Question

Why do vestigial structures not always disappear and still show up in organism? For example humans still have a tail bone, even though we don't have a tail.

1) The organism depends on them to survive

2) The structure is not harmful to the organisms survival


3)Sticks around just incase we need it again


4)The structure makes the organism look cooler

Answer 1

3 would be my best guess

Step-by-step explanation:

we dont depend on it

its not harmful but that wouldn't be a reason to have it

it doesnt look cool

Answer 2

3 is most likely for the sake of evolution