The upward movement of warm air and the downward movement of cool air form a convection current. True
False

Witch type of microscope is used to view very small cell components like proteins and dna?

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d

Define adaptation. why do organisms adapt? give an example.