3 ms·
Do we have other examples of this? There is a second kidney, lung, eye etc, but a hot spare isn’t quite the same as a completely different structure.
by lostlogin 3y ago
Do we have other examples of this?
There is a second kidney, lung, eye etc, but a hot spare isn’t quite the same as a completely different structure.
- Jensson 3y agoYour stomach and intestines, they aren't all necessary but they help. And you can see their structure varying significantly in different animals. Or a tail, an entire extra limb just to keep balance a bit better. Or ears, you can hear without them but they help capture sound a bit better.