Me i will mark 5 and mark 10 points

question 5 . in the leafs

question 6. the immune system will target the body's own cells

question 7. circulatory and respiratory

question 8 . cell,tissue,organ,system

question 9 . tendons and ligaments

option c is the correct answer.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.