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HOLIN-ANTIHOLIN SYSTEMS. "A similar puzzle arises in the case of holin-antiholin systems, which are encoded by bacteriophages and control the timing of host cell lysis and the dispersal of virions. Chromosomally-encoded homologs are biochemically distinct from toxin-antitoxin systems, but also result in cell death." https://lnkd.in/ecP3KMX View in LinkedIn

TOXIN-ANTITOXIN SYSTEMS. "In prokaryotes, conjugative plasmids often encode for the simultaneous production of long-lived toxins and short-lived antitoxins. When these are present together, the toxin is harmless to the host. However, if one daughter cell is cured of the plasmid, it will inherit toxic cytoplasm without a source of antitoxin and will die." Train driver’s Dead Man’s Switch. https://lnkd.in/ecP3KMX View in LinkedIn

TRANSPOSONS KILLING THE HOST. "This process may be associated with occurrence of new mutations in the transferred genes and their improved ability to survive in the new host. This mechanism has been suggested to occur in S. cerevisiae although the author allows that, “this hypothesis lacks direct experimental support”. https://lnkd.in/ecP3KMX View in LinkedIn

ADAPTIVE FOR REPRODUCTION. "In Pacific salmon and the marsupial Antechinus stuartii, the ability to exploit tissue protein as an energy reserve may increase reproductive success. In Octopus, the behavioral effects of optic gland secretion are likely to have an impact on hatching success, as time spent feeding is time not spent on brood care." https://lnkd.in/ecP3KMX View in LinkedIn

SINGLE POINT EXPLOSION. “We owe the great diversity that we see today (plus or minus 10 million species) to the incredible diversification that occurred during the Cambrian period.” https://lnkd.in/ex6BW5w View in LinkedIn

SELF-EMOLIATION. "In vertebrates, for example, the high levels of free corticosteroids that trigger rapid senescence and death also allow tissue protein to be consumed as an energy source during a brief and intensely competitive breeding season." https://lnkd.in/ecP3KMX View in LinkedIn

BODY PLAN DIVERSITY. “The Cambrian explosion is named for the geologically sudden appearance of numerous metazoan body plans (many of living phyla) between about 530 and 520 million years ago, only 1.7% of the duration of the fossil record of animals.” https://lnkd.in/eagvRCB View in LinkedIn

FUNCTION OF EARLY DEATH. "In many semelparous organisms, the adaptive function of the nominal ‘death program’ is apparently to increase reproduction, with organismal death resulting as an incidental side-effect (making organismal senescence an example of “by-product death”." https://lnkd.in/ecP3KMX View in LinkedIn

“THE ENIGMA that is the Cambrian Explosion is one of the most perplexing, fascinating, and important events in the evolution of life on Earth. Enigmatic due to the lack of evidence, and that which we do have is not necessarily clear in its implications producing an array of varying views, and hypotheses.” https://lnkd.in/ex6BW5w View in LinkedIn

SOMETIMES PROGRAMMED. "There is substantial evidence for genetic control of senescence in some iteroparous animals, indicating that senescence is at least sometimes “programmed” (in the inclusive sense) and highlighting the question of the relationship between aging “programs” and selection." https://lnkd.in/ecP3KMX View in LinkedIn