What information can be gathered from a DNA sequence?

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

Everything that surrounds a particular organism

Polar zones are cold and tend to be dry because of a pressure system of cold. low high