The tail plumage of peacocks for example is the opposite of advantageous in everyday life. But since it's sexually selected for (peahens like a showoff with a big tail-fan as a sign of fitness), it's advantageous for reproduction.
The tail plumage of peacocks for example is the opposite of advantageous in everyday life. But since it's sexually selected for (peahens like a showoff with a big tail-fan as a sign of fitness), it's advantageous for reproduction.
Coal is trees
Oil is plankton