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This notion of machine "reproduction" anticipates the later notion of self-replicating machines, although in chapter xxv: the machines—concluded, the imaginary book supposes that while there is a danger that humans will become subservient to machines, the machines will still need humans to assist in their reproduction and maintenance:
Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
Sexual reproduction has many drawbacks, since it requires far more energy than asexual reproduction and diverts the organisms from other pursuits, and there is some argument about why so many species use it. George C. Williams used lottery tickets as an analogy in one explanation for the widespread use of sexual reproduction. [36]
Pumpkins just keep getting bigger and bigger each year, and scientists and farmers don't even know how large they can get. You're not imagining it. Pumpkins just keep getting bigger and bigger ...
Many protists reproduce sexually, as do many multicellular plants, animals, and fungi. In the eukaryotic fossil record, sexual reproduction first appeared about 2.0 billion years ago in the Proterozoic Eon, [64] [65] although a later date, 1.2 billion years ago, has also been presented.
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Once considered a desperate substitute to use in beer and bread, only in the absence of barley and wheat, the pumpkin's popularity grew out the romantic nostalgia of rural residents turned city-dwellers, and its commercialization has now reached unprecedented heights. [2] Ott traces the shifting status of the pumpkin in American culture. [3]