Iwas sick when i got this for homework so i have no clue.
answer these asap!

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

What is the next step in the process after a substrate enters the active site of an enzyme

Polar zones are cold and tend to be dry because of a pressure system of cold. low high