what is the random movement of a substance from an area of high concentration to an area of low concentration called?

The images show the wings of a bat and a bee. from this evidence, what can you conclude about the evolutionary relationship between these organisms? a. the wing structures of the bat and the bee are different, indicating they didn’t inherit wings from a common ancestor. b. the wing structures of the bat and the bee are different, indicating they inherited wings from a common ancestor. c. the functions of bat wings and bee wings are the same, indicating they obtained wings from a common ancestor. d. the functions of bat wings and bee wings are different, indicating they didn’t obtain wings from a common ancestor.

Iwanna go do something with my ideas? ?

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.