Every other mammal has finger/toenails, most of them make very good use of it, others not that much (e.g. elephant toenails look pretty useless). Organisms don’t necessarily keep inherited traits because they’re useful, but because they’re not very detrimental.
Every other mammal has finger/toenails, most of them make very good use of it, others not that much (e.g. elephant toenails look pretty useless). Organisms don’t necessarily keep inherited traits because they’re useful, but because they’re not very detrimental.