Please help with 3 Simple Questions! 1. What is the relationship between DNA and gene expression? How do they depend on each other?

2. Why is it important for the “on” and “off” mechanism of gene regulation?

3. Since there are DNA segments that do not code for amino acids, what is their purpose?

**Please use simple answers considering I'm 10th-grade, thank you! <3**

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?

At which location in earth’s interior does the top density continue to increase as thickness decreases?

What advantages does a pedigree have over a written passage?