All organisms inherit their characteristics/traits from their parents. In sexual reproduction, each parent contributes deoxyribonucleic acid (DNA) in gametes to provide the instructions for the development and expression of traits in their offspring. The sections of DNA which control the expression of traits are called .

In which situations is the principle of cross-cutting relationship useful in determining relative age?

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?

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?