Word: predatorâ
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...survival and chance to reproduce, not that of others. Since altruistic behavior reduces an organism's chances to survive, evolution should be expected to breed it out of all species. Still, some birds risk their lives for the flock by crying out to warn of the presence of a predator???thus chancing attracting the attention of the enemy and being singled out for attack. Dolphins sometimes try to save injured dolphins from drowning. Social insects serve the entire community, some going so far as to give their lives to protect the colony from invaders...
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