How does NATO shape Europe?

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

After considering options, a student using the problem-solving process should next

How many structures do prokaryotic cells have in common with the eukaryotic cells? a. 2b. 3c. 4d. 5