasmotomy is a form of binary fission where cytokinesis occurs without karyokinesis. It is a kind of asexual reproduction wherein the multinucleate organism gives rise to a large number of multinucleated progenies without undergoing karyokinesis or nuclear division.
Does Plasmodium show Plasmotomy?
After division, the daughter cells later grow and regain the normal number of nuclei by nuclear division. – Examples of organisms undergoing plasmotomy are Opalina, Plasmodium, Pelomyxa amoeba, etc.
What is Paedogamy?
: mutual fertilization of gametes ultimately derived from the same parent cell or gametangium.
What is fission and its types?
Fission can be of two types, namely, binary fission and multiple fission. In binary fission, parent cell divides into two equal halves called daughter cells. Organisms like the amoeba, bacteria, euglena, etc., exhibit binary fission. During multiple fission, organism divides itself into numerous daughter cells.
What is Syngamy in protozoa?
Syngamy or Sexual Fusion: Syngamy is the complete and permanent union or fusion of two specialised protozoan individuals or gametes resulting in the formation of a fertilized cell or zygote or oospore. The nuclei of the gametes fuse to form the zygote nucleus or synkaryon.
What is Hologamy give an example?
In Hologamy, true gametes are not formed. Example: Copromonas subtilis. In Autogamy, gametes are derived from the same parent. True gametes originated from single-parent fuse together to form the zygote.
Which is the best definition of plasmotomy?
plas·mot·o·my. A form of mitosis in multinuclear protozoan cells in which the cytoplasm divides into two or more masses, later reproducing, in some cases by sporulation. plasmotomy. Cell division with unequal separation of cytoplasm.
How does plasmogamy take place in a fungus?
Jump to navigation Jump to search. Plasmogamy is a stage in the sexual reproduction of fungi, in which the cytoplasm of two parent cells (usually from the mycelia) fuses together without the fusion of nuclei, effectively bringing two haploid nuclei close together in the same cell.
What kind of dyscrasia is a plasmacytoma?
Plasmacytoma is a plasma cell dyscrasia in which a plasma cell tumour grows within soft tissue or within the axial skeleton. The International Myeloma Working Group lists three types: solitary plasmacytoma of bone (SPB); extramedullary plasmacytoma (EP), and multiple plasmacytomas that are either primary or recurrent.
Which is first plasmogamy or karyogamy?
In lower fungi however, plasmogamy is usually immediately followed by karyogamy. A comparative genomic study indicated the presence of the machinery for plasmogamy, karyogamy and meiosis in the Amoebozoa.