Search results
Results From The WOW.Com Content Network
Protozoa mostly reproduce asexually by binary fission or multiple fission. Many protozoa also exchange genetic material by sexual means (typically, through conjugation ), but this is generally decoupled from reproduction. [ 60 ]
The object experiencing fission is usually a cell, but the term may also refer to how organisms, bodies, populations, or species split into discrete parts. [1] [2] [3] The fission may be binary fission, in which a single organism produces two parts, or multiple fission, in which a single entity produces multiple parts.
It involves karyogamy, the formation of a zygote, which is followed by meiosis and multiple fission. This results in the production of sporozoites. Other forms of replication include endodyogeny and endopolygeny. Endodyogeny is a process of asexual reproduction, favoured by parasites such as Toxoplasma gondii. It involves an unusual process in ...
Protists reproduce asexually or sexually. If the protists reproduce asexually, they do so through binary fission, multiple fission, budding, and fragmentation. If the protists reproduce sexually, they do so through a syngamy process where there is a fusion of the gametes. If this occurs in an individual it is recognized as autogamy.
Multiple fission at the cellular level occurs in many protists, e.g. sporozoans and algae. The nucleus of the parent cell divides several times by mitosis, producing several nuclei. The cytoplasm then separates, creating multiple daughter cells. [5] [6] [7] In apicomplexans, multiple fission, or schizogony appears either as merogony, sporogony ...
Archaea reproduce asexually by binary or multiple fission, fragmentation, ... In these anaerobic environments, protozoa break down plant cellulose to obtain energy ...
However, other types of fission occur in some ciliate groups. These include budding (the emergence of small ciliated offspring, or "swarmers", from the body of a mature parent); strobilation (multiple divisions along the cell body, producing a chain of new organisms); and palintomy (multiple fissions, usually within a cyst). [22]
During this conjugation stage, the micronucleus cell undergoes meiosis. During binary fission, the macronucleus divides amitotically, and the micronucleus cell divides mitotically. These differences play a role in the differences between macronucleus and micronucleus cells as well as provide difference between their vegetative genomes.