Which of these describes how traits are shown on a branching tree diagram? 1. the traits on the tree developed in organisms in random order. 2. all the traits on the tree developed at the same time. 3. traits lower on the tree developed before traits higher on the tree. 4. traits higher on the tree developed before traits lower on the tree.

Give the biological term for: structures that display characteristics of living organisms only within living cells

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 beat describes the brain stem