I been stuck on this question for two days. please help me guys it will mean a lot :(

Where is the nictitating membrane found? a. between the eyelid and the eyeball b. between the retina and the optic nerve c. between the outer and middle ear d. in the organ of corti in the middle ear

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture

What is the function of the nucleus in the euglena cells you observed?