Which of the following is is the name of the process scientists use to gain knowledge about the physical world

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?

Which blood cell spend most of their time in the lymphatic system?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry