Beth made the chart shown. which headings best complete the chart? x: use dc y: use ac x: use ac y: use dc x: powered by current y: powered by magnetism x: powered by magnetism y: powered by current

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?

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird

The diagram shows a chicken embryo and a human embryo