The source of water for the great lakes was which played a major role in forming the lakes during earth's recent geologic past. a. erupting volcanoes b. stormy oceans c. manmade canals d. melting glaciers

Barbara is converting 78°f to degrees celsius. first, she subtracts 32 from 78. what is the next step?

What are chlorofluorocarbons made of

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?