Which of the following is not an example of a service provided by beneficial bacteria

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).