Which of the following is formed when a group of tissues works together to perform a common function?
a. brain
b. organ system
c. body
d. organ

D: Organ

Since it consist of multiple tissue that perform a function by working together

hi! do you know the answer for this flvs question?

what do anaerobic organisms have in common with photosynthetic organisms?

they both appeared on earth at about the same time.

they both can only exist as single-celled organisms.

they both need an energy source in order to survive.

they both produce carbon dioxide as a waste product.

i am in desperate need of !