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**

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.