Though humans and mammals have to rely on sex to procreate, many animals have other options.
Among vertebrates, or animals with backbones, asexual reproduction is more rare. However, California condors, New Mexico whiptail lizards and certain fish all reproduce via a process known as parthenogenesis — a Greek word whose two roots translate to "virgin creation."
Despite the tradeoffs, vertebrates overwhelmingly choose to have sex rather than clone themselves. The reason behind this is a fundamental unanswered question in evolutionary biology. Researchers who have thought long enough on the subject often find themselves searching for answers in the organisms that break the mold — asexual vertebrates.
. Aquarium tour guides nicknamed her “Bubbles” after watching her frolic in the emissions from staffers’ scuba masks, and the name stuck.
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