Term that means interruption of blood supply to the brain is

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

In the water cycle , when does water undergo a chemical change

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?