A vestigial structure is a structure that kind-of just "hangs out" in our bodies. We don't really need it, yet it is there. So, why is it there??? We probably needed it, for example, when we needed to digest plants. (Appendix) Some say that the appendix was used for digesting plants and berries, but it is really just speculation. We "evolved" to not need the appendix.
Here are some other vestigial examples: wisdom teeth, tail bone, pelvic bone in a snake, and wings on a flightless bird.
I hope this helped, if it did not let me know!!
I hope you have a fantastical day!!!XD
Plants and some types of archaea or bacteria use photosynthesis to create food.
Answer:
The second one
The third one
and the fourth one
Explanation:
The only reason I didn't choose the second one was because what if you could die from drinking that liquid that you thought was "water", it could have been chemicals!
Answer:
the response at R2 after lidocaine application will not be zero
Explanation:
The response at R2 after lidocaine would not be zero because it is recording the of all action potentials and some axons may be unaffected.