What causes ocean water to be warmer at the equator than farther north? a. sunlight hits directly so the warmth is more concentrated b. cold water currents move from the poles to the equator c. seasonal winds push warm water away from the coasts d. sunlight hits at an angle so the warmth is spread over a wider area the answer is a. sunlight hits directly so the warmth is more concentrated (apex)

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.