(Q).
Q: What is the major source of water vapor in the atmosphere? Choices: - drift - sea - streams - ocean A:
(A).
ocean

(Q).
Q: What are the strongest magnets made? Choices: - permanent magnets - polarized magnets - natural magnets - electromagnets A:
(A).
electromagnets

(Q).
Q: Which theory states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells? Choices: - theory of evolution - microcellular theory - natural selection - unified cell theory A:
(A).
unified cell theory