8. Which is a feedback mechanism the human body uses to maintain homeostasis?
A.
copying genetic material during cell division
B. rejecting a flu vaccine by the immune system
C.
perspiring to lower the body temperature
D
learning a new behavior to survive in a new environment

put the answers   and i could answer.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

the answers would be

the first one and the second one