In the Atlantic Ocean, the mid-ocean ridge is a. a straight line between the Americas and Europe/Africa.
b. a line that nearly has the shape of the coastlines of the
Americas and Europe/Africa.
C. not visible.
d. none of these

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade

Along what geographical feature are most of the oil producing regions located

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.