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In Star Trek, the Trill were a race of humanoids who incorporated a long-living symbiont. One of them was a main character on the series Star Trek: Deep Space Nine . In the series Stargate SG-1 , both the principal villains, the Goa'uld and their benevolent versions, the Tok'ra were symbionts who grafted themselves into the human nervous system.
For example, in lichens, which consist of fungal and photosynthetic symbionts, the fungal partners cannot live on their own. [ 11 ] [ 19 ] [ 20 ] [ 21 ] The algal or cyanobacterial symbionts in lichens, such as Trentepohlia , can generally live independently, and their part of the relationship is therefore described as facultative (optional ...
For example, if one of the photosystems is lost from the plastid, the intermediate electron carriers may lose or gain too many electrons, signalling the need for repair of a photosystem. The time delay involved in signalling the nucleus and transporting a cytosolic protein to the organelle results in the production of damaging reactive oxygen ...
One of the most commented aspects of Fledgling is its unusual type of vampire, the result of Butler's fusion of vampire fiction with science fiction. While the Ina are simply another species coexisting with humanity, the traditional vampire's monstrosity and abnormality routinely symbolizes deviant sexuality and decadence, serves as a foil for humanity, or is a projection of repressed sexual ...
An example is nitrogen-fixing bacteria in certain plant roots, such as pea aphid symbionts. A third type is mixed-mode transmission, where symbionts move horizontally for some generations, after which they are acquired vertically. [26] [27] [28] Wigglesworthia, a tsetse fly symbiont, [28] is vertically transmitted (via mother's milk). [28]
In May 2020, researchers reported that Microsporidia MB, a symbiont in the midgut and ovaries of An. arabiensis, significantly impaired transmission of P. falciparum, had "no overt effect" on the fitness of host mosquitoes, and was transmitted vertically (through inheritance). [23]
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For example, while in the laboratory the midgut crypts of the bean bug Riptortus pedestris can be colonized by a large diversity of bacterial species in nature it only occurs with one specific Burkholderia species.