Answer:
C
Explanation:
because i took the test and got it right
***see attached pic***
Some helpful tips:
The nucleus is always going to be the big, spherical shape.
The ER is always going to be a weird, folded looking structure attached to the nucleus (rough = has ribosomes on it which are usually represented by little dots, smooth = has no ribosomes on it aka no dots)
The GA looks like the ER but it is not going to be attached to the nucleus like the ER is.
The mitochondria is always going to be pill-shaped and have weird folds inside of it.
B) Cell wall
The cell wall is a structure important cell protection and shape. It is necessary for the survival of unicellular organisms
I "THINK" its biogeochemical cycles I'm not 100% sure.
Platelets (prevent blood loss) and white blood cells (fight infection)